TMPSNSRD-RTD2 - Microchip Technology

Design ideas in this guide use the following devices. A complete device list and corresponding data sheets for these

products can be found at www.microchip.com/analog.

Operational

Amplifiers

Comparators Analog-to-Digital

Converters

Temperature

Sensors

Voltage

References

Digital

Potentiometers

Digital-to-Analog

Converters

MCP6XX

MCP6XXX

MCP6V01/2/3

MCP6V06/7/8

MCP654X

MCP656X

MCP3421

MCP3422/3/4

MCP355X

MCP3901

MCP9800

MCP9804

MCP9700/A

MCP9701/A

MCP1525

MCP1541

MCP40XX

MCP40D1X

MCP41XX

MCP42XX

MCP43XX

MCP45XX

MCP46XX

MCP41XXX

MCP42XXX

MCP4725

MCP4728

MCP482X

MCP492X

www.microchip.com/analog

Analog and Interface Product Solutions

Signal Chain Design Guide

Devices For Use With Sensors

2 Signal Chain Design Guide

Signal Chain Overview

Digital DomainAnalog Domain

Driver

(MOSFET)

Op Amp DAC/PWM

Actuators

Motors, Valves,

Relays, Switches,

Speakers, Horns,

LEDs

ADC/

V-to-Freq

Amp

Sensors

Filter

Reference

Voltage

MUX

PIC

MCU

or dsPIC

DSC

Indicator

(LCD, LED)

Digital

Potentiometer

Typical Sensor Signal Chain Control Loop

Typical sensor applications involve the monitoring of sensor

parameters and controlling of actuators. The sensor signal

chain, as shown below, consists of analog and digital

domains. Typical sensors output very low amplitude analog

signals. These weak analog signals are ampliﬁ ed and ﬁ ltered,

and converted to digital using op amps, an analog-to-digital

or voltage-to-frequency converter, and is processed at the

MCU. The analog sensor output typically needs proper signal

conditioning before it gets converted to a digital signal.

The MCU controls the actuators and maintains the operation

of the sensor signal conditioning circuits based on the

condition of the signal detection. For the digital to analog

feedback path, the digital-to-analog converter (DAC), digital

potentiometer and Pulse-Width-Modulator (PWM) devices are

most commonly used. The MOSFET driver is commonly used

for the interface between the feedback circuit and actuators

such as motors and valves. Microchip offers a large portfolio

of devices for signal chain applications.

Signal Chain Design Guide 3

Many system applications require the measurement of a

physical or electrical condition, or the presence or absence

of a known physical, electrical or chemical quantity. Analog

sensors are typically used to indicate the magnitude or

change in the environmental condition, by reacting to the

condition and generating a change in an electrical property

as a result.

Typical phenomena that are measured are:

■



Electrical Signal and Properties

■



Magnetic Signal and Properties

■



Temperature

■



Humidity

■



Force, Weight, Torque and Pressure

■



Motion and Vibration

■



Flow

■



Fluid Level and Volume

■



Light and Infrared

■



Chemistry/Gas

Phenomena Sensor Electrical Output

Magnetic Hall Effect Voltage

Magneto-Resistive Resistance

Temperature Thermocouple Voltage

RTD Resistance

Thermistor Resistance

IC Voltage

Infrared Current

Thermopile Voltage

Humidity Capacitive Capacitance

Infrared Current

Force, Weight, Torque, Pressure Strain Gauge Resistance/Voltage

Load Cell Resistance

Piezo-electric Voltage or Charge

Mechanical Transducer Resistance, Voltage, Capacitance

Motion and Vibration LVDT AC Voltage

Piezo-electric Voltage or Charge

Microphone Voltage

Ultrasonic Voltage, Resistive, Current

Accelerometer Voltage

Flow Magnetic Flowmeter Voltage

Mass Flowmeter Resistance/Voltage

Ultrasound/Doppler Frequency

Hot-wire Anemometer Resistance

Mechanical Transducer (turbine) Voltage

Fluid Level and Volume Ultrasound Time Delay

Mechanical Transducer Resistance, Voltage

Capacitor Capacitance

Switch On/Off

Thermal Voltage

Light Photodiode Current

Chemical pH Electrode Voltage

Solution Conductivity Resistance/Current

CO Sensor Voltage or Charge

Photodiode (turbidity, colorimeter) Current

Summary Of Common Physical Conditions and Related Sensor Types

Sensor Overview

There are sensors that respond to these phenomena by

producing the following electrical properties:

■



Voltage

■



Current

■



Resistance

■



Capacitance

■



Charge

This electrical property is then conditioned by an analog

circuit before being converted to a digital circuit. In this way,

the environmental condition can be “measured” and the

system can make decisions based on the result.

The table below provides an overview of typical phenomena,

the type of sensor commonly used to measure the

phenomena and electrical output of the sensor.

For additional information, please refer to Application Note

AN990.

4 Signal Chain Design Guide

Operational Amplifiers (Op Amps)

Microchip Technology offers a broad portfolio of op amp

families built on advanced CMOS technology. These families

are offered in single, dual and quad configurations, which

are available in space saving packages.

These op amp families include devices with Quiescent

Current (IQ) per amplifier between 0.6 µA and 6 mA, with

a Gain Bandwidth Product (GBWP) between 10 kHz and

60MHz, respectively. The op amp with lowest supply voltage

(VDD) operates between 1.4V and 6.0V, while the op amp

with highest VDD operates between 6.5V and 16.0V.

These op amp families fall into the following categories:

General Purpose, Low Offset, Auto-zeroed, High Speed, Low

Noise and mCal (self calibrating input offset voltage (VOS)).

Comparators

The MCP6541 and MCP6561 family of comparators

provide ultra low power, 600 nA typical, and higher speed

with 40 ns propagation delay, respectively. The MCP6541

family low operating current is suitable for battery powered

application and the output drive capability is ideal for alert

buzzer driver applications. The MCP6561 family with greater

than 4 MHz toggle frequency is ideal for higher speed

embedded system applications where sinusoidal output

from sensors to square wave conversion is needed. The

47ns typical propagation delay also makes this device ideal

for microprocessor interface. Both families of comparators

are available with single, dual and quad as well as with

push-pull and open-drain output options (MCP6546 and

MCP6566).

Programmable Gain Amplifier (PGA)

The MCP6S21/2/6/8 and MCP6S91/2/3 PGA families

give the designer digital control over an amplifier using

a serial interface (SPI bus). An input analog multiplexer

with 1, 2, 6 or 8 inputs can be set to the desired input

signal. The gain can be set to one of eight non-inverting

gains: +1, 2, 4, 5, 8, 10, 16 and 32 V/V. In addition, a

software shutdown mode offers significant power savings

for portable embedded designs. This is all achieved in one

simple integrated part that allows for considerably greater

bandwidth, while maintaining a low supply current. Systems

with multiple sensors are significantly simplified.

The MCP6G01 family are analog Selectable Gain Amplifiers

(SGA). The Gain Select input pin(s) set a gain of +1V/V,

+10 V/V and +50 V/V. The Chip Select pin on the

MCP6G03 puts it into shutdown to conserve power.

Product Overviews

Analog-to-Digital Converters (ADC)

Microchip offers a broad portfolio of high-precision

Delta-Sigma, SAR and Dual Slope A/D Converters. The

MCP3550/1/3 Delta-Sigma ADCs offer up to 22-bit

resolution with only 120 A typical current consumption in

a small 8-pin MSOP package. The MCP3421 is a single

channel Delta-Sigma ADC and is available in a small 6-pin

SOT-23 package. It includes a voltage reference and PGA.

The user can select the conversion resolution up to 18 bits.

The MCP3422/3 and the MCP3424 are two channel and

four channel versions, respectively, of the MCP3421 device.

The MCP300X (10-bit), MCP320X (12-bit) and MCP330X

(13-bit) SAR ADCs combine high performance and low

power consumption in a small package, making them ideal

for embedded control applications. The TC5XX Dual Slope

ADC devices offer another alternative with up to 17-bits of

conversion resolution.

The “Analog-to-Digital Converter Design Guide” (Microchip

Document No. 21841) shows various application examples

of the ADC devices.

Microchip also offers many high accuracy energy metering

devices which are based on the Delta-Sigma ADC cores.

The “Complete Utility Metering Solution Guide” (Microchip

Document No: 24930) offers detailed solutions for metering

applications.

Voltage References

Microchip offers the MCP15XX family of low power and low

dropout precision Voltage References. The family includes

the MCP1525 with an output voltage of 2.5V and the

MCP1541 with an output voltage of 4.096V. Microchip’s

voltage references are offered in SOT23-3 and TO-92

packages.

Signal Chain Design Guide 5

Digital Potentiometers

Microchip’s family of digital potentiometers offer a wide

range of options. These devices support the 6-bit through

8-bit applications. Offering both volatile and non-volatile

options, with digital interfaces from the simple Up/

Down interface to the standard SPI and I2C™ interfaces.

These devices are offered in small packages such as

6-lead SC70 and 8-lead DFN for the single potentiometer

devices, 14-lead TSSOP and 16-lead QFN packages for the

dual potentiometer devices, and 20-lead TSSOP and QFN

packages for the quad potentiometer devices. Non-volatile

devices offer a Wiperlock™ Technology feature, while volatile

devices will operate down to 1.8V. Resistances are offered

from 2.1k to 100 k. Over 50 device configurations are

currently available.

The “Digital Potentiometer Design Guide” (Microchip

Document No. 22017), shows various application examples

of the digital potentiometer devices.

Product Overviews

Digital-to-Analog Converters (DAC)

Microchip has a number of Digital-to-Analog Converters that

range from high performance 12-bit devices to cost effective

8-bit devices.

The MCP4725 is a single channel 12-bit DAC with non-

volatile memory (EEPROM). The user can store DAC input

code and configuration register bits into the EEPROM. This

non-volatile memory feature enables the device to hold

the DAC input code during power-off time allowing the DAC

output to be available immediately after power-up. This

feature is very useful when the DAC is used as a supporting

device for other device operations in systems. The

MCP4725 is availabe in a tiny SOT23-6 package.

The MCP4728 is a 12-bit DAC with four analog outputs. This

device also has non-volatile memory (EEPROM) for each DAC

channel. The user can select internal reference or VDD as

reference individually for each channel. The MCP4725 and

MCP4728 are available with I2C serial interface.

The MCP4821/2 family of 12-bit DACs combines high

performance with an internal reference voltage and SPI

interface. The MCP4921/2 family is similar and allows

for an external reference. These DAC devices provide

high accuracy and low noise, and are ideal for industrial

applications where calibration or compensation of signals

(such as temperature, pressure and humidity) is required.

The TC1320/1 family of DACs has 8- and 10-bit precision

that uses the 2-wire SMBus/I2C serial interface protocol.

6 Signal Chain Design Guide

Local Sensing

Local sensors are located relatively close to their signal

conditioning circuits, and the noise environment is not

severe; most of these sensors are single ended (not

differential). Non-inverting amplifiers are a good choice for

amplifying most of these sensors’ output because they have

high input impedance, and require a minimal amount of

discrete components.

Key Amplifier Features

■



Low Cost

–

General Purpose Op Amps

■



High Precision

–

Low Offset Op Amps

–

Auto-zeroed Op Amps

–

Low Noise Op Amps

■



Rail-to-Rail Input/Output

–

Most Op Amp families

■



High Input Impedance

–

Almost all Op Amp families

■



Low Power and Portable Applications

–

Low Power Op Amps

■



High Bandwidth and Slew Rate

–

High Speed Op Amps

■



Load Drive

–

High Output Drive Op Amps

PIC16F690

MCP6291

DIG

100 nF

SEN

INT

R6.65 MΩ

SEN

INT

20 kΩ

100 nF

–

Comparator

REF

Latch

Timer1

PH Monitor

VOUT

MCP6XX,

MCP6XXX

–

Classic Gain Ampliﬁ er

Capacitive Humidity Sensor Circuit

(PIC16F690DM-PCTLHS)

Local Sensors

Sensors and Applications

Single Sensors

■



Thermistors for battery chargers and power supply

temperature protection

■



Humidity Sensors for process control

■



Pyroelectric infrared intrusion alarms, motion detection

and garage door openers

■



Smoke and fire sensors for home and office

■



Charge amplifier for Piezoelectric Transducer detection

■



Thermistor for battery chargers and home thermostats

■



LVDT position and rotation sensors for industrial control

■



Hall effect sensors for engine speed sensing and door

openers

■



Photoelectric infrared detector

■



Photoelectric motion detectors, flame detectors, intrusion

alarms

Multiple Local Sensors

■



Temperature measurement at multiple points on a Printed

Circuit Board (PCB)

■



Sensors that require temperature correction

■



Weather measurements (temperature, pressure, humidity,

light)

Signal Chain Design Guide 7

Remote Sensing

All sensors in a high noise environment should be

considered as remote sensors. Also, sensors not located

on the same PCB as the signal conditioning circuitry

are remote. Remote sensing applications typically use a

differential amplifier or an instrumentation amplifier.

Key Amplifier Features

■



Differential Input

■



Large CMR

■



Small VOS

VOUT

EMI

VRE F

MCP6V02

MCP6V07

MCP617

–

VOUT2

VREF

VSHIFT

–

Using USB

SDA

SCLK

ALERT

Connector

Weld Bead

Type K Thermocouple

VOUT1

MCP1541 4.1V

Voltage Reference

2nd Order RC

Low-Pass Filter

Cold Junction

Compensation

MCP9800

Temp Sensor

(Thermal Management Software)

Difference

Amplifier

10-bit ADC Module

CVREF

PIC18F2550 (USB) Microcontroller

C™ Port

MCP6V01 Thermocouple Auto-zeroed Reference Design (MCP6V01RD-TCPL)

Differential Ampliﬁ er

Remote Sensors

Products

■



High Precision

–

Low Offset Op Amps

–

Auto-zeroed Op Amps

–

Low Noise Op Amps

Sensors and Applications

■



High temperature sensors

– Thermocouples for stoves, engines and process control

– RTDs for ovens and process control

■



Wheatstone Bridges

– Pressure Sensors for automotive and industrial control

– Strain gauges for engines

■



Low side current monitors for motors and batteries

8 Signal Chain Design Guide

RC Operational Amplifier Oscillators

For Sensor Applications

Op Amp or state-variable oscillators can be used to

accurately measure resistive and capacitive sensors.

Oscillators do not require an analog-to-digital converter and

provide a sensor measurement whose conversion to digital

has an accuracy limited only by the reference clock signal.

State-variable oscillators are often used in sensor

conditioning applications because they have a reliable

start-up and a low sensitivity to stray capacitance.

Absolute quartz pressure sensors and humidity sensors

are examples of capacitive sensors that can use the

state-variable oscillator. Also, this circuit can be used with

resistive sensors, such as RTDs, to provide temperature-to-

frequency conversion.

Oscillator Circuits For Sensors

OUT

–

1 =

RTD

2 =

RTD

/2 V

Attributes:

• Precision dual Element RTD

Sensor Circuit

• Reliable Oscillation Startup

• Freq. ∝ (R1 x R2)1/2

MCP6294

MCP6234

MCP6004

MCP6294

MCP6234

MCP6004 MCP6294

MCP6234

MCP6004

VDD

–

MCP6294

MCP6234

MCP6004

MCP6541

MCP6561

1/4 2/4

3/4

4/4

Oscillator Circuits for Sensors

The block diagram below shows a typical system

level design, including the state-variable oscillator,

PIC microcontroller and temperature sensor (used for

temperature correction).

Sensors and Applications

Resistive Sensors

■



RTDs

■



Humidity

■



Thermistors

Capacitive Sensors

■



Humidity

■



Pressure

■



Oil Level

Related Application Notes:

AN895: Oscillator Circuits for RTD Temperature Sensors

AN866: Designing Operational Amplifier Oscillator Circuits

for Sensor Applications

Available on the Microchip web site at: www.microchip.com

Attributes:

• Low Cost Solution

• Single Comparator Circuit

• Square Wave Output

• Freq. = 1/ (1.386 x R1 x C1)

VDD

1 =

RTD

VOUT

MCP6541

MCP6561

–

Oscillator Circuits for Sensors

Signal Chain Design Guide 9

Bridge Sensor Circuit

Sensors for temperature, pressure, load or other phys-

ical excitation quantities are most often configured in a

Wheatstone bridge configuration. The bridge can have

anywhere from one to all four ele ments reacting to the

physical excitation, and should be used in a ratiometeric

configuration when possible, with the system reference

driving both the sensor and the ADC voltage reference. By

using the same reference for both the sensor excitation and

ADC, the variation in the reference can be cancelled out.

Furthermore, the output voltage from the bridge sensor is

proportional to the excitation voltage. Therefore, the ADC

that is using the external reference is more popular than

the ADC that is using internal reference, for the ratiometric

configuration.

One example sensor from GE NovaSensor is an absolute

pressure sensor, shown below, a four element varying

bridge. This example uses the MCP355X family of delta

sigma ADCs. When designing with the MCP355X family

of 22-bit delta-sigma ADCs, the initial step should be to

evaluate the sensor perfor mance and then determine what

steps (if any) should be used to increase the overall system

resolution when using the MCP355X. In many situations, the

MCP355X devices can be used to directly digitize the sensor

out put, eliminating any need for external signal condition ing

circuitry.

Using the absolute pressure sensor as our Wheatstone

bridge example, the NPP-301 device has a typical full

scale output of 60 mV when excited with a 3V battery. The

pressure range for this device is 100 kPa. The MCP3551

has a output noise speciﬁ cation of 2.5 VRMS.

The following equation is a ﬁ rst order approximation of the

relation ship between pressure in pascals (P) and altitude (h),

in meters.

log(P) ≈ 5 –

Using 60 mV as the full scale range and 2.5 V as the

resolution, the resulting resolution from direct digitiza tion in

meters is 0.64 meters or approximately 2 feet.

It should be noted that this is only used as an example for

discussion; temperature effects and the error from a ﬁ rst

order approximation must be included in ﬁ nal sys tem design.

15500

R2SPI

VREF

SCK

SDO

MCP3551

Altimeter Watch

5, 6, 7

VSS

VIN+

VIN-

To VDD

VDD

0.1 μF 1.0 μF

NPP-301

R3MCU

∆V ~ [(∆R

+ ∆R

) - (∆R

+∆R

)]/4R * V

With R

= R

Example of Wheatstone Bridge Sensor Configuration with High Resolution Delta-Sigma ADC

Wheatstone Bridge

10 Signal Chain Design Guide

MCP3422 Analog-to-Digital Converter (ADC) Feature Summary

Bit Resolution 18 bits (User can select 18-, 16-,

14- or 12-bit options)

Number of Differential Input

Channels 2

Internal Programmable Gain

Amplifier x1, x2, x4 or x8 (user option)

INL Error (Typical) 10 PPM of full scale range

Offset Error (Typical) 15 µV

Internal Reference Voltage 2.048V

Output Noise (Typical) 1.5 µVrms

Gain Error (Typical) 0.05% of full scale range

Interface I2C™

Voltage and Current Measurment Using

Delta-Sigma ADCs

The MCP342X family devices are easy-to-use high precision

delta sigma ADC devices from Microchip. These devices have

an internal reference (2.048V) with a user programmable

PGA (x1, x2, x4, x8). The ADC resolution is programmable as

12-bit, 14-bit, 16-bit or 18-bit by the user.

This ADC family offers single, dual and four differential

input channels. Because of its simplicity and low price, this

device family can be used for various applications from

simple voltage and current measurement to high precision

temperature measurement.

Voltage Measurement Using MCP3421 Device

(a) If V

REF

< V

BAT

ADC

VBAT

–

(b) If V

REF

> V

BAT

= ( ________ ) ● (V

BAT

)

R1 + R2

VMeasured = ADC Output Codes ● LSB ● _________ ● _____

(R1 + R2)

PGA

–1

LSB = ________________

Reference Voltage

2.048V

217

–1

LSB of 18-bit ADC = ________________ = ______ = 15.625 μV

Reference Voltage

ADC

VBAT

–

MCP3421MCP3421

MCU MCU

Delta-Sigma ADCs

Current = (Measured Voltage)/(Known Resistance Value of Current Sensor)

Direction of current is determined by sign bit (MSB bit) of the ADC output code.

ADC

Battery

Charging

Current

Discharging

Current

Current Sensor To Load

–

MCP3421

MCU

Current Measurement Using MCP3421 Device

MCP3421

–

(Thermocouple)

Heat

PIC

MCU

18-bit ∆

∑

ADC

2.4 GHz

MRF24J40

MCP9804

Temp Sensor

±1°C

Wireless Temperature Monitoring Solution

Signal Chain Design Guide 11

MCP3424

Delta-Sigma ADC

VDD

SCL

SDA

Isothermal Block

(Cold Junction)

Thermocouple Sensor

Heat

SCL

0.1 μF

10 μF

SCL

SDA

VDD

5 kΩ

To MCU

SDA

SCL

SDA

SCL

CH1+

CH1-

CH2+

CH2-

SDA

CH4-

CH4+

CH3-

CH3+

Adr1

Adr0

SCL

5 kΩ

SDA

Isothermal Block

(Cold Junction)

MCP9804 MCP9804

MCP9804

Temperature Measurements Using 4 Channel ADC (MCP3424)

See Thermocouple Reference Design (TMPSNSRD-TCPL1)

Delta-Sigma ADCs

12 Signal Chain Design Guide

RTD Solution

Resistive Temperature Detectors (RTDs) are highly accurate

and repeatable temperature sensing elements. When

using these sensors a robust instrumentation circuit is

required and it is typically used in high performance thermal

management applications such as medical instrumentation.

This solution uses a high performance Delta-Sigma Analog-

to-Digital converter, and two resistors to measure RTD

resistance ratiometrically. A ±0.1°C accuracy and ±0.01°C

measurement resolution can be achieved across the RTD

temperature range of -200°C to +800°C with a single point

calibration.

This solution uses a common reference voltage to bias

the RTD and the ADC which provides a ratio-metric relation

between the ADC resolution and the RTD temperature

resolution. Only one biasing resistor, RA, is needed to set the

measurement resolution ratio (shown in equation below).

For instance, a 2V ADC reference voltage (VREF) results in

a 1V/LSb (Least Signiﬁ cant Bit) resolution. Setting RA=

RB=6.8 k provides 111.6 V/°C temperature coefﬁ cient

(PT100 RTD with 0.385/°C temperature coefﬁ cient). This

provides 0.008°C/LSb temperature measurement resolution

for the entire range of 20 to 320 or -200°C to +800°C. A

single point calibration with a 0.1% 100 resistor provides

±0.1°C accuracy as shown in the ﬁ gure below.

This approach provides a plug-and-play solution with

minimum adjustment. However, the system accuracy

depends on several factors such as the RTD type, biasing

circuit tolerance and stability, error due to power dissipation

or self-heat, and RTD non-linear characteristics.

Thermistor Solutions

Typically, thermistors require an external resistor for biasing.

In addition, the inherent non-linearity of a thermistor is

improved by biasing the thermistor in a resistive ladder

circuit to linearize the temperature-to-voltage conversion.

Typically, the thermistor voltage is directly connected to an

ADC to digitize the voltage measurement. The measured

voltage is converted to temperature using a lookup table.

However, at hot and cold temperature extremes the non-

linearity of this approach is much greater with reduced

change in voltage, which results in lower accuracy. This

requires higher resolution and a more costly ADC.

The solution is to use Microchip’s Linear Active Thermistors,

the MCP9700 and MCP9701. These are low-cost voltage

output temperature sensors that replace almost any

Thermistor application solutions. Unlike resistive type

sensors such as Thermistors, the signal conditioning

and noise immunity circuit development overhead can be

avoided by using the low-cost Linear Active Thermistors.

These sensors output voltage is proportional to ambient

temperature with temperature coefﬁ cient of 10 mV/°C and

19.5 mV/°C. Unlike thermistors, these devices do not require

additional computation for temperature measurement.

The factory set coefﬁ cients provide linear interface to

measure ambient temperatures (refer to AN1001 for sensor

optimization).

MCP9700 and MCP9701 Key Features

■SC70, TO92 packages

■Operating temperature range: -40°C to +150°C

■Temperature Coefﬁ cient: 10 mV/°C (MCP9700)

■Temperature Coefﬁ cient: 19.5 mV/°C (MCP9701)

■Low power: 6 µA (typ.)

Applications

■ Refrigeration equipment

■ Power supply over temperature protection

■ General purpose temperature monitoring

Thermistor and RTD Solutions

Measured Accuracy (°C)

-200 0

Temperature (°C)

600400200

0.1

0.05

-0.05

-0.1

800

REF

1 μF

MCP3551

–

RTD

RB 5%

RA 1%

REF

SPI

LDO

C* C*

*See LDO Data Sheet at: www.microchip.com/LDO

PIC

MCU

Code

RRTD = RA (2n – 1 – Code)

Where:

Code = ADC output code

A = Biasing resistor

n = ADC number of bits

(22 bits with sign, MCP3551)

RTD Resistance

RTD Instrumentation Circuit Block Diagram and Output Performance (see Application Note AN1154)

Signal Chain Design Guide 13

Equation 1-1 shows how to calcultate the gain for the

simpliﬁ ed circuit (Figure 1-1b). The gain is the ratio of the

digital potentiometers wiper position on the RAB resistor

ladder. As the wiper moves away from the midscale value,

the gain will either become greater then one (as wiper moves

towards Terminal A), or less then one (as wiper moves

towards Terminal B).

The device’s wiper resistance (RW) is ignored for ﬁ rst order

calculations. This is due to it being in series with the op amp

input resistance and the op amp input impedence is very

large.

Programmable Gain Using Digital Potentiometers

Programmable Ampliﬁ er Gain Using a

Digital Potentiometer

Many sensors require their signal to be ampliﬁ ed before

being converted to a digital representation. This signal gain

may be done with and operational ampliﬁ er. Since all sensors

will have some variation in their operational characteristics,

it may be desireable to calibrate the gain of the operational

ampliﬁ er to ensure an optimal output voltage range.

The ﬁ gure below shows two inverting ampliﬁ er with

programmable gain circuits. The generic circuit (a) where R1,

R2, and Pot1 can be used to tune the gain of the inverting

ampliﬁ er, and the simpliﬁ ed circuit (b) which removes

resistors R1 and R2 and just uses the digital potentiometers

RAW and RBW ratio to control the gain.

The simpliﬁ ed circuit reduces the cost and board area but

there are trade-offs (for the same resistance and resolution),

Using the R1 and R2 resistors allows the range of the gain

to be limited and therefore each digital potentiometer step

is a ﬁ ne adjust within that range. While in the simpliﬁ ed

circuit, the range is not limited and therefore each digital

potentiometer step causes a larger variation in the gain.

The feedback capacitor (CF) is used for circuit stability.

Generic Circuit (a)

Pot

OUT

Simplified Circuit (b)

Pot

OUT

Note 1: A general purpose op amp, such as the MCP6001.

Op Amp

(1)

–

Op Amp

(1)

–

Inverting Amplifier with Programmable Gain Circuits

Circuit Gain Equation

VOUT = – RBW x VIN

RAW

RBW = RAB x Wiper Code

# of Resistors

RAW = # of Resistors – Wiper Code x RAB

# of Resistors

14 Signal Chain Design Guide

The table below shows a comparison of the gain between the

circuits (a and b) in Figure 1-1 when using the same Digital

Potentiometer (10 k, 7-bit). What you also see is that

when R1 = R2 = 10 k, the circuit’s gain range is between 1

and 3. While when the simpliﬁ ed circuit is used (effectively

having R1 = R2 = 0) the circuit’s gain range is between ~0

and >127. Therefore the capability for ﬁ ner calibration of

the circuit is capable with the generic circuit, albeit with a

narrower range.

Some devices have an even number of step resistors (RS)

in the RAB string, while others have an odd number. In

the simpliﬁ ed circuit, devices with an even number of RS

resistors have a mid-scale wiper value that is unity gain.

Amplifier Gain vs. Wiper Code and RW

# of

Taps

# of

Resistors

Wiper

Code

10 kΩ Gain

Comment

Simplified Circuit(1) Generic Circuit(1, 2)

129 128

0 0.0 1.000000 Zero Scale

1 0.007874 1.007843

2 0.015873 1.015748

3 0.024000 1.023715

4 0.032258 1.031746

62 0.939394 1.639175

63 0.969231 1.652850

64 1.000000 1.666667 Mid Scale

65 1.031746 1.680628

66 1.064516 1.694737

124 31.000000 2.878788

125 41.666667 2.908397

126 63.000000 2.938462

127 127.000000 2.968992

128 Divide Error(3) 3.000000 Full Scale

Note 1: Gain = ( (RAB / # of Resistors) * Wiper Code ) /( ( (# of Resistors - Wiper Code) / # of Resistors) * RAB)

2: Uses R1 = R2 = 10 k.

3: Theoretical calculations. At full scale in the simplified circuit a divide by 0 error results.

Programmable Gain Using Digital Potentiometers

For devices with an odd number of RS resistors have a mid-

scale wiper value that is near unity gain. The MCP4261 is an

example of a device that has an even number of RS resistors

in the RAB string, while the MCP4011 is an example of a

device that has an odd number of RS resistors in the RAB

string.

For devices with an odd number of RS resistors in the RAB

string to be able to have an exact unity gain, the device

would need to be used in the generic circuit conﬁ guration

(Figure 1-1), and the components would need to be selected

so R1 + RAW could equal R2 + RBW.

Signal Chain Design Guide 15

Setting the DC Set Point for Sensor Circuit

A common DAC application is digitally controlling the set

point and/or calibration of parameters in a signal chain. The

ﬁ gure below shows controlling the DC set point of a light

detector sensor using the MCP4728 12-bit quad DAC device.

The DAC provides 4096 output steps. If G = 1 and internal

reference voltage options are selected, then the internal

2.048 VREF would produce 500 µV of resolution. If G = 2 is

selected, the internal 2.048 VREF would produce 1 mV of

resolution. If a smaller output step size is desired, the output

range would need to be reduced. So, using gain of 1 is a

better choice than using gain of 2 conﬁ guration option for

smaller step size, but its full-scale range is one half of that

of the gain of 2. Using a voltage divider at the DAC output is

another method for obtaining a smaller step size.

Sensor Circuit Calibration using a DAC

LDAC

VDD

OUT

SCL

SDA

RDY/BSY

0.1 μF

Analog Outputs

10 μF

To MCU

Comparator 1

Light

VDD

VTRIP1

0.1 μF

Comparator 2

Light

VDD

VTRIP2

0.1 μF

Comparator 3

Light

VDD

VTRIP3

0.1 μF

Comparator 4

Light

VDD

VTRIP4

0.1 μF

⎧

⎨

⎩

OUT

= V

REF

x Dn G

TRIP

= V

OUT

+ R

Where Dn = Input Code (0 to 4095)

= Gain Selection (x1 or x2)

4096

Quad DAC

RSENSE

MCP6544(1/4)

RSENSE

MCP6544(2/4)

RSENSE

MCP6544(3/4)

RSENSE

MCP6544(4/4)

–

MCP4728

–

Setting the DC Set Point

16 Signal Chain Design Guide

Mindi™ Amplifier Designer & Simulator

Mindi™ Ampliﬁ er Designer & Simulator

The Mindi Ampliﬁ er Designer & Simulator is an Application

Circuit that generates full schematic diagrams of an ampliﬁ er

circuit with recommended component values and displays

the signal responses in frequency and time domains.

This application circuit allows the following designs:

■Inverting Ampliﬁ er

■Non-inverting Ampliﬁ er

■Voltage Follower

■Difference Ampliﬁ er

■Inverting Summing Ampliﬁ er

■Inverting Comparator

■Inverting Differentiator

■Inverting Integrator

Once the ampliﬁ er characteristics have been identiﬁ ed,

the Mindi Ampliﬁ er Designer & Simulator can generate and

simulate the schematic of the ampliﬁ er circuit. For maximum

design ﬂ exibility, changes in resistor and capacitor values

can be implemented to ﬁ t the demands of the application.

The tool also generates a Design Summary of the designed

ampliﬁ er, including Design Requirements, Application

Schematic, Result Plot and Bill of Materials (BOM). Users

can directly download the schematic, BOM and Mindi ofﬂ ine

version.

Mindi™ Active Filter Designer & Simulator

The Mindi Active Filter Designer & Simulator is an Application

Circuit within the Mindi Circuit Designer & Simulator that

provides full schematic diagrams of the active ﬁ lter circuit

with recommended component values and displays the signal

responses in frequency and time domains.

The Mindi Active Filter Designer & Simulator allows the

design of low-pass ﬁ lters up to an 8th order ﬁ lter with

Chebychev, Bessel or Butterworth approximations from

frequencies of 0.1 Hz to 1 MHz. It also can be used to

design band-pass and high-pass ﬁ lters with Chebychev and

Butterworth approximations. The circuit topologies supported

by the tool are the Sallen Key and Multiple Feedback (MFB).

The low-pass ﬁ lters can use either the Sallen Key or MFB, the

band-pass ﬁ lter is available with the MFB and the high-pass

ﬁ lter uses the Sallen Key.

Users can select a ﬂ at pass-band or sharp transition from

pass-band to stop-band. Other options, such as minimum

ripple factor, sharp transition and linear phase delays are

available. Once the ﬁ lter characteristics have been identiﬁ ed,

the Mindi Active Filter Designer & Simulator can generate

and simulate the schematic of ﬁ lter circuit. For maximum

design ﬂ exibility, changes in resistor and capacitor values can

be implemented to ﬁ t the demands of the application. The

tool will recalculate all values to meet the desired response,

allowing real-world values to be substituted or changed as

part of the design process. The tool also generates a Bill of

Materials (BOM) of the designed ﬁ lter.

Both of these tools are available on the Microchip web site

(www.microchip.com) under “Design & Simulation Tools” or

on the Mindi home page (http://www.microchip.com/mindi).

The op amps and evaluation boards can also be ordered

from the Microchip web site.

Signal Chain Design Guide 17

DACs

MCP4725 PICtail™ Plus Daughter Board

(MCP4725DM-PTPLS)

This daughter board demonstrates the

MCP4725 (12 bit DAC with non-volatile

memory) features using the Explorer 16

Development Board and the PICkit Serial

Analyzer.

MCP4725 SOT-23-6 Evaluation Board (MCP4725EV)

The MCP4725 SOT-23-6 Evaluation Board

is a quick and easy evaluation tool for

the MCP4725 12-bit DAC device. It works

with Microchip’s popular PICkit™ Serial

Analyzer or independently with the customer’s applications

board. The PICkit Serial Analyzer is sold separately.

MCP4728 Evaluation Board (MCP4728EV)

The MCP4728 Evaluation Board is a tool for quick

and easy evaluation of the MCP4728 4-channel

12-bit DAC device. It contains the MCP4728

device and connection pins for the Microchip’s

popular PICkit™ SerialAnalyzer. The PICkit Serial

Analyzer is sold separately.

Op Amps

MCP6031 Photodiode PICtail™ Plus Demo Board

(MCP6031DM-PTPLS)

The MCP6031 Photodiode PICtail Plus

Demo Board demonstrates how to use a

transimpedance amplifier, which consists of

MCP6031 high precision op amp and external

resistors, to convert photo-current to voltage.

MCP651 Input Offset Evaluation Board

(MCP651EV-VOS)

The MCP651 Input Offset Evaluation

Board is intended to provide a simple

means to measure the MCP651 Input

Offset Evaluation Board op amp’s input

offset voltage under a variety of operating

conditions. The measured input offset voltage (VOST) includes

the input offset voltage specified in the data sheet (VOS)

plus changes due to: power supply voltage (PSRR), common

mode voltage (CMRR), output voltage (AOL), input offset

voltage drift over temperature (∆VOS/∆TA) and 1/f noise.

Development Tools

These following development boards support the the

development of signal chain applications. These product

families may have other demonstration and evaluation

boards that may also be useful. For more information visit

www.microchip.com/analogtools

ADCs

MCP3421 Battery Fuel Gauge Demo

(MCP3421DM-BFG)

The MCP3421 Battery Fuel Gauge Demo

Board demonstrates how to measure the

battery voltage and discharging current

using the MCP3421. The MCU algorithm

calculates the battery fuel being used.

This demo board is shipped with 1.5V AAA non-rechargeable

battery. The board can also charge a single-cell 4.2V Li-Ion

battery.

MCP3551 Tiny Application (Pressure) Sensor Demo

(MCP355XDM-TAS)

This 1˝ x 1˝ board is designed to

demonstrate the performance of the

MCP3550/1/3 devices in a simple low-cost

application. The circuit uses a ratiometric

sensor configuration and uses the system

power supply as the voltage reference. The

extreme common mode rejection capability of the MCP355X

devices, along with their excellent normal mode power

supply rejection at 50 and 60 Hz, allows for excellent system

performance.

MCP3551 Sensor Application Developer’s Board

(MCP355XDV-MS1)

The MCP355X Sensor Developer’s Board

allows for easy system design of high

resolution systems such as weigh scale,

temperature sensing, or other small

signal systems requiring precise signal

conditioning circuits. The reference design includes LCD

display firmware that performs all the necessary functions

including ADC sampling, USB communication for PC data

analysis, LCD display output, zero cancellation, full scale

calibration, and units display in gram (g), kilogram (kg) or

ADC output units.

MCP3901 ADC Evaluation Board for 16-bit MCUs

(MCP3901EV-MCU16)

The MCP3901 ADC Evaluation Board for

16-bit MCUs system provides the ability to

evaluate the performance of the MCP3901

dual channel ADC. It also provides a

development platform for 16-bit PIC based

applications, using existing 100-pin PIM

systems.

18 Signal Chain Design Guide

MCP6V01 Input Offset Demo Board

(MCP6V01DM-VOS)

The MCP6V01 Input Offset Demo Board

is intended to provide a simple means to

measure the MCP6V01/2/3 op amps input

offset voltage (VOS) under a variety of bias

conditions. This VOS includes the specified

input offset voltage value found in the data

sheet plus changes due to power supply voltage (PSRR),

common mode voltage (CMRR), output voltage (AOL) and

temperature (IVOS/ITA).

MCP661 Line Driver Demo Board (MCP661DM-LD)

This demo board uses the MCP661 in a

very basic application for high speed op

amps; a 50Ω line (coax) driver. The board

offers a 30 MHz solution, high speed PCB

layout techniques and a means to test AC response, step

response and distortion. Both the input and the output are

connected to lab equipment with 50 BNC cables. There

are 50 terminating resistors and transmission lines on the

board. The op amp is set to a gain of 2V/V to overcome the

loss at its output caused by the 50 resistor at that point.

Connecting lab supplies to the board is simple; there are

three surface mount test points provided for this purpose.

Amplifier Evaluation Board 1

(MCP6XXXEV-AMP1)

The MCP6XXX Amplifier Evaluation Board 1

is designed to support inverting/

non-inverting amplifiers, voltage followers,

inverting/non-inverting comparators,

inverting/non-inverting differentiators.

Amplifier Evaluation Board 2

(MCP6XXXEV-AMP2)

The MCP6XXX Amplifier Evaluation Board 2

supports inverting summing amplifiers and

non-inverting summing amplifiers.

Amplifier Evaluation Board 3

(MCP6XXXEV-AMP3)

The MCP6XXX Amplifier Evaluation Board

3 is designed to support the difference

amplifier circuits which are generated by the

Mindi™ Amplifier Designer.

Amplifier Evaluation Board 4

(MCP6XXXEV-AMP4)

The MCP6XXX Amplifier Evaluation Board

4 is designed to support the inverting

integrator circuit.

Thermocouple Reference Design (TMPSNSRD-TCPL1)

The Thermocouple Reference

Design demonstrates how to

instrument a Thermocouple and

accurately sense temperature over

the entire Thermocouple measurement range. This solution

uses the MCP3421 18-bit Analog-to-Digital Converter (ADC)

to measure voltage across the Thermocouple.

MCP6V01 Thermocouple Auto-Zero Reference Design

(MCP6V01RD-TCPL)

The MCP6V01 Thermocouple Auto-Zeroed

Reference Design demonstrates how to use

a difference amplifier system to measure

electromotive force (EMF) voltage at the

cold junction of thermocouple in order to accurately measure

temperature at the hot junction. This can be done by using

the MCP6V01 auto-zeroed op amp because of its ultra low

offset voltage (VOS) and high common mode rejection ratio

(CMRR).

MCP6XXX Active Filter Demo (MCP6XXXDM-FLTR)

This kit supports Mindi™ Active Filter

Designer & Simulator and active filters

are all pole and are built by cascading

first and second order sections.

Temp Sensors

MCP9800 Temp Sensor Demo Board

(MCP9800DM-TS1)

The MCP9800 Temperature Sensor

Demo Board demonstrates the sensor’s

features. Users can connect the demo

board to a PC with USB interface and

evaluate the sensor performance. The

7-Segment LED displays temperature in degrees Celsius or

degrees Fahrenheit; the temperature alert feature can be

set by the users using an on board potentiometer. An alert

LED is used to indicate an over temperature condition. In

addition, temperature can be datalogged using the Microchip

Thermal Management Software Graphical User Interface

(GUI). The sensor registers can also be programmed using

the GUI.

MCP6S26 PT100 RTD Evaluation Board

(TMPSNS-RTD1)

The PT100 RTD Evaluation Board

demonstrates how to bias a Resistive

Temperature Detector (RTD) and

accurately measure temperature. Up

to two RTDs can be connected. The

RTDs are biased using constant current source and the

output voltage is scaled using a difference amplifier. In

addition to the difference amplifier, a multiple input channel

Programmable Gain Amplifier (PGA) MCP6S26 is used to

digitally switch between RTDs and increase the scale up to

32 times.

Development Tools

Signal Chain Design Guide 19

RTD Reference Design Board (TMPSNSRD-RTD2)

The RTD Reference Design demonstrates how to implement

Resistive Temperature Detector (RTD) and accurately

measure temperature. This solution uses the MCP3551

22-bit Analog-to-Digital Converter (ADC) to measure voltage

across the RTD. The ADC and the RTD are referenced using

an onboard reference voltage and the ADC inputs are directly

connected to the RTD terminals. This provides a ratio metric

temperature measurement. The solution uses a current

limiting resistor to bias the RTD. It provides a reliable and

accurate RTD instrumentation without the need for extensive

circuit com pensation and calibration routines.

In addition, the this reference design includes a silicon

temperature sensor, MCP9804. This sensor is used for

comparison only, it is not needed to instrument an RTD. The

MCP3551 and MCP9804 outputs are read using a USB PIC

microcontroller. This controller is also connected to a PC

using USB interface. The thermal management software is

used plot the RTD temperature data in stripchart format.

Thermocouple Reference Design Board

(TMPSNSRD-TCPL1)

The Thermocouple Reference Design demonstrates how

to implement a thermocouple and accurately sense

temperature over the entire thermocouple measurement

range. This solution uses the MCP3421 18-bit Analog-

to-Digital Converter (ADC) to measure voltage across the

Thermocouple. The ADC has an internal 2.048V reference

voltage and a Programmable Gain Amplifier with 1, 2, 4,

8V/V. At a Gain of 8 V/V the PGA effec tively adds 3 LSb

to the ADC. This increases the ADC resolution to 21-bit

or 2 μV/LSb. Therefore, the Thermocouple EMF voltage is

measured with 2 μV resolution. For K-type thermocouple,

measurement system provides a ±0.05°C resolution. The

cold-junction compensation is done using a ±1°C accurate

0.0625°C resolution silicon temperature sensor, the

MCP9804. This solution provides a reliable and accurate

Thermocouple instrumentation without the need for

extensive circuit compensation and calibration routines.

Development Tools

20 Signal Chain Design Guide

Related Support Material

The following literature is available on the Microchip web

site: www.microchip.com/appnotes. There are additional

application notes that may be useful.

Sensor Conditioning Circuits Overview

AN866: Designing Operational Amplifier Oscillator Circuits

For Sensor Applications

Operational amplifier (op amp) oscillators can be used

to accurately measure resistive and capacitive sensors.

Oscillator design can be simplified by using the procedure

discussed in this application note. The derivation of the

design equations provides a method to select the passive

components and determine the influence of each component

on the frequency of oscillation. The procedure will be

demonstrated by analyzing two state-variable RC op-amp

oscillator circuits.

AN895: Oscillator Circuits for RTD Temperature Sensors

This application note shows how to design a temperature

sensor oscillator circuit using Microchip’s low-cost

MCP6001 operational amplifier (op amp) and the MCP6541

comparator. Oscillator circuits can be used to provide

an accurate temperature measurement with a Resistive

Temperature Detector (RTD) sensor. Oscillators provide a

frequency output that is proportional to temperature and are

easily integrated into a microcontroller system.

AN990: Analog Sensor Conditioning Circuits – An Overview

Analog sensors produce a change in an electrical property

to indicate a change in its environment. this change in

electrical property needs to be conditioned by an analog

circuit before conversion to digital. Further processing occurs

in the digital domain but is not addressed in this application

note.

Delta-Sigma ADCs

AN1007: Designing with the MCP3551 Delta-Sigma ADC

The MCP3551 delta-sigma ADC is a high-resolution

converter. This application note discusses various design

techniques to follow when using this device. Typical

application circuits are discussed first, followed by a section

on noise analysis.

AN1030: Weigh Scale Applications for the MCP3551

This application note focusses specifically on load cells,

a type of strain gauge that is typically used for measuring

weight. Even more specifically, the focus is on fully active,

temperature compensated load cells whose change in

differential output voltage with a rated load is 2 mV to

4 mV per volt of excitation (the excitation voltage being the

difference between the +Input and the –Input terminals of

the load cell).

AN1156: Battery Fuel Measurement Using Delta-Sigma

ADC Devices

This application note reviews the battery fuel measurement

using the MCU and ADC devices. Developing battery fuel

measurement in this manner provides flexible solutions and

enables economic management.

DS21841: Analog-to-Digital Converter Design Guide

SAR ADCs

AN246: Driving the Analog Inputs of a SAR A/D Converter

This application note delves into the issues surrounding the

SAR converter’s input and conversion nuances to insure that

the converter is handled properly from the beginning of the

design phase.

AN688: Layout Tips for 12-Bit A/D Converter Application

This application note provides basic 12-bit layout guidelines,

ending with a review of issues to be aware of. Examples of

good layout and bad layout implementations are presented

throughout.

AN693: Understanding A/D Converter Performance

Specifications

This application note describes the specifications used to

quantify the performance of A/D converters and give the

reader a better understanding of the significance of those

specifications in an application.

AN842: Differential ADC Biasing Techniques, Tips and

Tricks

True differential converters can offer many advantages over

single-ended input A/D Converters (ADC). In addition to their

common mode rejection ability, these converters can also be

used to overcome many DC biasing limitations of common

signal conditioning circuits.

AN845: Communicating With The MCP3221 Using

PIC Microcontrollers

This application note will cover communications between the

MCP3221 12-bit A/D Converter and a PIC microcontroller.

The code supplied with this application note is written as

relocatable assembly code.

Passive Keyless Entry (PKE)

TB090: MCP2030 Three-Channel Analog Front-End Device

Overview

This tech brief summarizes the technical features of the

MCP2030 and describes how the three channel stand-alone

analog front-end device can be used for various bidirectional

communication applications.

AN1024: PKE System Design Using the PIC16F639

This application note described how to make hands-free

reliable passive keyless entry applications using the

PIC16F639 – a dual die solution device that includes both

MCP2030 and PIC16F636.

Utility Metering

Refer to DS01008: Utility Metering Solutions

Signal Chain Design Guide 21

Digital Potentiometers

AN691: Optimizing the Digital Potentiometer in Precision

Circuits

In this application note, circuit ideas are presented that

use the necessary design techniques to mitigate errors,

consequently optimizing the performance of the digital

potentiometer.

AN692: Using a Digital Potentiometer to Optimize a

Precision Single Supply Photo Detect

This application note shows how the adjustability of the

digital potentiometer can be used to an advantage in

photosensing circuits.

AN1080: Understanding Digital Potentiometer Resistance

Variations

This application note discusses how process, voltage and

temperature effect the resistor network’s characteristics,

specifications and techniques to improve system

performance.

Op Amps

AN679: Temperature Sensing Technologies

Covers the most popular temperature sensor technologies

and helps determine the most appropriate sensor for an

application.

AN681: Reading and Using Fast Fourier Transformation

(FFT)

Discusses the use of frequency analysis (FFTs), time

analysis and DC analysis techniques. It emphasizes Analog-

to-Digital converter applications.

AN684: Single Supply Temperature Sensing with

Thermocouples

Focuses on thermocouple circuit solutions. It builds from

signal conditioning components to complete application

circuits.

AN695: Interfacing Pressure Sensors to Microchip’s

Analog Peripherals

Shows how to condition a Wheatstone bridge sensor using

simple circuits. A piezoresistive pressure sensor application

is used to illustrate the theory.

AN699: Anti-Aliasing, Analog Filters for Data Acquisition

Systems

A tutorial on active analog filters and their most common

applications.

AN722: Operational Amplifier Topologies and

DC Specifications

Defines op amp DC specifications found in a data sheet. It

shows where these specifications are critical in application

circuits.

AN723: Operational Amplifier AC Specifications and

Applications

Defines op amp AC specifications found in a data sheet. It

shows where these specifications are critical in application

circuits.

AN866: Designing Operational Amplifier Oscillator Circuits

For Sensor Applications

Gives simple design procedures for op amp oscillators.

These circuits are used to accurately measure resistive and

capacitive sensors.

AN884: Driving Capacitive Loads With Op Amps

Explains why all op amps tend to have problems driving

large capacitive loads. A simple, one resistor compensation

scheme is given that gives much better performance.

AN951: Amplifying High-Impedance Sensors –

Photodiode Example

Shows how to condition the current out of a high-impedance

sensor. A photodiode detector illustrates the theory.

AN990: Analog Sensor Conditioning Circuits – An Overview

Gives an overview of the many sensor types, applications

and conditioning circuits.

AN1014: Measuring Small Changes in Capacitive Sensors

This application note shows a switched capacitor circuit that

uses a PIC microcontroller, and minimal external passive

components, to measure small changes in capacitance. The

values are very repeatable under constant environmental

conditions.

AN1016: Detecting Small Capacitive Sensors Using the

MCP6291 and PIC16F690 Devices

The circuit discussed here uses an op amp and a

microcontroller to implement a dual slope integrator and

timer. It gives accurate results, and is appropriate for small

capacitive sensors, such as capacitive humidity sensors.

AN1177: Op Amp Precision Design: DC Errors

This application note covers the essential background

information and design theory needed to design a precision

DC circuit using op amps.

AN1228: Op Amp Precision Design: Random Noise

This application note covers the essential background

information and design theory needed to design low noise,

precision op amp circuits. The focus is on simple, results

oriented methods and approximations useful for circuits with

a low-pass response.

AN1258: Op Amp Precision Design: PCB Layout Techniques

This application note covers Printed Circuit Board (PCB)

effects encountered in high (DC) precision op amp circuits.

It provides techniques for improving the performance,

giving more flexibility in solving a given design problem. It

demonstrates one important factor necessary to convert a

good schematic into a working precision design.

AN1297: Microchip’s Op Amp SPICE Macro Models

This application note covers the function and use of

Microchip’s op amp SPICE macro models. It does not explain

how to use the circuit simulator but will give the user a

better understanding how the model behaves and tips on

convergence issues.

Related Support Material

22 Signal Chain Design Guide

Related Support Material

Programmable Gain Amplifier (PGA)

AN248: Interfacing MCP6S2X PGAs to PIC

Microcontrollers

This application note shows how to program the six channel

MCP6S26 PGA gains, channels and shutdown registers

using the PIC16C505 microcontroller.

AN865: Sensing Light with a Programmable Gain Amplifier

This application notes discusses how Microchip’s

Programmable Gain Amplifiers (PGAs) can be effectively

used in position photo sensing applications minus the

headaches of amplifier stability.

AN897: Thermistor Temperature Sensing with MCP6SX2

PGAs

Shows how to use a Programmable Gain Amplifier (PGA) to

linearize the response of a thermistor, and to achieve a wider

temperature measurement range.

Temperature Sensing

AN929: Temperature Measurement Circuits for Embedded

Applications

This application note shows how to select a temperature

sensor and conditioning circuit to maximize the

measurement accuracy and simplify the interface to the

microcontroller.

AN981: Interfacing a MCP9700 Analog Temperature

Sensor to a PIC Microcontroller

Analog output silicon temperature sensors offer an easy-

to-use alternative to traditional temperature sensors, such

as thermistors. The MCP9700 offers many system-level

advantages, including the integration of the temperature

sensor and signal-conditioning circuitry on a single chip.

Analog output sensors are especially suited for embedded

systems due to their linear output. This application note

will discuss system integration, firmware implementation

and PCB layout techniques for using the MCP9700 in an

embedded system.

AN988: Interfacing a MCP9800 I2C™ Digital Temperature

Sensor to a PIC Microcontroller

This application note will discuss system integration,

firmware implementation and PCB layout techniques for

using the MCP9800 in an embedded system.

AN1001: IC Temperature Sensor Accuracy Compensation

with a PIC Microcontroller

This application note derives an equation that describes

the sensor’s typical non-linear characteristics, which can be

used to compensate for the sensor’s accuracy error over the

specified operating temperature range.

AN1154: Precision RTD Instrumentation for Temperature

Sensing

Precision RTD (Resistive Temperature Detector)

instrumentation is key for high performance thermal

management applications. This application note shows

how to use a high resolution Delta-Sigma Analog-to-

Digital converter, and two resistors to measure RTD

resistance ratiometrically. A ±0.1°C accuracy and ±0.01°C

measurement resolution can be achieved across the RTD

temperature range of -200°C to +800°C with a single point

calibration.

AN1306: Thermocouple Circuit Using MCP6V01 and

PIC18F2550

This application note shows how to use a difference

amplifier system to measure electromotive force (EMF)

voltage at the cold junction of thermocouple in order to

accurately measure temperature at the hot junction. This

can be done by using the MCP6V01 auto-zeroed op amp

because of its extremely low input offset volt age (VOS)

and very high common mode rejection ratio (CMRR).

The microcontroller PIC18F2550 used in this circuit

has internal comparator voltage reference (CVREF). This

solution minimizes cost by using resources internal to the

PIC18F2550 to achieve rea sonable resolution without an

external ADC.

Signal Chain Design Guide 23

LINEAR

LINEAR – Op Amps

Device # per

Package

GBWP

(kHz)

Typ.

(A/amp.)

Typ.

VOS

(±V)

Max.

Supply

Voltage

(V)

Temperature

Range (°C)

Rail-

to-Rail

I/O

Features Packages Featured Demo Board Op Amp Category

MCP6031/2/3/4 1,2,1,4 10 1 150 1.8 to 5.5 -40 to +125 I/O Low Power Mode on MCP6033 SOIC, MSOP, TSSOP, DFN,

SOT-23 MCP6031DM-PCTL,

SOIC8EV, SOIC14EV Low Offset, Low Power

MCP6041/2/3/4 1,2,1,4 14 1 3,000 1.4 to 6.0 -40 to +85,

-40 to +125 I/O Low Power Mode on MCP6043 PDIP, SOIC, MSOP, TSSOP,

SOT-23 SOIC8EV, SOIC14EV General Purpose, Low Power

MCP6141/2/3/4 1,2,1,4 100 1 3,000 1.4 to 6.0 -40 to +85,

-40 to +125 I/O GMIN = 10, Low Power Mode on

MCP6143 PDIP, SOIC, MSOP, TSSOP,

SOT-23 SOIC8EV, SOIC14EV General Purpose, Low Power

MCP606/7/8/9 1,2,1,4 155 25 250 2.5 to 6.0 -40 to +85 O Low Power Mode on MCP608 PDIP, SOIC, TSSOP, DFN,

SOT-23 SOIC8EV, SOIC14EV Low Offset

MCP616/7/8/9 1,2,1,4 190 25 150 2.3 to 5.5 -40 to +85 O Low Power Mode on MCP618 PDIP, SOIC, TSSOP SOIC8EV, SOIC14EV Low Offset

MCP6231/1R/1U/2/4 1,1,1,2,4 300 30 5,000 1.8 to 6.0 -40 to +125 I/O –PDIP, SOIC, MSOP, TSSOP, DFN,

SOT-23, SC-70 VSUPEV2, SOIC8EV,

SOIC14EV General Purpose

MCP6051/2/4 1,2,4 385 45 150 1.8 to 6.0 -40 to +125 I/O –SOIC, TSSOP, TDFN SOIC8EV, SOIC14EV Low Offset

MCP6241/1R/1U/2/4 1,1,1,2,4 550 70 5,000 1.8 to 5.5 -40 to +125 I/O –PDIP, SOIC, MSOP, TSSOP, DFN,

SOT-23, SC-70 VSUPEV2, SOIC8EV,

SOIC14EV General Purpose

MCP6061/2/4 1,2,4 730 90 150 1.8 to 6.0 -40 to +125 I/O –SOIC, TSSOP, TDFN SOIC8EV, SOIC14EV Low Offset

MCP6001/1R/1U/2/4 1,1,1,2,4 1,000 170 4,500 1.8 to 6.0 -40 to +85,

-40 to +125 I/O –PDIP, SOIC, MSOP, TSSOP,

SOT-23, SC-70 MCP6SX2DM-PICTLPD,

SOIC8EV, SOIC14EV General Purpose

MCP6071/2/4 1,2,4 1,200 170 150 1.8 to 6.0 -40 to +125 I/O –SOIC, TSSOP, TDFN SOIC8EV, SOIC14EV Low Offset

MCP6271/1R/2/3/4/5 1,1,2,1,4,2 2,000 240 3,000 2.0 to 6.0 -40 to +125 I/O Low Power Mode on MCP6273,

Cascaded Gain with MCP6275 PDIP, SOIC, MSOP, TSSOP,

SOT-23 MCP6XXXDM-FLTR,

SOIC8EV, SOIC14EV General Purpose

MCP601/1R/2/3/4 1,1,2,1,4 2,800 325 2,000 2.7 to 6.0 -40 to +85,

-40 to +125 O Low Power Mode on MCP603 PDIP, SOIC, TSSOP, SOT-23 SOIC8EV, SOIC14EV General Purpose

MCP6286 1 3,500 720 1,500 2.2 to 5.5 -40 to +125 O Low Noise SOT-23 VSUPEV2 Low Noise

MCP6281/1R/2/3/4/5 1,1,2,1,4,2 5,000 570 3,000 2.2 to 6.0 -40 to +125 I/O Low Power Mode on MCP6283,

Cascaded Gain with MCP6285 PDIP, SOIC, MSOP, TSSOP,

SOT-23 VSUPEV2, SOIC8EV,

SOIC14EV General Purpose

MCP6021/1R/2/3/4 1,1,2,1,4 10,000 1,350 500, 250 2.5 to 5.5 -40 to +85,

-40 to +125 I/O Low Power Mode on MCP6023 PDIP, SOIC, MSOP, TSSOP,

SOT-23 MCP6XXXEV-AMP1,

SOIC8EV, SOIC14EV Low Offset

MCP6291/1R/2/3/4/5 1,1,2,1,4,2 10,000 1,300 3,000 2.4 to 6.0 -40 to +125 I/O Low Power Mode on MCP6293,

Cascaded Gain with MCP6295 PDIP, SOIC, MSOP, TSSOP,

SOT-23 PIC16F690DM-PCTLHS,

SOIC8EV, SOIC14EV General Purpose

MCP621 1,2,2 20,000 3,600 200 2.5 to 5.5 -40 to +125 O mCal (offset correction, low power mode) SOIC, MSOP, DFN MCP651EV-VOS High Speed, High Output Drive,

Low Offset

MCP631/2/3/5 1,2,1,2 24,000 3,600 8,000 2.5 to 5.5 -40 to +125 O Low Power Mode on MCP633/5 SOIC, MSOP, DFN MCP651EV-VOS High Speed, High Output Drive

MCP651/2/5 1,2,2 50,000 9,000 200 2.5 to 5.5 -40 to +125 O mCal (offset correction, low power mode) SOIC, MSOP, DFN MCP651EV-VOS High Speed, High Output Drive,

Low Offset

MCP661/2/3/5 1,2,1,2 60,000 9,000 8,000 2.5 to 5.5 -40 to +125 O Low Power Mode on MCP663/5 SOIC, MSOP, DFN MCP661DM-LD High Speed, High Output Drive

LINEAR – Op Amps Auto-Zero

Device # per

Package

GBWP

(kHz)

Typ.

(A/amp.)

Typ.

VOS

(±V)

Max.

Supply

Voltage

(V)

Temperature

Range (°C)

Rail-

to-Rail

I/O

Features Packages Featured Demo Board Op Amp Category

MCP6V01/2/3 1,2,1 1,300 400 2 1.8 to 5.5 -40 to +125 I/O Low Power Mode on MCP6V03 SOIC, DFN, TDFN MCP6V01DM-VOS,

MCP6V01RD-TCPL Auto-zeroed

MCP6V06/7/8 1,2,1 1,300 400 3 1.8 to 5.5 -40 to +125 I/O Low Power Mode on MCP6V08 SOIC, DFN, TDFN MCP6V01DM-VOS,

MCP6V01RD-TCPL Auto-zeroed

Signal Chain Design Guide 24

LINEAR – Programmable Gain Ampliﬁ ers (PGA)

Device Channels -3 dB BW (MHz) Typ. IQ (A) Max. VOS (±V) Max. Operating Voltage (V) Temperature Range (°C) Features Packages

MCP6S21/2/6/8 1, 2, 6, 8 2 to 12 1.1 275 2.5 to 5.5 -40 to +85 SPI, 8 Gain Steps, Software Shutdown PDIP, SOIC, MSOP, TSSOP

MCP6S912,3 1, 2, 2 1 to 18 1.0 4000 2.5 to 5.5 -40 to +125 SPI, 8 Gain Steps, Software Shutdown, VREF PDIP, SOIC, MSOP

MIXED SIGNAL

MIXED SIGNAL – Delta-Sigma A/D Converters

Device Resolution

(bits)

Max.Sample

Rate

(samples/sec)

# of Input

Channels Interface Supply

Voltage (V)

Typical

Supply

Current (A)

Typical INL

(ppm)

Temperature

Range (°C) Features Packages Featured Demo Board

MCP3421 18 3.75 1 Diff I

C™ 2.7 to 5.5 145 (continuous)

39 (one shot) 10 -40 to +85 PGA: 1, 2, 4 or 8

Internal voltage reference SOT-23-6 MCP3421EV

MCP3422 18 3.75 2 Diff I²C™ 2.7 to 5.5 145 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference SOIC-8, MSOP-8, DFN-8 MCP3422EV, MCP3421DM-BFG

MCP3423 18 3.75 2 Diff I²C™ 2.7 to 5.5 145 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference MSOP-10, DFN-10 MCP3423EV

MCP3424 18 3.75 4 Diff I²C™ 2.7 to 5.5 145 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference SOIC-14, TSSOP-14 MCP3424EV

MCP3425 16 15 1 Diff I²C™ 2.7 to 5.5 155 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference SOT-23-6 MCP3425EV, MCP3421DM-BFG

MCP3426 16 15 2 Diff I²C™ 2.7 to 5.5 145 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference SOIC-8, MSOP-8, DFN-8 –

MCP3427 16 15 2 Diff I²C™ 2.7 to 5.5 145 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference MSOP-10, DFN-10 –

MCP3428 16 15 4 Diff I²C™ 2.7 to 5.5 145 10 -40 to +85 PGA: 1, 2, 4, or 8

Internal voltage reference SOIC-14, TSSOP-14 –

LINEAR – Comparators

Device # per

Package VREF (V)

Typical

Propagation

Delay (s)

IQ Typical

(A)

Vos Max

(mV)

Operating

Voltage (V)

Temperature

Range (°C) Features Packages

MCP6541 1 – 4 1 5 1.6 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output 5-pin SOT-23

(S,R,U)

, 5-pin SC-70

(S,U)

8-pin PDIP, 8-pin SOIC, 8-pin MSOP

MCP6542 2 – 4 1 5 1.6 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output 8-pin PDIP, 8-pin SOIC, 8-pin MSOP

MCP6543 1 – 4 1 5 1.6 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output, Chip Select 8-pin PDIP, 8-pin SOIC, 8-pin MSOP

MCP6544 4 – 4 1 5 1.6 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output 14-pin PDIP, 14-pin SOIC, 14-pin TSSOP

MCP6546 1 – 4 1 5 1.6 to 5.5 -40 to +125 Open-drain, 9V, Rail-to-Rail Input/Output 5-pin SOT-23

(S,R,U)

, 5-pin SC-70

(S,U)

8-pin PDIP, 8-pin SOIC, 8-pin MSOP

MCP6547 2 – 4 1 5 1.6 to 5.5 -40 to +125 Open-drain, 9V, Rail-to-Rail Input/Output 8-pin PDIP, 8-pin SOIC, 8-pin MSOP

MCP6548 1 – 4 1 5 1.6 to 5.5 -40 to +125 Open-drain, 9V, Rail-to-Rail Input/Output, Chip Select 8-pin PDIP, 8-pin SOIC, 8-pin MSOP

MCP6549 4 – 4 1 5 1.6 to 5.5 -40 to +125 Open-drain, 9V, Rail-to-Rail Input/Output 14-pin PDIP, 14-pin SOIC, 14-pin TSSOP

MCP6561 1 – 0.047 100 10 1.8 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output 5-pin SOT-23

(S,R,U)

, 5-pin SC-70

(S)

MCP6562 2 – 0.047 100 10 1.8 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output 8-pin SOIC, 8-pin MSOP

MCP6564 4 – 0.047 100 10 1.8 to 5.5 -40 to +125 Push-Pull, Rail-to-Rail Input/Output 14-pin SOIC, 14-pin TSSOP

MCP6566 1 – 0.047 100 10 1.8 to 5.5 -40 to +125 Open-Drain, Rail-to-Rail Input/Output 5-pin SOT-23

(S,R,U)

, 5-pin SC-70

(S)

MCP6567 2 – 0.047 100 10 1.8 to 5.5 -40 to +125 Open-Drain, Rail-to-Rail Input/Output 8-pin SOIC, 8-pin MSOP

MCP6569 4 – 0.047 100 10 1.8 to 5.5 -40 to +125 Open-Drain, Rail-to-Rail Input/Output 14-pin SOIC, 14-pin TSSOP

Legend: S = Standard Pinout; R = Reverse Pinout; U = Alternative Pinout

Signal Chain Design Guide 25

MIXED SIGNAL – Successive Approximation Register (SAR) A/D Converters

Part # Resolution

(bits)

Max.Sample

Rate

(samples/sec)

# of Input

Channels Input Type Interface Input Voltage

Range (V)

Max. Supply

Current (A) Max. INL Temperature

Range (°C) Packages Featured Demo Board

MCP3001 10 200 1 Single-ended SPI 2.7 to 5.5 500 ±1 LSB -40 to +85 PDIP-8, SOIC-8, MSOP-8, TSSOP-8 –

MCP3002 10 200 2 Single-ended SPI 2.7 to 5.5 650 ±1 LSB -40 to +85 PDIP-8, SOIC-8, MSOP-8, TSSOP-8 –

MCP3004 10 200 4 Single-ended SPI 2.7 to 5.5 550 ±1 LSB -40 to +85 PDIP-14, SOIC-14, TSSOP-14 –

MCP3008 10 200 8 Single-ended SPI 2.7 to 5.5 550 ±1 LSB -40 to +85 PDIP-16, SOIC-16 –

MCP3021 10 22 1 Single-ended I

C™ 2.7 to 5.5 250 ±1 LSB -40 to +125 SOT-23A-5 MCP3221DM-PCTL, MXSIGDM

MCP3221 12 22 1 Single-ended I

C™ 2.7 to 5.5 250 ±2 LSB -40 to +125 SOT-23A-5 MCP3221DM-PCTL, MXSIGDM

MCP3201 12 100 1 Single-ended SPI 2.7 to 5.5 400 ±1 LSB -40 to +85 PDIP-8, SOIC-8, MSOP-8, TSSOP-8 DV3201A, DVMCPA, MXSIGDM

MCP3202 12 100 2 Single-ended SPI 2.7 to 5.5 550 ±1 LSB -40 to +85 PDIP-8, SOIC-8, MSOP-8, TSSOP-8 DV3201A, DVMCPA, MXSIGDM

MCP3204 12 100 4 Single-ended SPI 2.7 to 5.5 400 ±1 LSB -40 to +85 PDIP-14, SOIC-14, TSSOP-14 DV3204A, DVMCPA, MXSIGDM

MCP3208 12 100 8 Single-ended SPI 2.7 to 5.5 400 ±1 LSB -40 to +85 PDIP-16, SOIC-16 DV3204A, DVMCPA, MXSIGDM

MCP3301 13 100 1 Differential SPI 2.7 to 5.5 450 ±1 LSB -40 to +85 PDIP-8, SOIC-8, MSOP-8, TSSOP-8 DV3201A, DVMCPA, MXSIGDM

MCP3302 13 100 2 Differential SPI 2.7 to 5.5 450 ±1 LSB -40 to +85 PDIP-14, SOIC-14, TSSOP-14 DV3204A, DVMCPA, MXSIGDM

MCP3304 13 100 4 Differential SPI 2.7 to 5.5 450 ±1 LSB -40 to +85 PDIP-16, SOIC-16 DV3204A, DVMCPA, MXSIGDM

MIXED SIGNAL – D/A Converters

Part # Resolution

(Bits)

DACs per

Package Interface VREF Output Settling

Time (s)

DNL

(LSB)

Typical

Standby

Current (A)

Typical

Operating

Current (A)

Temperature Range

(°C) Packages Featured Demo Board

MCP4725 12 1 I

C™ VDD 6 0.75 1 210 -40 to +125 SOT-23-6 MCP4725DM-PTPLS,

MCP4725EV

MCP4728 12 4 I

C™ Int/ VDD 6 0.75 0.04 800 -40 to +125 MSOP-10 MCP4728EV

MCP4821 12 1 SPI Y 4.5 1 0.3 330 -40 to +125 PDIP-8, SOIC-8, MSOP-8 –

MCP4822 12 2 SPI Y 4.5 1 0.3 415 -40 to +125 PDIP-8, SOIC-8, MSOP-8 –

MCP4921 12 1 SPI Ext 4.5 0.75 1 175 -40 to +125 PDIP-8, SOIC-8, MSOP-8 –

MCP4922 12 2 SPI Ext 4.5 0.75 1 350 -40 to +125 PDIP-14, SOIC-14, TSSOP-14 –

TC1320 8 1 SMbus/ I

C™ Ext 10 ±0.8 0.1 350 -40 to +85 SOIC-8, MSOP-8 –

TC1321 10 1 SMbus/ I

C™ Ext 10 ±2 0.1 350 -40 to +85 SOIC-8, MSOP-8 –

MIXED SIGNAL – Delta-Sigma A/D Converters (Continued)

Device Resolution

(bits)

Max.Sample

Rate

(samples/sec)

# of Input

Channels Interface Supply

Voltage (V)

Typical

Supply

Current (A)

Typical INL

(ppm)

Temperature

Range (°C) Features Packages Featured Demo Board

MCP3550-50 22 13 1 Diff SPI 2.7 to 5.5 120 2 -40 to +85 50 Hz noise rejection > 120 dB SOIC-8, MSOP-8 MCP3551DM-PCTL

MCP3550-60 22 15 1 Diff SPI 2.7 to 5.5 140 2 -40 to +85 60 Hz noise rejection > 120 dB SOIC-8, MSOP-8 MCP3551DM-PCTL

MCP3551 22 14 1 Diff SPI 2.7 to 5.5 120 2 -40 to +85 Simultaneous 50/60 Hz rejection SOIC-8, MSOP-8 MCP3551DM-PCTL

MCP3553 20 60 1 Diff SPI 2.7 to 5.5 140 2 -40 to +85 – SOIC-8, MSOP-8 MCP3551DM-PCTL

MCP3901 16 64000 2 Diff SPI 4.5 to 5.5 2050 15 -40 to +85 Two ADC Cores, 16/24 bits, High Sample

Speed (64 ksps), PGA: 1, 2, 4, 8, 16 or 32 SSOP-20, QFN-20 MCP3901EV-MCU16

Signal Chain Design Guide 26

MIXED SIGNAL – Digital Potentiometers

Device # of

Taps

# per

Package Interface VDD Operating

Range

(1)

Volatile/

Non-Volatile Resistance (ohms) INL (Max.) DNL (Max.) Temperature

Range (°C) Packages Featured Demo Board

MCP4011 64 1 U/D 1.8V to 5.5V Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOIC-8 MCP402XEV, MCP4XXXDM-DB

MCP4012 64 1 U/D 1.8V to 5.5V Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOT-23-6 MCP402XEV, SC70EV

MCP4013 64 1 U/D 1.8V to 5.5V Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOT-23-6 MCP402XEV, SC70EV

MCP4014 64 1 U/D 1.8V to 5.5V Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOT-23-5 MCP402XEV, SC70EV

MCP4017 128 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 SC-70-6 SC70EV

MCP4018 128 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 SC-70-6 SC70EV

MCP4019 128 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 SC-70-5 SC70EV

MCP40D17 128 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 SC-70-6 SC70EV

MCP40D18 128 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 SC-70-6 SC70EV

MCP40D19 128 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 SC-70-5 SC70EV

MCP4021 64 1 U/D 2.7V to 5.5V Non-Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOIC-8 MCP402XEV, MCP4XXXDM-DB

MCP4022 64 1 U/D 2.7V to 5.5V Non-Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOT-23-6 MCP402XEV, SC70EV

MCP4023 64 1 U/D 2.7V to 5.5V Non-Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOT-23-6 MCP402XEV, SC70EV

MCP4024 64 1 U/D 2.7V to 5.5V Non-Volatile 2.1K, 5K, 10K, 50K ±0.5 LSb ±0.5 LSb -40 to +125 SOT-23-5 MCP402XEV, SC70EV

MCP41010 256 1 SPI 2.7V to 5.5V Volatile 10K ±1 LSb ±1 LSb -40 to +85 PDIP-8, SOIC-8 MCP4XXXDM-DB

MCP41050 256 1 SPI 2.7V to 5.5V Volatile 50K ±1 LSb ±1 LSb -40 to +85 PDIP-8, SOIC-8 MCP4XXXDM-DB

MCP41100 256 1 SPI 2.7V to 5.5V Volatile 100K ±1 LSb ±1 LSb -40 to +85 PDIP-8, SOIC-8 MCP4XXXDM-DB

MCP42010 256 2 SPI 2.7V to 5.5V Volatile 10K ±1 LSb ±1 LSb -40 to +85 PDIP-14, SOIC-14, TSSOP-14 MCP4XXXDM-DB

MCP42050 256 2 SPI 2.7V to 5.5V Volatile 50K ±1 LSb ±1 LSb -40 to +85 PDIP-14, SOIC-14, TSSOP-14 MCP4XXXDM-DB

MCP42100 256 2 SPI 2.7V to 5.5V Volatile 100K ±1 LSb ±1 LSb -40 to +85 PDIP-14, SOIC-14, TSSOP-14 MCP4XXXDM-DB

MCP4131 129 1 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 PDIP-8, SOIC-8, MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4132 129 1 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 PDIP-8, SOIC-8, MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4141 129 1 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 PDIP-8, SOIC-8, MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4142 129 1 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 PDIP-8, SOIC-8, MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4151 257 1 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 PDIP-8, SOIC-8,

MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4152 257 1 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 PDIP-8, SOIC-8,

MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4161 257 1 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 PDIP-8, SOIC-8,

MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4162 257 1 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 PDIP-8, SOIC-8,

MSOP-8, DFN-8 MCP42XXDM-PTPLS

MCP4231 129 2 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 PDIP-14, SOIC-14, TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP42XXDM-PTPLS

MCP4232 129 2 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-10, DFN-10 MCP42XXDM-PTPLS

MCP4241 129 2 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 PDIP-14, SOIC-14, TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP42XXDM-PTPLS

MCP4242 129 2 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-10, DFN-10 MCP42XXDM-PTPLS

MCP4251 257 2 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 PDIP-14, SOIC-14, TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP42XXDM-PTPLS

MCP4252 257 2 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-10, DFN-10 MCP42XXDM-PTPLS

MCP4261 257 2 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 PDIP-14, SOIC-14, TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP42XXDM-PTPLS

MCP4262 257 2 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-10, DFN-10 MCP42XXDM-PTPLS

MCP4351 257 4 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1.0 LSb ±0.5 LSb -40 to +125 TSSOP-20, QFN-20 TSSOP20EV

MCP4352 257 4 SPI 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1.0 LSb ±0.5 LSb -40 to +125 TSSOP-14 TSSOP20EV

Note 1: Analog characteristics may be tested at different voltage ranges.

Signal Chain Design Guide 27

MIXED SIGNAL – Digital Potentiometers (Continued)

Device # of

Taps

# per

Package Interface VDD Operating

Range

(1)

Volatile/

Non-Volatile Resistance (ohms) INL (Max.) DNL (Max.) Temperature

Range (°C) Packages Featured Demo Board

MCP4361 257 4 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1.0 LSb ±0.5 LSb -40 to +125 TSSOP-20, QFN-20 TSSOP20EV

MCP4362 257 4 SPI 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1.0 LSb ±0.5 LSb -40 to +125 TSSOP-14 TSSOP20EV

MCP4531 129 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4532 129 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4541 129 1 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4542 29 1 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4551 257 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4552 257 1 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4561 257 1 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4562 257 1 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-8, DFN-8 MCP46XXDM-PTPLS

MCP4631 129 2 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP46XXDM-PTPLS

MCP4632 129 2 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-10, DFN-10 MCP46XXDM-PTPLS

MCP4641 129 2 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP46XXDM-PTPLS

MCP4642 129 2 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±0.5 LSb ±0.25 LSb -40 to +125 MSOP-10, DFN-10 MCP46XXDM-PTPLS

MCP4651 257 2 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP46XXDM-PTPLS

MCP4652 257 2 I

C™ 1.8V to 5.5V Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-10, DFN-10 MCP46XXDM-PTPLS

MCP4661 257 2 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 TSSOP-14, QFN-16 MCP4XXXDM-DB, MCP46XXDM-PTPLS

MCP4662 257 2 I

C™ 2.7V to 5.5V Non-Volatile 5K, 10K, 50K, 100K ±1 LSb ±0.5 LSb -40 to +125 MSOP-10, DFN-10 MCP46XXDM-PTPLS

Note 1: Analog characteristics may be tested at different voltage ranges.

THERMAL MANAGEMENT

THERMAL MANAGEMENT PRODUCTS – Temperature Sensors

Part #

Typical

Accuracy

(°C)

Maximum

Accuracy

@ 25°C (°C)

Maximum

Temperature

Range (°C)

Vcc Range

(V)

Maximum Supply

Current (A) Resolution (bits) Packages Featured Demo Board

Serial Output Temperature Sensors

MCP9800 ±0.5 ±1 -55 to +125 +2.7 to +5.5 400 9-12 SOT-23-5 MCP9800DM-TS1

MCP9801 ±0.5 ±1 -55 to +125 +2.7 to +5.5 400 9-12 SOIC-8 150 mil, MSOP-8 MCP9800DM-TS1

MCP9802 ±0.5 ±1 -55 to +125 +2.7 to +5.5 400 9-12 SOT-23-5 MCP9800DM-TS1

MCP9803 ±0.5 ±1 -55 to +125 +2.7 to +5.5 400 9-12 SOIC-8 150 mil, MSOP-8 MCP9800DM-TS1

MCP9804 ±0.25 ±1 -40 to +125 +2.7 to +5.5 400 12-bits MSOP-8, DFN-8 TMPSNSRD-RTD2, TMPSNSRD-TCPL1

MCP9805 ±2 ±3 -40 to +125 3.0 to 3.6 500 10 TSSOP-8, DFN-8 –

MCP98242 ±2 ±3 -40 to +125 3.0 to 3.6 500 10 TSSOP-8, DFN-8, TDFN-8, UDFN-8 –

MCP98243 ±0.5 ±3 -40 to +125 3.0 to 3.6 500 11 TSSOP-8, DFN-8, TDFN-8, UDFN-8 –

TC72 ±0.5 ±2 -55 to +125 +2.7 to +5.5 400 10 MSOP-8, DFN-8 TC72DM-PICTL

TC74 ±0.5 ±2 -40 to +125 +2.7 to +5.5 350 8 SOT-23-5, TO-220-5 TC74DEMO

TC77 ±0.5 ±1 -55 to +125 +2.7 to +5.5 400 12 SOIC-8 150 mil, SOT-23-5 TC77DM-PICTL

TCN75 ±0.5 ±3 -55 to +125 +2.7 to +5.5 1000 9 SOIC-8 150 mil, MSOP-8 –

TCN75A ±0.5 ±3 -40 to +125 +2.7 to +5.5 400 9-12 SOIC-8 150 mil, MSOP-8 –

Signal Chain Design Guide 28

POWER MANAGEMENT

POWER MANAGEMENT – Voltage References

Part # Vcc Range (V) Output Voltage (V) Max. Load

Current (mA)

Initial Accuracy

(max.%)

Temperature

Coefﬁ cient (ppm/°C)

Maximum Supply

Current (A @ 25°C) Packages

MCP1525 2.7 to 5.5 2.5 ±2 ±1 50 100 SOT-23B-3, TO-92-3

MCP1541 4.3 to 5.5 4.096 ±2 ±1 50 100 SOT-23B-3, TO-92-3

THERMAL MANAGEMENT PRODUCTS – Temperature Sensors

Part #

Typical

Accuracy

(°C)

Maximum

Accuracy

@ 25°C (°C)

Maximum

Temperature

Range (°C)

Vcc Range

(V)

Maximum Supply

Current (A) Resolution (bits) Packages Featured Demo Board

Logic Output Temperature Sensors

MCP9509 ±0.5 NA -40 to +125 2.7 to 5.5 50 – SOT-23-5 –

MCP9510 ±0.5 NA -40 to +125 2.7 to 5.5 80 – SOT-23-6 –

TC620 ±1 ±3 -55 to 125 4.5 to 18 400 – PDIP-8, SOIC-8 150 mil –

TC621 ±1 ±3 -55 to 125 4.5 to 18 400 – PDIP-8, SOIC-8 150 mil –

TC622 ±1 ±5 -40 to +125 4.5 to 18 600 – PDIP-8, SOIC-8 150 mil, TO-220-5 –

TC623 ±1 ±3 -40 to +125 2.7 to 4.5 250 – PDIP-8, SOIC-8 150 mil –

TC624 ±1 ±5 -40 to +125 2.7 to 4.5 300 – PDIP-8, SOIC-8 150 mil –

TC6501 ±0.5 ±4 -55 to 135 2.7 to 5.5 40 – SOT-23-5 –

TC6502 ±0.5 ±4 -55 to 135 2.7 to 5.5 40 – SOT-23-5 –

TC6503 ±0.5 ±4 -55 to 135 2.7 to 5.5 40 – SOT-23-5 –

TC6504 ±0.5 ±4 -55 to 135 2.7 to 5.5 40 – SOT-23-5 –

Voltage Output Temperature Sensors

MCP9700 ±1 ±4 -40 to +150 2.3 to 5.5 6 – SC-70-5, SOT-23-3, TO-92-3 MCP9700DM-PCTL

MCP9700A ±1 ±2 -40 to +150 2.3 to 5.5 6 – SC-70-5, SOT-23-3, TO-92-3 MCP9700DM-PCTL

MCP9701 ±1 ±4 -40 to +125 +3.1 to +5.5 6 – SC-70-5, SOT-23-3, TO-92-3 MCP9700DM-PCTL

MCP9701A ±1 ±2 -40 to +125 +3.1 to +5.5 6 – SC-70-5, SOT-23-3, TO-92-3 MCP9700DM-PCTL

TC1046 ±0.5 ±2 -40 to +125 2.7 to 4.4 60 – SOT-23-3 –

TC1047 ±0.5 ±2 -40 to +125 2.7 to 4.4 60 – SOT-23-3 TC1047ADM-PICTL

TC1047A ±0.5 ±2 -40 to +125 +2.5 to +5.5 60 – SOT-23-3 TC1047ADM-PICTL

TC1047A ±0.5 ±2 -40 to +125 +2.5 to +5.5 60 – SOT-23B-3 –

Signal Chain Design Guide 29

Thermal

Management

Power

Management

Temperature

Sensors

Fan Speed

Controllers/

Fan Fault

Detectors

LDO & Switching

Regulators

Charge Pump

DC/DC Converters

Power MOSFET

Drivers

PWM Controllers

System Supervisors

Voltage Detectors

Voltage References

Li-Ion/Li-Polymer

Battery Chargers

Mixed-Signal

A/D Converter

Families

Digital

Potentiometers

D/A Converters

V/F and F/V

Converters

Energy

Measurement

ICs

Interface

CAN Peripherals

Infrared

Peripherals

LIN Transceivers

Serial Peripherals

Ethernet Controller

USB Peripheral

Linear

Op Amps

Programmable

Gain

Ampliﬁers

Comparators

Safety & Security

Photoelectric

Smoke Detectors

Ionization Smoke

Detectors

Ionization Smoke

Detector Front Ends

Piezoelectric

Horn Drivers

Robustness

■MOSFET Drivers lead the industry in latch-up

immunity/stability

■High performance LIN and CAN transceivers

Low Power/Low Voltage

■Op Amp family with the lowest power for a given gain

bandwidth

■600 nA/1.4V/14 kHz bandwidth op amps

■1.8V charge pumps and comparators

■1.6 µA LDOs

■Low power ADCs with one-shot conversion

Integration

■One of the first to market with integrated LDO with

Reset and Fan Controller with temperature sensor

■PGA integrates MUX, resistive ladder, gain switches,

high-performance amplifier, SPI interface

■

Industry’s first 12-bit quad DAC with non-volatile EEPROM

■

Delta-Sigma ADCs feature on-board PGA and voltage

reference

■Highly integrated charging solutions for Li-ion and

LiFePO4 batteries

Space Savings

■Resets and LDOs in SC70 package, A/D and D/A

converters in SOT-23 package

■CAN and IrDA® Standard protocol stack embedded in an

18-pin package

Accuracy

■Low input offset voltages

■High gains

Innovation

■Low pin-count embedded IrDA Standard stack, FanSense™

technology

■Select Mode™ operation

■Industry’s first op amp featuring on-demand calibration via

mCal technology

■Digital potentiometers feature WiperLock™ technology to

secure EEPROM

For more information, visit the Microchip web site at:

www.microchip.com

Analog and Interface Attributes

Stand-Alone Analog and Interface Portfolio

Information subject to change. The Microchip name and logo, the Microchip logo and PIC are registered trademarks of Microchip

Technology Incorporated in the U.S.A. and other countries. FilterLab, MXDEV and MXLAB are registered trademarks of Microchip

Technology Incorporated in the U.S.A. FanSense, Select Mode and WiperLock are trademarks of Microchip Technology Incorporated

in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies.

DS21825F

*DS21825F*

Support

Microchip is committed to supporting its customers

in developing products faster and more efficiently. We

maintain a worldwide network of field applications

engineers and technical support ready to provide product

and system assistance. In addition, the following service

areas are available at www.microchip.com:

■ Support link provides a way to get questions

answered fast: http://support.microchip.com

■ Sample link offers evaluation samples of any

Microchip device: http://sample.microchip.com

■ Forum link provides access to knowledge base and

peer help: http://forum.microchip.com

■ Buy link provides locations of Microchip Sales Channel

Partners: www.microchip.com/sales

AMERICAS

Atlanta

Tel: 678-957-9614

Boston

Tel: 774-760-0087

Chicago

Tel: 630-285-0071

Cleveland

Tel: 216-447-0464

Dallas

Tel: 972-818-7423

Detroit

Tel: 248-538-2250

Kokomo

Tel: 765-864-8360

Los Angeles

Tel: 949-462-9523

Santa Clara

Tel: 408-961-6444

Toronto

Mississauga, Ontario

Tel: 905-673-0699

EUROPE

Austria - Wels

Tel: 43-7242-2244-39

Denmark - Copenhagen

Tel: 45-4450-2828

France - Paris

Tel: 33-1-69-53-63-20

Germany - Munich

Tel: 49-89-627-144-0

Italy - Milan

Tel: 39-0331-742611

Netherlands - Drunen

Tel: 31-416-690399

Spain - Madrid

Tel: 34-91-708-08-90

UK - Wokingham

Tel: 44-118-921-5869

ASIA/PACIFIC

Australia - Sydney

Tel: 61-2-9868-6733

China - Beijing

Tel: 86-10-8528-2100

China - Chengdu

Tel: 86-28-8665-5511

China - Hong Kong SAR

Tel: 852-2401-1200

China - Nanjing

Tel: 86-25-8473-2460

China - Qingdao

Tel: 86-532-8502-7355

China - Shanghai

Tel: 86-21-5407-5533

China - Shenyang

Tel: 86-24-2334-2829

China - Shenzhen

Tel: 86-755-8203-2660

China - Wuhan

Tel: 86-27-5980-5300

China - Xiamen

Tel: 86-592-2388138

China - Xian

Tel: 86-29-8833-7252

China - Zhuhai

Tel: 86-756-3210040

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444

India - New Delhi

Tel: 91-11-4160-8631

India - Pune

Tel: 91-20-2566-1512

Japan - Yokohama

Tel: 81-45-471- 6166

Korea - Daegu

Tel: 82-53-744-4301

Korea - Seoul

Tel: 82-2-554-7200

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857

Malaysia - Penang

Tel: 60-4-227-8870

Philippines - Manila

Tel: 63-2-634-9065

Singapore

Tel: 65-6334-8870

Taiwan - Hsin Chu

Tel: 886-3-572-9526

Taiwan - Kaohsiung

Tel: 886-7-536-4818

Taiwan - Taipei

Tel: 886-2-2500-6610

Thailand - Bangkok

Tel: 66-2-694-1351

1/26/09

Sales Office Listing

Training

If additional training interests you, then Microchip can

help. We continue to expand our technical training options,

offering a growing list of courses and in-depth curriculum

locally, as well as significant online resources – whenever

you want to use them.

■ Regional Training Centers: www.microchip.com/rtc

■ MASTERs Conferences: www.microchip.com/masters

■ Worldwide Seminars: www.microchip.com/seminars

■ eLearning: www.microchip.com/webseminars

■ Resources from our Distribution and Third Party Partners

www.microchip.com/training

Microchip Technology Inc.

2355 W. Chandler Blvd.

Chandler, AZ 85224-6199

www.microchip.com

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Microchip:

MCP40D18T-103AE/LT MCP40D18T-104AE/LT MCP40D18T-502AE/LT MCP40D18T-503AE/LT