© 2007 Microchip Technology Inc. DS51668A
MCP6XXX Amplifier
Evaluation Board 2
User’s Guide
DS51668A-page ii © 2007 Microchip Technology Inc.
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MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page iii
Table of Contents
Preface ...........................................................................................................................1
Introduction............................................................................................................1
Document Layout..................................................................................................1
Conventions Used in this Guide............................................................................2
Recommended Reading ........................................................................................3
The Microchip Web Site........................................................................................3
Customer Support.................................................................................................3
Document Revision History...................................................................................3
Chapter 1. Product Overview .......................................................................................5
1.1 Introduction .....................................................................................................5
1.2 MCP6XXX Amplifier Evaluation Board 2 Kit Contents ...................................5
1.3 Microchip’s Web-Based Mindi™ Analog Simulator Tool ................................6
1.4 MCP6XXX Amplifier Evaluation Board 2 Description ..................................... 6
Chapter 2. Installation and Operation .........................................................................7
2.1 Introduction .....................................................................................................7
2.2 Required Tools ...............................................................................................7
2.3 MCP6XXX Amplifier Evaluation Board 2 Set-up ............................................7
2.4 MCP6XXX Amplifier Evaluation Board 2 Operation ..................................... 13
Appendix A. Schematic and Layouts ........................................................................23
A.1 Introduction ..................................................................................................23
A.2 Board - Schematic .......................................................................................24
A.3 Board - Top Silk Layer ..............................................................................25
A.4 Board - Top Metal Layer ..............................................................................26
A.5 Board - Bottom Metal Layer .........................................................................27
Appendix B. Bill of Materials (BOM) ..........................................................................29
B.1 MCP6XXX Amplifier Evaluation Board 2 BOM ............................................29
Worldwide Sales and Service ....................................................................................32
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page iv © 2007 Microchip Technology Inc.
NOTES:
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page 1
Preface
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP6XXX Amplifier Evaluation Board 2. Items discussed in this chapter include:
• Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Web Site
• Customer Support
• Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP6XXX Amplifier Evaluation Board 2. The
manual layout is as follows:
•Chapter 1. “Product Overview” - Provides the important information about the
MCP6XXX Amplifier Evaluation Board 2.
•Chapter 2. “Insta lla tion and Ope rat io n” – Covers the installation and opera tio n
of the MCP6XXX Amplifier Evaluation Board 2. It lists the required tools, shows
how to set up the board, and demonstrates how to verify the amplifier operation.
•Appendix A. “Schematic and Layout s” – Shows the schematic and board
layouts for the MCP6XXX Amplifier Evaluation Board 2.
•Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP6XXX Amplifier Evaluation Board 2.
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip .com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® IDE on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 2 © 2007 Microchip Technology Inc.
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description Represents Examples
Arial font:
Italic characters Referenced books MPLAB® IDE User’s Guide
Emphasized text ...is the only compiler...
Initial caps A window the Output window
A dialog the Settings dialog
A menu selection select Enable Programmer
Quotes A field name in a window or
dialog “Save project before build”
Underlined, italic text with
right angle bracket A menu path File>Save
Bold characters A dialog button Click OK
A tab Click the Power tab
N‘Rnnnn A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
4‘b0010, 2‘hF1
Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>
Courier New font:
Plain Courier New Sample source code #define START
Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-li n e op ti o ns -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’
Italic Courier New A variable argument file.o, where file can be
any valid filena me
Square brackets [ ] Optional arguments mcc18 [options] file
[options]
Curly brackets and pipe
character: { | } Choice of mutually exclusive
arguments; an OR selection errorlevel {0|1}
Ellipses... Replaces repeated text var_name [,
var_name...]
Represents code supplied by
user void main (void)
{ ...
}
Preface
© 2007 Microchip Technology Inc. DS51668A-page 3
RECOMMENDED READING
This user's guide d escribes how to use MCP6XXX Amplifier Evaluation Board 2. Other
useful documents are listed below. The following Microchip documents are available
and recommended as supplemental reference resources.
MCP6021/2/ 3/ 4 Data Sheet, “Rail-to-Rail Input/Output, 10 MHz Op Amps”
(DS21685)
This data sheet provides detailed information regarding the MCP602X product family.
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
•Product Support – Da ta sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
•General Technical Support – Frequently Asked Questions (FAQs), technical
support reque s ts, online dis cus sio n groups, Microchip consultant program
member listing
•Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory repr esentatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
• Local Sales Of fice
• Field Application Engineer (FAE)
• Technical Support
• Development Systems Information Line
Customers should conta ct their distributor, represent ative or field applica tion engine er
for support. Local sales offices are also available to help customers. A listing of sales
offices and locations is included in the back of th is do cum e nt .
Technical support is available through the web site at: http://support.microchip.com
DOCUMENT REVISION HISTORY
Revision A (July 2007)
• Initial Release of this Document.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 4 © 2007 Microchip Technology Inc.
NOTES:
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page 5
Chapter 1. Product Overview
1.1 INTRODUCTION
The MCP6XXX Amplifier Evaluation Board 2 is described by the following:
• Assembly # : 114-00148
• Order # : MCP6XXXEV-AMP2
• Name: MCP6XXX Amplifier Evaluation Board 2
Items discussed in this chapter include:
•Section 1.2 “MCP6XXX Amplifier Evaluation Board 2 Kit Contents”
•Section 1.3 “Micro chip’s Web-Based Mindi™ Analog Simulator Tool”
•Section 1.4 “MCP6XXX Amplifier Evaluation Board 2 Description”
1.2 MCP6XXX AMPLIFIER EVALUATION BOARD 2 KIT CONTENTS
• MCP6XXX Amplifier Evaluation Board 2 - One partially assembled board
• Important Information “Read First”
• Accessory Bag - Contains loose parts for populating sockets on board
• Analog and Interface Pr oducts Demonstration Boards CD-ROM (DS21912)
- MCP6XXX Amplifier Evaluation Board 2 User’s Guide (DS51668)
FIGURE 1-1: MCP6XXX Amplifier Evaluation Board 2 Kit.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 6 © 2007 Microchip Technology Inc.
1.3 MICROCHIP’S WEB-BASED MINDI™ ANALOG SIMULATOR TOOL
The Mindi™ Analog Simulator tool is an innovative software tool that simplifies analog
circuit design. The Mindi™ Analog Simulator tool supports the following application
circuits: 1) Active Filte rs, 2) Amplifiers, 3) Battery Chargers, and 4) DC-to-DC
Converters. The Mindi™ Amplifier Designer provides full schematic diagrams of the
amplifier application circuit with recommended component values and displays the
responses in frequency and time domains.
The Mindi™ Analog Simulator tool is a free web-based design tool available on the
Microchip web site at http://www.microchip.com under “Online Simulation Tools” or
by going directly to the Mindi™ web site at http://www.microchip.com/mindi.
The circuit simulator within the Mindi™ Ana log Simulator to ol can be downloaded an d
installed on a personal computer (PC) for more convenient simulations. Modified circuit
files can also be downloaded to the PC.
1.4 MCP6XXX AMPLIFIER EVALUATION BOARD 2 DESCRIPTION
MCP6XXX Amplifier Evaluation Board 2 is designed to support inverting/non-inverting
summing amplifier circuits, however, at this time, the Mindi™ Amplifier Designer only
supports the inverting summing amplifier circuits.
The MCP6XXX Amplifier Evaluation Board 2 has the following features:
• All amplifier resistors and capacitors are socketed
• All of the component labels on board keep consistent with those on schematic
generated in the Mindi™ Amplifier Designer
• Support s all Microchip single op amps
- PDIP-8 package (e.g., MCP6021) are socketed
- SOIC-8 package can be accomodated; see Section 2.4.3 “Amplifier
Modifications Using 8-Pin SOIC Op Amp s”
• Test points for connecting lab equipment
• Single supply configuration
Figure 1-2 shows the block diagram of the MCP6XXX Amplifier Evaluation Board 2.
Lab equipment can be attached (via test points) to measure the amplifier response.
FIGURE 1-2: MCP6XXX Amplifier Evaluation Board 2 Block Diagram.
Amplifier Circuit
(Op Amp, Resistors, Signal Output
and Test Point
Signal Inputs
and
Mid-Supply Ref
and Power Supply
and Test Point
Test Points
Test Point
Capacitors and Jumpers)
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page 7
Chapter 2. Installation and Operation
2.1 INTRODUCTION
This chapter shows how to set up the MCP6XXX Amplifier Evaluation Board 2.
Items discussed in this chapter include:
• Required Tools
• MCP6XXX Amplifier Evaluation Board 2 Set-Up
• MCP6XXX Amplifier Evaluation Board 2 Operation
2.2 REQUIRED TOOLS
• Lab power supply
• Lab signal source (e.g., function generator)
• Lab measurement equipment (e.g., oscilloscope)
2.3 MCP6XXX AMPLIFIER EVALUATION BOARD 2 SET-UP
The MCP6XXX Amplifier Evaluation Board 2 supports inverting summing amplifier and
non-inverting summing am plifier. This section details the conversion of these
topologies to the MCP6XXX Amplifier Eva luation Board 2. Figure 2-1 shows the circuit
diagram for the board.
FIGURE 2-1: MCP6XXX Amplifier Evaluation Board 2 Circuit Diagram.
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF UR1
U1
VDD 0.1 µF
CU1
CR1
0.1 µF
A
B
DP1 CP1
1.0 µF
Power Supply
D
JP2 CR10
R2
R3
R4
R5
R6
R7
R8
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
RL
CL VL
R11
VDD
VREF
GND VDD
VIN-1
R9 GND
R1
RISO
GND
JP1
* Test Points
********
*
*
*
*
*
*
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 8 © 2007 Microchip Technology Inc.
The power supply voltage needs to be in the allowed range for the installed op amps.
Any of Microchip’s op amps that operate below 5.5V can be used. Moreover , the power
supply is protected by a zener diode with nominal voltage 6.2V and bypassed by a
1.0 µF capacitor. (See Figure 2-3: “Power Supply Block.”)
The mid-supply reference consists of a voltage divider and a buffer amplifier. (See
Figure 2-4: “Mid-supply Reference Bloc k.”)
The resistors that are part of an amplifier are placed in pin sockets which are labeled.
All of the component labels on board kee p consistent with those on schematic gener-
ated in the Mindi™ Amplifier Designer. The op amps are bypassed by 0.1 µF capacitors
and the single op amp U1 can have either a PDIP-8 or SOIC-8 package.
• PDIP-8 packages are inserted into the DIP-8 socket to the right of the U1 label.
• SOIC-8 packages can be accommodated; see Section 2.4.3 “Amplifier
Modifications Using 8-Pin SOIC Op Amps”.
The (surface mount) test points for power supply , ground, input signal and output signal
allow lab equipment to be connected to the board. The MCP6XXX Amplifier Evaluation
Board 2 top view is shown in Figure 2-2.
FIGURE 2-2: MCP6XXX Amplifier Evaluation Board 2 Top View.
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 9
2.3.1 Top Level Amplifier Circuit Diagrams
2.3.1.1 POWER SUPPLY BLOCK
The power supply is protected by a zener diode and bypassed by a capacitor.
Figure 2-3 shows the circuit diagram for the power supply. CP1 = 1.0 µF.
FIGURE 2-3: Power Supply Block.
2.3.1.2 MID-SUPPLY REFERENCE BLOCK
The mid-supply reference consists of a voltage divider and a buffer amplifier . Figure 2-4
shows the circuit diagram for the mid-supply reference.
CR1 = CR2 = 0.1 µF, RR1 = RR2 = 20.0 k Ω.
FIGURE 2-4: Mid-supply Reference Block.
Power Supply
VS
VDD
CP1
DP1
Note: DP1 is a zener diode with nominal voltage of 6.2V.
Mid-supply Reference
VDD
VR
CR1
RR1
UR1
CR2 RR2
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 10 © 2007 Microchip Technology Inc.
2.3.1.3 OUTPUT LOAD BLOCK
The output load con sists of a capacitor and two resistor s. Figure 2-5 shows the circuit
diagram for the output load. RISO is used to stabilize the amplifier when it drives a large
capacitive load (CL). RISO is a short circuit (0Ω) when CL is small.
FIGURE 2-5: Output Load Block.
Output Load
VL
CL
RL
VOUT RISO
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 11
2.3.1.4 INVERTING SUMMING AMPLIFIER
• Amplifies two or more input voltages with an inverting gain. Input and output
voltages ar e shifted by a reference vo ltage fo r single supply
• The Mindi™ Amplifier Designer gives design recommendation s for circuits with up
to 8 inputs; see the circuit diagram shown in Figure 2-6.
- Fill the sockets with the recommended resistors and capacitors
- Set JP1 and JP2 in the correct positions
(for the given example, JP1: Position A, JP2: Position C)
FIGURE 2-6: Inverting Summing Amplifier Circuit Diagram.
Figure 2-7 shows an example of the inverting summing amplifier circuit diagram sup-
ported by MCP6XXX Amplifier Evaluation Board 2.
FIGURE 2-7: Inverting Summing Amplifier Example Supported by the
MCP6XXX Amplifier Evaluation Board 2.
Output
Load
Mid-supply
Reference
Power
Supply
VS
VR
VL
V2
V3
VDD
R1
R2
R3
R9
R11
CU1
U1
VOUT
V1
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
VIN-1
********
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF UR1
U1
0.1µF
CU1
CR1
0.1 µF
A
B
DP1 CP1
1.0 µF
Power Supply
D
JP2 CR10
R2
R3
R4
R5
R6
R7
R8
RL
CL
R11
VDD
R9
R1
RISO
JP1
VDD
VL
VREF
GND VDD
GND
GND
* Test Points
*
*
*
*
*
*
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 12 © 2007 Microchip Technology Inc.
2.3.1.5 NON-INVERTING SUMMING AMPLIFIER (NOT SUPPORTED)
• Amplifies two or more voltages with a non-inverting gain. Input and output
voltages ar e shifted by a reference voltage for single supply
• It is up to the user to design this circuit to produce th e target ga ins for up to eight
inputs
- Select the correct resistor and capacitor values
- Set JP1 and JP2 as needed
(for the given example, JP1: Position B, JP2: Position D)
FIGURE 2-8: Non-Inverting Summing Amplifier Circuit Diagram.
Figure 2-9 shows an example of the non-inverting summing amplifier circuit diagram
supported by MCP6XXX Amplifier Evaluation Board 2.
FIGURE 2-9: Non-Inverting Summing Amplifier Example Supported by the
MCP6XXX Amplifier Evaluation Board 2.
Output
Load
Mid-supply
Reference
Power
Supply
VS
VDD
VL
V1
V2
V3
VOUT
VR
R1
R2
R3
R10 R11
CU1
U1
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF UR1
U1
0.1 µF
CU1
CR1
0.1 µF
A
B
DP1 CP1
1.0 µF
Power Supply
D
JP2 CR10
R2
R3
R4
R5
R6
R7
R8
RL
CL
R11
VDD
R9
R1
RISO
JP1
VDD
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
VL
VREF
GND VDD
VIN-1
GND
GND
* Test Points
********
*
*
*
*
*
*
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 13
2.4 MCP6XXX AMPLIFIER EVALUATION BOARD 2 OPERATION
Items discussed in this section include:
• Building the Amplifier
• Testing the Amplifier
• Amplifier Modification: Using 8-Pin SOIC Op Amps
2.4.1 Building the Amplifier
The accessory bag that comes with this kit makes it quick and easy to evaluate the
amplifier described below, which was designed in the Mindi™ Amplifier Designer.
This amplifier is described as follows:
• Inverting Summing Amplifier (Single Supply Configuration)
• Power Supply Voltage is 5.0V
• Desired Gain for VIN-1 is 1 V/V
• Desired Gain for VIN-2 is 1 V/V
• Desired Gain for VIN-3 is 1 V/V
• Load Capacitance is 56 pF
FIGURE 2-10: Inverting Summing Amplifier Designed In the Mindi™ Amplifier Designer.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 14 © 2007 Microchip Technology Inc.
Figure 2-11 shows the same circuit redrawn to emphasize th e inve r ting summ ing
amplifier.
FIGURE 2-11: Inverting Summing Amplifier Supported by the MCP6XXX
Amplifier Evaluation Board 2 Kit.
Each of the components in Figure 2-11 that needs to be inserted in a socket on the
MCP6XXX Amplifier Evaluation Board 2 is listed in Table 2-1 and Table 2-2.
TABLE 2-1: AMPLIFIER COMPONENTS LIST
TABLE 2-2: JUMPER POSITIONS
R11
R9
CU1
VR
VL
VOUT Output
Load
Mid-supply
Reference
VIN-1
R1
R2
R3
U1
VS
VDD Power
Supply
VIN-2
VIN-3
PCB Labels Component Values
R1 7.96 kΩ
R2 7.96 kΩ
R3 7.96 kΩ
R9 2.00 kΩ
R11 7.96 kΩ
RISO 0Ω
RL 7.96 kΩ
CL 56 nF
U1 MCP6021, PDIP-8, 10 MHz
Jumper Position
JP1 A
JP2 C
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 15
Figure 2-12 is the fully assembled inverting summing amplifier’s circuit diagr am.
FIGURE 2-12: Fully Assembled Inverting Summing Amplifier Supported by the
MCP6XXX Amplifier Evaluation Board 2.
The fully assembled MCP6XXX Amplifier Evaluation Board 2 top view is shown in
Figure 2-13.
FIGURE 2-13: Pictur e of the Inve rtin g Summ in g Am plifier Supp or te d by the
MCP6XXX Amplifier Evaluation Board 2.
CR2
RR1
20 kΩ
RR2
20 kΩ
0.1 µF UR1
U1
0.1 µF
CU1
CR1
0.1 µF
A
B
DP1 CP1
1.0 µF
Power Supply
D
JP2 CR10
R2
R3
R4
R5
R6
R7
R8
RL
CL
R11
VDD
R9
R1
RISO
VDD
JP1
VIN-2
VIN-3
VIN-4
VIN-5
VIN-6
VIN-7
VIN-8
VL
VREF
GND VDD
VIN-1
GND
GND
* Test Points
********
*
*
*
*
*
*
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 16 © 2007 Microchip Technology Inc.
2.4.2 Testing the Amplifier
2.4.2.1 CHECKING THE TEST POINTS
The (surface mount) test points for power supply , ground, input signal and output signal
allow lab equipment to be connected to the bo ard. Figure 2-14 shows the test points to
check.
FIGURE 2-14: Checking the Test Points .
VDD
VL
VREF
GND
Signal Inputs
Test Point
GND
Test Point
GND
Test Point
Test Point Test Point
Test Point
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 17
2.4.2.2 TRANSIENT RESPONSES
This inverting summing amplifier was built, and its responses were measured. A
MCP6021 op amp, 1% resistors, and 5% capacitors were used. Notice how close the
measured and simulate d data ar e.
2.4.2.2.1 Transient Step Response
In Bench Measurement:
•Set V
IN with a step amplitude of 1.4V and a center voltage of 2.5V. (i.e. VIN starts
0.7V below center and ends 0.7V above center)
• The measured step response is shown in Figure 2-15. It is a signal with a step
amplitude of 4.2V and a cen ter voltage of 2.5V. (i.e. VOUT start s 2.1V above center
and ends 2.1V below center)
FIGURE 2-15: Measured Step Resp onse.
Note: The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VIN = 3.2V
VOUT = 0.4V
VREF = 2.5V
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 18 © 2007 Microchip Technology Inc.
In the Mindi™ Amplifier Designer:
•Set V
IN with a step amplitude of 1.4V and a center vo ltage of 2.5V. (i.e. VIN starts
0.7V below center and ends 0.7V above center)
• The output step response is shown in Figure 2-16. It is a signal with a step
amplitude of 4.2V and a cen ter voltage of 2.5V. (i.e. VOUT start s 2.1V above center
and ends 2.1V below center)
FIGURE 2-16: Simulated Step Response.
Note: The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VIN = 3.2V
VOUT = 0.4V
VREF = 2.5V
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 19
2.4.2.2.2 Transient Sine Wave Response
In Bench Measurement:
•Set V
IN as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
1.4V and a center voltage of 2.5V
• The measured sine wave response is shown in Figure 2-17. It is a sine wave
signal with a frequency of 100.0 Hz, a peak-to-peak voltage of 4.2V and a center
voltage of 2.5V
FIGURE 2-17: Measured Sine Wave Response.
Note: The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VIN
VOUT
VREF
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 20 © 2007 Microchip Technology Inc.
In the Mindi™ Amplifier Designer:
•Set V
IN as a sine wave with a frequency of 100.0 Hz, a peak-to-peak voltage of
1.4V and a center voltage of 2.5V
• The simulated sine wave response is sh own in Figure 2-18. It is a sine wave
signal with a frequency of 100.0 Hz, a peak-to-peak voltage of 4.2V and a center
voltage of 2.5V
FIGURE 2-18: Simulated Sine Wave Response.
Note: The center voltage of VIN is set at VREF = VDD/2 (For VDD = 5.0V,
VREF = 2.5V)
VOUT
VIN VREF
Installation and Operation
© 2007 Microchip Technology Inc. DS51668A-page 21
2.4.3 Amplifier Modifications Using 8-Pin SOIC Op Amps
There are two options available to use single op amps in SOIC-8 packages
(150 mil wide):
• Soldering onto the MCP6XXX Amplifier Evaluation Board 2, or
• Soldering it onto a separate board which is con nected to the DIP-8 socket
Figure 2-19 shows a SOIC-8 op amp soldered onto the MCP6XXX Amplifier Evaluation
Board 2.
FIGURE 2-19: Op Amp in SOIC-8 package soldered onto MCP6XXX Amplifier
Evaluation Board 2.
Figure 2-20 shows a SOIC-8 op amp and a DIP-8 socket, soldered onto the 8-Pin
SOIC/MSOP/TSSOP/DIP Evaluation Board available from Microchip Technology Inc.
(order # SOIC8EV). The two interconnect strips on the bottom are Samtec part #
BBS-14-T -B or equivalent and are soldered into the through holes for the DIP-8 socket.
Figure 2-21 shows this board plugged into the MCP6XXX Amplifier Evaluation Board
2.
Note: The DIP-8 socket must be empty; only one op amp can be used at a time.
Solder an SOIC-8
Op Amp onto the
board
The PDIP socket
(U1) must be empty.
Note: Insert the interconnect strips into the DIP-8 socket on the MCP6XXX
Amplifier Evaluation Board 2. Place the SOIC8EV board on the top of the
interconnect strips with the same pin orientation. Now solder the strips to
the top board; this procedure ensures correct alignment of the strips. Clip
the pins flush with the top surface of the SOIC8EV board, then solder the
SOIC-8 op amp on the top.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 22 © 2007 Microchip Technology Inc.
FIGURE 2-20: Op Amp in SOIC-8 package soldered to a separate board.
FIGURE 2-21: Connecting Adaptor Board onto MCP6XXX Amplifier Evaluation
Board 2.
(Front View) (Back View)
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page 23
Appendix A. Schematic and Layouts
A.1 INTRODUCTION
This appendix contains the following schematics and layouts for the MCP6XXX Ampli-
fier Evaluation Board 2:
• Board – Schematic
• Board – Top Silk Layer
• Board – Top Metal Layer
• Board – Bottom Metal Layer
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 24 © 2007 Microchip Technology Inc.
A.2 BOARD - SCHEMATIC
31
M
Schematic and Layouts
© 2007 Microchip Technology Inc. DS51668A-page 25
A.3 BOARD - TOP SILK LAYER
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 26 © 2007 Microchip Technology Inc.
A.4 BOARD - TOP METAL LAYER
Schematic and Layouts
© 2007 Microchip Technology Inc. DS51668A-page 27
A.5 BOARD - BOTTOM METAL LAYER
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 28 © 2007 Microchip Technology Inc.
NOTES:
MCP6XXX AMPLIFIER EVALUATION
BOARD 2 USER’S GUIDE
© 2007 Microchip Technology Inc. DS51668A-page 29
Appendix B. Bill of Materials (BOM)
B.1 MCP6XXX AMPLIFIER EVALUATION BOARD 2 BOM
The Bill of Materials (BOM) in Table B-1 corresponds to Figure 2-1 and Figure 2-2.
Unpopulated parts are in Table B-2.
TABLE B-1: BILL OF MATERIALS (102-00148R1) (NOTE 1)
Qty Reference Description Manufacturer Part Number
1 CP1 Capacitor Ceramic 1 µF 10%
25V X5R 0805 Panasonic®- ECG ECJ-2FB1E105K
4 CR1, CR2, CU1,
CU2 Capacitor Ceramic 0.1 µF 10%
25V X7R 0805 Panasonic- ECG ECJ-2VB1E104K
1 DP1 Zener Diode, 6.2V 350mW
SOT-23 Fairchild Semiconductor®BZX84C6V2
4 Ea Corner Bumper clear 0.375X 15” Dome Richco Plastic Co RBS-12
2 J1, J2 Connector Header Breakaway
0.100 04POS STR AMP®/Tyco® Electronics 9-146258-0-02
1 PCB RoHS Compliant Bare PCB,
MCP6XXX Amplifier Evaluation
Board 2
— 104-00148
28 Pin Sockets Pin Recpt, 0.015/.025 dia., 0667
SER Mill-Max®0667-0-15-01-30-27-10-0
2 RR1, RR2 Resistor 20.0 kΩ, 1/8W, 1%,
0805 SMD Panasonic- ECG ERJ-6ENF2002V
2 Shunts for J1, J2 Socket,Short Blks w/Tab Blk Jameco, Valuepro 2012JH-R
14 Test Points PC Test Point, Compact,
Surface Mount Keystone Electronics®5016
1 UR1 MCP6021 SOT-23-5, Single Op
Amp Microchip Technology Inc MCP6021T-E/OT
1 U1 IC Socket, 8-position DIP, Tin AMP/Tyco Electronics 2-641260-1
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
MCP6XXX Amplifier Evaluation Board 2 User’s Guide
DS51668A-page 30 © 2007 Microchip Technology Inc.
TABLE B-2: BILL OF MATERIALS – UNPOPULATED PARTS (102-00148R1)
The BOM in Table B-3 corresponds to the collection of resistors, capacitors, jumpers
and MCP6021 op amps that come in the Accessory Bag which is shipped in the
MCP6XXX Amplifier Evaluation Board 2 Kit. These components are placed in an
separate ESD bag. They support the circuit in Section 2.4.1 “Building the Amplifier”.
Customers need to provide the resistors and capacitors for more amplifier circuits.
TABLE B-3: BILL OF MATERIALS – ACCESSORY BAG PART S (102-00148R1)
Qty Reference Description Manufacturer Part Number
1 U1 MCP6021, PDIP-8, Single Op
Amp Microchip Technology Inc MCP6021-E/P
1 U2 MCP6021, SOIC-8, Single Op
Amp Microchip Technology Inc MCP6021-E/SN
15 R1-R7, RISO, RL
C1-C5, CL Not populated when shipped to
customer ——
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
Qty Reference Description Manufacturer Part Number
1 Accessory Bag CAP CER 56PF 50V C0G
RADIAL Murata Electronics RPE5C1H560J2P1Z03B
1 Accessory Bag JUMPER ZERO OHM 1/8W Yageo Corporation ZOR-12-B-52
1 Accessory Bag RES 2.00K OHM 1/4W 1%
METAL FILM Yageo Corporation MFR-25FBF-2K00
5 Accessory Bag RES 7.87K OHM 1/4W 1%
METAL FILM Yageo Corporation MFR-25FBF-7K87
1 ESD Sample Box MCP6021, Single Op Amp,
PDIP-8 Mi crochip Technology Inc. MCP6021-E/P
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
Bill of Materials (BOM)
© 2007 Microchip Technology Inc. DS51668A-page 31
NOTES:
DS51668A-page 32 © 2007 Microchip Technology Inc.
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