ADS1100
SBAS239B – MAY 2002 – REVISED NOVEMBER 2003
www.ti.com
DESCRIPTION
The ADS1100 is a precision, continuously self-calibrating
Analog-to-Digital (A/D) converter with differential inputs and
up to 16 bits of resolution in a small SOT23-6 package.
Conversions are performed ratiometrically, using the power
supply as the reference voltage. The ADS1100 uses an
I2C-compatible serial interface and operates from a single
power supply ranging from 2.7V to 5.5V.
The ADS1100 can perform conversions at rates of 8, 16, 32,
or 128 samples per second. The onboard Programmable
Gain Amplifier (PGA), which offers gains of up to 8, allows
smaller signals to be measured with high resolution. In
single-conversion mode, the ADS1100 automatically powers
down after a conversion, greatly reducing current consump-
tion during idle periods.
The ADS1100 is designed for applications requiring high-
resolution measurement, where space and power consump-
tion are major considerations. Typical applications include
portable instrumentation, industrial process control, and smart
transmitters.
FEATURES
COMPLETE DATA ACQUISITION SYSTEM IN A
TINY SOT23-6 PACKAGE
16-BITS NO MISSING CODES
INL: 0.0125% of FSR MAX
CONTINUOUS SELF-CALIBRATION
SINGLE-CYCLE CONVERSION
PROGRAMMABLE GAIN AMPLIFIER
GAIN = 1, 2, 4, OR 8
LOW NOISE: 4µVp-p
PROGRAMMABLE DATA RATE: 8SPS to 128SPS
INTERNAL SYSTEM CLOCK
I2CTM INTERFACE
POWER SUPPLY: 2.7V to 5.5V
LOW CURRENT CONSUMPTION: 90µA
AVAILABLE IN EIGHT DIFFERENT ADDRESSES
APPLICATIONS
PORTABLE INSTRUMENTATION
INDUSTRIAL PROCESS CONTROL
SMART TRANSMITTERS
CONSUMER GOODS
FACTORY AUTOMATION
TEMPERATURE MEASUREMENT
I2C is a registered trademark of Philips Incorporated.
Copyright © 2002-2003, Texas Instruments Incorporated
Self-Calibrating, 16-Bit
ANALOG-TO-DIGITAL CONVERTER
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
∆Σ A/D
Converter I
2
C
Interface
Clock
Oscillator
V
IN+
V
IN
SCL
SDA
V
DD
GND
A = 1, 2, 4, or 8
PGA
AD0
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
All trademarks are the property of their respective owners.
ADS1100
2SBAS239B
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VDD to GND ........................................................................... 0.3V to +6V
Input Current ............................................................... 100mA, Momentary
Input Current ................................................................. 10mA, Continuous
Voltage to GND, VIN+, VIN.......................................................... 0.3V to VDD + 0.3V
Voltage to GND, SDA, SCL .....................................................0.5V to 6V
Maximum Junction Temperature ................................................... +150°C
Operating Temperature .................................................. 40°C to +125°C
Storage Temperature...................................................... 60°C to +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NOTE: (1) Stresses above those listed under Absolute Maximum Ratings may
cause permanent damage to the device. Exposure to absolute maximum
conditions for extended periods may affect device reliability.
ABSOLUTE MAXIMUM RATINGS ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas
Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper han-
dling and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
SPECIFIED
PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT
PRODUCT I2C ADDRESS PACKAGE-LEAD DESIGNATOR(1) RANGE MARKING NUMBER MEDIA, QUANTITY
ADS1100 1001 000 SOT23-6 DBV 40°C to +85°C AD0 ADS1100A0IDBVT Tape and Reel, 250
"" " " " "ADS1100A0IDBVR Tape and Reel, 3000
ADS1100 1001 001 SOT23-6 DBV 40°C to +85°C AD1 ADS1100A1IDBVT Tape and Reel, 250
"" " " " "ADS1100A1IDBVR Tape and Reel, 3000
ADS1100 1001 010 SOT23-6 DBV 40°C to +85°C AD2 ADS1100A2IDBVT Tape and Reel, 250
"" " " " "ADS1100A2IDBVR Tape and Reel, 3000
ADS1100 1001 011 SOT23-6 DBV 40°C to +85°C AD3 ADS1100A3IDBVT Tape and Reel, 250
"" " " " "ADS1100A3IDBVR Tape and Reel, 3000
ADS1100 1001 100 SOT23-6 DBV 40°C to +85°C AD4 ADS1100A4IDBVT Tape and Reel, 250
"" " " " "ADS1100A4IDBVR Tape and Reel, 3000
ADS1100 1001 101 SOT23-6 DBV 40°C to +85°C AD5 ADS1100A5IDBVT Tape and Reel, 250
"" " " " "ADS1100A5IDBVR Tape and Reel, 3000
ADS1100 1001 110 SOT23-6 DBV 40°C to +85°C AD6 ADS1100A6IDBVT Tape and Reel, 250
"" " " " "ADS1100A6IDBVR Tape and Reel, 3000
ADS1100 1001 111 SOT23-6 DBV 40°C to +85°C AD7 ADS1100A7IDBVT Tape and Reel, 250
"" " " " "ADS1100A7IDBVR Tape and Reel, 3000
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
PACKAGE/ORDERING INFORMATION
Top View SOT23
PIN CONFIGURATION
NOTE: Marking text direction indicates pin 1. Marking text depends on I
2
C
address; see ordering table. Marking for I
2
C address 1001000 shown.
AD0
123
654
V
IN+
GND SCL
V
IN
V
DD
SDA
ADS1100 3
SBAS239B www.ti.com
ADS1100
PARAMETER CONDITIONS MIN TYP MAX UNITS
ANALOG INPUT
Full-Scale Input Voltage (VIN+) (VIN)±VDD/PGA V
Analog Input Voltage VIN+, VIN to GND GND 0.2 VDD + 0.2 V
Differential Input Impedance 2.4/PGA M
Common-Mode Input Impedance 8M
SYSTEM PERFORMANCE
Resolution and No Missing Codes DR = 00 12 12 Bits
DR = 01 14 14 Bits
DR = 10 15 15 Bits
DR = 11 16 16 Bits
Conversion Rate DR = 00 104 128 184 SPS
DR = 01 26 32 46 SPS
DR = 10 13 16 23 SPS
DR = 11 6.5 8 11.5 SPS
Output Noise See Typical Characteristic Curves
Integral Nonlinearity DR = 11, PGA = 1, End Point Fit(1) ±0.003 ±0.0125 % of FSR(2)
Offset Error ±2.5/PGA ±5/PGA mV
Offset Drift PGA = 1 1.5 8 µV/°C
PGA = 2 1.0 4 µV/°C
PGA = 4 0.7 2 µV/°C
PGA = 8 0.6 2 µV/°C
Gain Error 0.01 0.1 %
Gain Error Drift 2 ppm/°C
Common-Mode Rejection At DC, PGA = 8 94 100 dB
At DC, PGA = 1 85 dB
DIGITAL INPUT/OUTPUT
Logic Level
VIH 0.7 VDD 6V
VIL GND 0.5 0.3 VDD V
VOL IOL = 3mA GND 0.4 V
Input Leakage
IIH VIH = 5.5V 10 µA
IIL VIL = GND 10 µA
POWER-SUPPLY REQUIREMENTS
Power-Supply Voltage VDD 2.7 5.5 V
Supply Current Power Down 0.05 2 µA
Active Mode 90 150 µA
Power Dissipation VDD = 5.0V 450 750 µW
VDD = 3.0V 210 µW
NOTES: (1) 99% of full-scale. (2) FSR = Full-Scale Range = 2 VDD/PGA.
ELECTRICAL CHARACTERISTICS
All specifications at 40°C to +85°C, VDD = 5V, GND = 0V, and all PGAs, unless otherwise noted.
ADS1100
4SBAS239B
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TYPICAL CHARACTERISTICS
At TA = 25°C and VDD = 5V, unless otherwise noted.
120
100
80
60
40
I
VDD
(µA)
SUPPLY CURRENT vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
V
DD
= 5V
V
DD
= 2.7V
SUPPLY CURRENT vs I
2
C BUS FREQUENCY
250
225
200
175
150
125
100
75
50 10 100 1k 10k
I
2
C Bus Frequency (kHz)
I
VDD
(µA)
125°C
25°C
40°C
2.0
1.0
0.0
1.0
2.0
Offset Error (mV)
OFFSET ERROR vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
PGA = 8 PGA = 4 PGA = 2 PGA = 1
VDD = 5V
2.0
1.0
0.0
1.0
2.0
Offset Error (mV)
OFFSET ERROR vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
PGA = 8 PGA = 4 PGA = 2 PGA = 1
VDD = 2.7V
0.04
0.03
0.02
0.01
0.00
0.01
0.02
0.03
0.04
Gain Error (%)
GAIN ERROR vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
PGA = 8 PGA = 4 PGA = 1
PGA = 2
VDD = 5V
0.010
0.005
0.000
0.005
0.010
0.015
0.020
Gain Error (%)
GAIN ERROR vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
PGA = 8
PGA = 4
PGA = 1
PGA = 2
VDD = 2.7V
ADS1100 5
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TYPICAL CHARACTERISTICS (Cont.)
At TA = 25°C and VDD = 5V, unless otherwise noted.
TOTAL ERROR vs INPUT SIGNAL
Total Error (mV)
0.0
0.5
1.0
1.5
2.0
2.5
100 75 50 25 0 25 50 75 100
Input Signal (% of Full-Scale)
PGA = 8
PGA = 4
PGA = 2
PGA = 1 Data Rate = 8SPS
INTEGRAL NONLINEARITY vs SUPPLY VOLTAGE
0.016
0.014
0.012
0.010
0.008
0.006
0.004
0.002
0.000
Integral Nonlinearity (% of FSR)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
PGA = 8
PGA = 4
PGA = 2
PGA = 1
VDD = 2.7V
VDD = 5V
VDD = 3.5V
0.05
0.04
0.03
0.02
0.01
0.00
Integral Nonlinearity (% of FSR)
INTEGRAL NONLINEARITY vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
PGA =1
20
15
10
5
0
Noise (p-p, % of LSB)
NOISE vs INPUT SIGNAL
0 20406080100
Input Signal (% of Full-Scale)
PGA = 8
PGA = 4
PGA = 2
PGA = 1
Data Rate = 8SPS
PGA = 8
PGA = 4
PGA = 2
PGA = 1
NOISE vs SUPPLY VOLTAGE
30
25
20
15
10
5
0
Noise (p-p, % of LSB)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (V)
Data Rate = 8SPS
NOISE vs TEMPERATURE
25
20
15
10
5
Noise (p-p, % of LSB)
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
Data Rate = 8SPS
PGA = 8
ADS1100
6SBAS239B
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THEORY OF OPERATION
The ADS1100 is a fully differential, 16-bit, self-calibrating,
delta-sigma A/D converter. Extremely easy to design with
and configure, the ADS1100 allows you to obtain precise
measurements with a minimum of effort.
The ADS1100 consists of a delta-sigma A/D converter core with
adjustable gain, a clock generator, and an I2C interface. Each of
these blocks are described in detail in the sections that follow.
ANALOG-TO-DIGITAL CONVERTER
The ADS1100 A/D converter core consists of a differential
switched-capacitor delta-sigma modulator followed by a digital
filter. The modulator measures the voltage difference between
the positive and negative analog inputs and compares it to a
reference voltage, which, in the ADS1100, is the power
supply. The digital filter receives a high-speed bitstream from
the modulator and outputs a code, which is a number
proportional to the input voltage.
OUTPUT CODE CALCULATION
The output code is a scalar value that is (except for clipping)
proportional to the voltage difference between the two analog
inputs. The output code is confined to a finite range of numbers;
this range depends on the number of bits needed to represent the
code. The number of bits needed to represent the output code for
the ADS1100 depends on the data rate, as shown in Table I.
TYPICAL CHARACTERISTICS (Cont.)
At TA = 25°C and VDD = 5V, unless otherwise noted.
V
DD
= 2.7V
V
DD
= 5V
10
9
8
7
6
Data Rate (SPS)
DATA RATE vs TEMPERATURE
60 40 20 0 20 40 60 80 100 120 140
Temperature (°C)
Data Rate = 8SPS
0
20
40
60
80
100
Gain (dB)
FREQUENCY RESPONSE
0.1 1 10 100 1k
Input Frequency (Hz)
Data Rate = 8SPS
DATA RATE NUMBER OF BITS MINIMUM CODE MAXIMUM CODE
8SPS 16 32,768 32,767
16SPS 15 16,384 16,383
32SPS 14 8192 8191
128SPS 12 2048 2047
TABLE I. Minimum and Maximum Codes.
For a minimum output code of Min Code, gain setting of
PGA, positive and negative input voltages of VIN+ and VIN,
and power supply of VDD, the output code is given by the
expression:
Output Code = 1Min CodePGA V
IN+
(
)
(
)
V
V
IN
DD
In the previous expression, it is important to note that the
negated
minimum
output code is used. The ADS1100 outputs codes in
binary twos complement format, so the absolute values of the
minima and maxima are not the same; the maximum n-bit code
is 2n-1 1, while the minimum n-bit code is 1 2n-1.
For example, the ideal expression for output codes with a
data rate of 16SPS and PGA = 2 is:
Output Code =16384 2V
IN+
(
)
(
)
V
V
IN
DD
The ADS1100 outputs all codes right-justified and sign-
extended. This makes it possible to perform averaging on the
higher data rate codes using only a 16-bit accumulator.
See Table II for output codes for various input levels.
SELF-CALIBRATION
The previous expressions for the ADS1100s output code do
not account for the gain and offset errors in the modulator. To
compensate for these, the ADS1100 incorporates self-cali-
bration circuitry.
The self-calibration system operates continuously, and re-
quires no user intervention. No adjustments can be made to
the self-calibration system, and none need to be made. The
self-calibration system cannot be deactivated.
The offset and gain error figures shown in the Electrical
Characteristics include the effects of calibration.
ADS1100 7
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CLOCK GENERATOR
The ADS1100 features an onboard clock generator, which
drives the operation of the modulator and digital filter. The
Typical Characteristics show varieties in data rate over
supply voltage and temperature.
It is not possible to operate the ADS1100 with an external
modulator clock.
INPUT IMPEDANCE
The ADS1100 uses a switched-capacitor input stage. To
external circuitry, it looks roughly like a resistance. The
resistance value depends on the capacitor values and the
rate at which they are switched. The switching frequency is
the same as the modulator frequency; the capacitor values
depend on the PGA setting. The switching clock is generated
by the onboard clock generator, so its frequency, nominally
275kHz, is dependent on supply voltage and temperature.
The common-mode and differential input impedances are
different. For a gain setting of PGA, the differential input
impedance is typically:
2.4M/PGA
The common-mode impedance is typically 8M.
The typical value of the input impedance often cannot be
neglected. Unless the input source has a low impedance, the
ADS1100s input impedance may affect the measurement accu-
racy. For sources with high output impedance, buffering may be
necessary. Bear in mind, however, that active buffers introduce
noise, and also introduce offset and gain errors. All of these
factors should be considered in high-accuracy applications.
Because the clock generator frequency drifts slightly with
temperature, the input impedances will also drift. For many
applications, this input impedance drift can be neglected, and
the typical impedance values above can be used.
ALIASING
If frequencies are input to the ADS1100 that exceed half the
data rate, aliasing will occur. To prevent aliasing, the input
signal must be bandlimited. Some signals are inherently
bandlimited. For example, a thermocouples output, which
has a limited rate of change, may nevertheless contain noise
and interference components. These can fold back into the
sampling band just as any other signal can.
The ADS1100s digital filter provides some attenuation of
high-frequency noise, but the filters sinc1 frequency re-
sponse cannot completely replace an anti-aliasing filter;
some external filtering may still be needed. For many appli-
cations, a simple RC filter will suffice.
DATA RATE NEGATIVE FULL-SCALE 1LSB ZERO +1LSB POSITIVE FULL-SCALE
8SPS 8000HFFFFH0000H0001H7FFFH
16SPS C000HFFFFH0000H0001H3FFFH
32SPS E000HFFFFH0000H0001H1FFFH
128SPS F800HFFFFH0000H0001H07FFH
TABLE II. Output Codes for Different Input Signals.
INPUT SIGNAL
When designing an input filter circuit, remember to take into
account the interaction between the filter network and the
input impedance of the ADS1100.
USING THE ADS1100
OPERATING MODES
The ADS1100 operates in one of two modes: continuous
conversion and single conversion.
In continuous conversion mode, the ADS1100 continuously
performs conversions. Once a conversion has been com-
pleted, the ADS1100 places the result in the output register,
and immediately begins another conversion. When the
ADS1100 is in continuous conversion mode, the ST/BSY bit
in the configuration register always reads 1.
In single conversion mode, the ADS1100 waits until the
ST/BSY bit in the conversion register is set to 1. When this
happens, the ADS1100 powers up and performs a single
conversion. After the conversion completes, the ADS1100
places the result in the output register, resets the ST/BSY bit
to 0 and powers down. Writing a 1 to ST/BSY while a
conversion is in progress has no effect.
When switching from continuous conversion mode to single
conversion mode, the ADS1100 will complete the current
conversion, reset the ST/BSY bit to 0 and power down.
RESET AND POWER-UP
When the ADS1100 powers up, it automatically performs a
reset. As part of the reset, the ADS1100 sets all of the bits
in the configuration register to their default setting.
The ADS1100 responds to the I2C General Call Reset
command. When the ADS1100 receives a General Call
Reset, it performs an internal reset, exactly as though it had
just been powered on.
I2C INTERFACE
The ADS1100 communicates through an I2C (Inter-Inte-
grated Circuit) interface. The I2C interface is a 2-wire open-
drain interface supporting multiple devices and masters on a
single bus. Devices on the I2C bus only drive the bus lines
LOW, by connecting them to ground; they never drive the
bus lines HIGH. Instead, the bus wires are pulled HIGH by
pull-up resistors, so the bus wires are HIGH when no device
is driving them LOW. This way, two devices cannot conflict;
if two devices drive the bus simultaneously, there is no driver
contention.
ADS1100
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Communication on the I2C bus always takes place between
two devices, one acting as the master and the other acting
as the slave. Both masters and slaves can read and write,
but slaves can only do so under the direction of the master.
Some I2C devices can act as masters or slaves, but the
ADS1100 can only act as a slave device.
An I2C bus consists of two lines, SDA and SCL. SDA carries
data; SCL provides the clock. All data is transmitted across
the I2C bus in groups of eight bits. To send a bit on the I2C
bus, the SDA line is driven to the bits level while SCL is LOW
(a LOW on SDA indicates the bit is zero; a HIGH indicates
the bit is one). Once the SDA line has settled, the SCL line
is brought HIGH, then LOW. This pulse on SCL clocks the
SDA bit into the receivers shift register.
The I2C bus is bidirectional: the SDA line is used both for
transmitting and receiving data. When a master reads from
a slave, the slave drives the data line; when a master sends
to a slave, the master drives the data line. The master always
drives the clock line. The ADS1100 never drives SCL,
because it cannot act as a master. On the ADS1100, SCL is
an input only.
Most of the time the bus is idle, no communication is taking
place, and both lines are HIGH. When communication is
taking place, the bus is active. Only master devices can start
a communication. They do this by causing a start condition
on the bus. Normally, the data line is only allowed to change
state while the clock line is LOW. If the data line changes
state while the clock line is HIGH, it is either a start condition
or its counterpart, a stop condition. A start condition is when
the clock line is HIGH and the data line goes from HIGH to
LOW. A stop condition is when the clock line is HIGH and the
data line goes from LOW to HIGH.
After the master issues a start condition, it sends a byte that
indicates which slave device it wants to communicate with.
This byte is called the address byte. Each device on an I2C
bus has a unique 7-bit address to which it responds. (Slaves
can also have 10-bit addresses; see the I2C specification for
details.) The master sends an address in the address byte,
together with a bit that indicates whether it wishes to read
from or write to the slave device.
Every byte transmitted on the I2C bus, whether it be address
or data, is acknowledged with an acknowledge bit. When a
master has finished sending a byte, eight data bits, to a
slave, it stops driving SDA and waits for the slave to acknowl-
edge the byte. The slave acknowledges the byte by pulling
SDA LOW. The master then sends a clock pulse to clock the
acknowledge bit. Similarly, when a master has finished
reading a byte, it pulls SDA LOW to acknowledge this to the
slave. It then sends a clock pulse to clock the bit. (Remember
that the master always drives the clock line.)
A not-acknowledge is performed by simply leaving SDA
HIGH during an acknowledge cycle. If a device is not present
on the bus, and the master attempts to address it, it will
receive a not-acknowledge because no device is present at
that address to pull the line LOW.
When a master has finished communicating with a slave, it
may issue a stop condition. When a stop condition is issued,
the bus becomes idle again. A master may also issue
another start condition. When a start condition is issued while
the bus is active, it is called a repeated start condition.
A timing diagram for an ADS1100 I2C transaction is shown in
Figure 1. Table III gives the parameters for this diagram.
ADS1100 I2C ADDRESSES
The ADS1100 I2C address is 1001aaa, where aaa are bits
set at the factory. The ADS1100 is available in eight different
verisons, each having a different I2C address. For example,
the ADS1100A0 has address 1001000, and the ADS1100A3
has address 1001011. See the Package/Ordering Informa-
tion table for a complete listing.
The I2C address is the only difference between the eight
variants. In all other repsects, they operate identically.
Each variant of the ADS1100 is marked with ADx, where x
identifies the address variant. For example, the ADS1100A0 is
marked AD0, and the ADS1100A3 is marked AD3. See the
Package/Ordering Information table for a complete listing.
When the ADS1100 was first introduced, it was shipped with
only one address, 1001000, and was marked BAAI. That
device is identical to the currently shipping ADS1100A0
variant marked AD0.
SCL
SDA
t(LOW) tRtFt(HDSTA)
t(HDSTA) t(HDDAT)
t(BUF)
t(SUDAT)
t(HIGH) t(SUSTA) t(SUSTO)
PS S P
FIGURE 1. I2C Timing Diagram.
ADS1100 9
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I2C GENERAL CALL
The ADS1100 responds to General Call Reset, which is an
address byte of 00H followed by a data byte of 06H. The
ADS1100 acknowledges both bytes.
On receiving a General Call Reset, the ADS1100 performs a
full internal reset, just as though it had been powered off and
then on. If a conversion is in process, it is interrupted; the
output register is set to zero, and the configuration register is
set to its default setting.
The ADS1100 always acknowledges the General Call ad-
dress byte of 00H, but it does not acknowledge any General
Call data bytes other than 04H or 06H.
I2C DATA RATES
The I2C bus operates in one of three speed modes: Stan-
dard, which allows a clock frequency of up to 100kHz; Fast,
which allows a clock frequency of up to 400kHz; and High-
speed mode (also called Hs mode), which allows a clock
frequency of up to 3.4MHz. The ADS1100 is fully compatible
with all three modes.
No special action needs to be taken to use the ADS1100 in
Standard or Fast modes, but High-speed mode must be
activated. To activate High-speed mode, send a special
address byte of 00001XXX following the start condition,
where the XXX bits are unique to the Hs-capable master.
This byte is called the Hs master code. (Note that this is
different from normal address bytes: the low bit does not
indicate read/write status.) The ADS1100 will not acknowl-
edge this byte; the I2C specification prohibits acknowledg-
ment of the Hs master code. On receiving a master code, the
ADS1100 will switch on its High-speed mode filters, and will
communicate at up to 3.4MHz. The ADS1100 switches out of
Hs mode with the next stop condition.
For more information on High-speed mode, consult the I2C
specification.
REGISTERS
The ADS1100 has two registers that are accessible via its I2C
port. The output register contains the result of the last conver-
sion; the configuration register allows you to change the
ADS1100s operating mode and query the status of the device.
OUTPUT REGISTER
The 16-bit output register contains the result of the last
conversion in binary twos complement format. Following
reset or power-up, the output register is cleared to zero; it
remains zero until the first conversion is completed. There-
fore, if you read the ADS1100 just after reset or power-up,
you will read zero from the output register.
The output registers format is shown in Table IV.
CONFIGURATION REGISTER
You can use the 8-bit configuration register to control the
ADS1100s operating mode, data rate, and PGA settings.
The configuration registers format is shown in Table V. The
default setting is 8CH.
FAST MODE HIGH-SPEED MODE
PARAMETER MIN MAX MIN MAX UNITS
SCLK Operating Frequency f(SCLK) 0.4 3.4 MHz
Bus Free Time Between STOP and START Condition t(BUF) 600 160 ns
Hold Time After Repeated START Condition. t(HDSTA) 600 160 ns
After this period, the first clock is generated.
Repeated START Condition Setup Time t(SUSTA) 600 160 ns
STOP Condition Setup Time t(SUSTO) 600 160 ns
Data Hold Time t(HDDAT) 00ns
Data Setup Time t(SUDAT) 100 10 ns
SCLK Clock LOW Period t(LOW) 1300 160 ns
SCLK Clock HIGH Period t(HIGH) 600 60 ns
Clock/Data Fall Time tF300 160 ns
Clock/Data Rise Time tR300 160 ns
TABLE III. Timing Diagram Definitions.
BIT 1514131211109876543210
NAME D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
TABLE IV. Output Register.
BIT 7 654321 0
NAME ST/BSY 0 0 SC DR1 DR0 PGA1 PGA0
TABLE V. Configuration Register.
Bit 7: ST/BSY
The meaning of the ST/BSY bit depends on whether it is
being written to or read from.
In single conversion mode, writing a 1 to the ST/BSY bit
causes a conversion to start, and writing a 0 has no effect.
In continuous conversion mode, the ADS1100 ignores the
value written to ST/BSY.
ADS1100
10 SBAS239B
www.ti.com
When read in single conversion mode, ST/BSY indicates whether
the A/D converter is busy taking a conversion. If ST/BSY is read
as 1, the A/D converter is busy, and a conversion is taking
place; if 0, no conversion is taking place, and the result of the
last conversion is available in the output register.
In continuous mode, ST/BSY is always read as 1.
Bits 6-5: Reserved
Bits 6 and 5 must be set to zero.
Bit 4: SC
SC controls whether the ADS1100 is in continuous conver-
sion or single conversion mode. When SC is 1, the ADS1100
is in single conversion mode; when SC is 0, the ADS1100 is
in continuous conversion mode. The default setting is 0.
Bits 3-2: DR
Bits 3 and 2 control the ADS1100s data rate, as shown in
Table VI.
Bits 1-0: PGA
Bits 1 and 0 control the ADS1100s gain setting, as shown in
Table VII.
READING FROM THE ADS1100
You can read the output register and the contents of the
configuration register from the ADS1100. To do this, address
the ADS1100 for reading, and read three bytes from the
device. The first two bytes are the output registers contents;
the third byte is the configuration registers contents.
You do not always have to read three bytes from the
ADS1100. If you want only the contents of the output regis-
ter, read only two bytes.
Reading more than three bytes from the ADS1100 has no
effect. All of the bytes beginning with the fourth will be FFH.
See Figure 2 for a timing diagram of an ADS1100 read
operation.
WRITING TO THE ADS1100
You can write new contents into the configuration register
(you cannot change the contents of the output register). To
do this, address the ADS1100 for writing, and write one byte
to it. This byte is written into the configuration register.
Writing more than one byte to the ADS1100 has no effect.
The ADS1100 will ignore any bytes sent to it after the first
one, and it will only acknowledge the first byte.
See Figure 3 for a timing diagram of an ADS1100 write
operation.
DR1 DR0 DATA RATE
0 0 128SPS
0 1 32SPS
1 0 16SPS
1(1) 1(1) 8SPS(1)
NOTE: (1) Default Setting.
TABLE VI. DR Bits.
PGA1 PGA0 GAIN
0(1) 0(1) 1(1)
01 2
10 4
11 8
NOTE: (1) Default Setting.
TABLE VII. PGA Bits.
ADS1100 11
SBAS239B www.ti.com
Frame 1: I
2
C Slave Address Byte Frame 2: Configuration Register
1
Start By
Master ACK By
ADS1100 ACK By
ADS1100
1919
SDA
SCL
001
A2 A1 A0 R/W
ST/
BSY
0 0 SC DR1 DR0
PGA1 PGA0
Stop By
Master
FIGURE 3. Timing Diagram for Writing to the ADS1100.
Frame 1: I
2
C Slave Address Byte Frame 2: Output Register Upper Byte
Start By
Master ACK By
ADS1100 ACK By
Master
From
ADS1100
From
ADS1100
1919
SDA
SCL
SDA
(Continued)
SCL
(Continued)
1 0 0 1 A2 A1 A0 R/W D15 D14 D13 D12 D11 D10 D9 D8
Frame 3: Output Register Lower Byte Frame 4: Configuration Register
(Optional)
ACK By
Master Stop By
Master
ACK By
Master
From
ADS1100
191
D7 D6 D5 D4 D3 D2 D1 D0
ST/
BSY
0 0 SC DR1 DR0
PGA1 PGA0
9
FIGURE 2. Timing Diagram for Reading From the ADS1100.
ADS1100
12 SBAS239B
www.ti.com
APPLICATIONS INFORMATION
The sections that follow give example circuits and tips for
using the ADS1100 in various situations.
An evaluation board, the ADS1100EVM, is available. This
small, simple board connects to an RS-232 serial port on
almost any PC. The supplied software simulates a digital
voltmeter, and also displays raw output codes in hex and
decimal. All features of the ADS1100 can be controlled from
the main window. For more information, contact TI or your
local TI representative, or visit the Texas Instruments website
at http://www.ti.com/.
BASIC CONNECTIONS
For many applications, connecting the ADS1100 is extremely
simple. A basic connection diagram for the ADS1100 is
shown in Figure 4.
The fully differential voltage input of the ADS1100 is ideal for
connection to differential sources with moderately low source
impedance, such as bridge sensors and thermistors. Al-
though the ADS1100 can read bipolar differential signals, it
cannot accept negative voltages on either input. It may be
helpful to think of the ADS1100 positive voltage input as non-
inverting, and of the negative input as inverting.
When the ADS1100 is converting, it draws current in short
spikes. The 0.1µF bypass capacitor supplies the momentary
bursts of extra current needed from the supply.
The ADS1100 interfaces directly to standard mode, fast
mode, and high-speed mode I2C controllers. Any
microcontrollers I2C peripheral, including master-only and
non-multiiple-master I2C peripherals, will work with the
ADS1100. The ADS1100 does not perform clock-stretching
(i.e., it never pulls the clock line low), so it is not necessary
to provide for this unless other devices are on the same I2C
bus.
Pull-up resistors are necessary on both the SDA and SCL
lines because I2C bus drivers are open-drain. The size of
these resistors depends on the bus operating speed and
capacitance of the bus lines. Higher-value resistors consume
less power, but increase the transition times on the bus,
limiting the bus speed. Lower-value resistors allow higher
speed at the expense of higher power consumption. Long
bus lines have higher capacitance and require smaller pull-
up resistors to compensate. The resistors should not be too
small; if they are, the bus drivers may not be able to pull the
bus lines low.
CONNECTING MULTIPLE DEVICES
Connecting multiple ADS1100s to a single bus is almost
trivial. The ADS1100 is available in eight different ver-
sions, each of which has a different I2C address. An
example showing three ADS1100s connected on a single
bus is shown in Figure 5. Up to eight ADS1100s (provided
their addresses are different) can be connected to a single
bus.
Note that only one set of pull-up resistors is needed per bus.
You might find that you need to lower the pull-up resistor
values slightly to compensate for the additional bus capaci-
tance presented by multiple devices and increased line
length.
1
2
3
6
5
4
V
IN+
GND
4.7µF (typ.)
SCL
V
IN
V
DD
V
DD
V
DD
Positive Input
(0V to 5V) Negative Input
(0V to 5V)
SDA
SDA
SCL
ADS1100
Microcontroller or
Microprocessor
with I
2
C Port
I
2
C Pull-Up Resistors
1k to 10k (typ.)
FIGURE 4. Typical Connections of the ADS1100.
ADS1100 13
SBAS239B www.ti.com
USING GPIO PORTS FOR I2C
Most microcontrollers have programmable input/output pins
that can be set in software to act as inputs or outputs. If an
I2C controller is not available, the ADS1100 can be con-
nected to GPIO pins, and the I2C bus protocol simulated, or
bit-banged, in software. An example of this for a single
ADS1100 is shown in Figure 6.
Note that no pull-up resistor is shown on the SCL line. In this
simple case, the resistor is not needed; the microcontroller
can simply leave the line on output, and set it to one or zero
as appropriate. It can do this because the ADS1100 never
drives its clock line low. This technique can also be used with
multiple devices, and has the advantage of lower current
consumption due to the absence of a resistive pull-up.
If there are any devices on the bus that may drive their clock
lines low, the above method should not be used; the SCL line
should be high-Z or zero and a pull-up resistor provided as
usual. Note also that this cannot be done on the SDA line in
any case, because the ADS1100 does drive the SDA line low
from time to time, as all I2C devices do.
Some microcontrollers have selectable strong pull-up circuits
built in to their GPIO ports. In some cases, these can be
switched on and used in place of an external pull-up resistor.
Weak pull-ups are also provided on some microcontrollers,
but usually these are too weak for I2C communication. If
there is any doubt about the matter, test the circuit before
committing it to production.
SINGLE-ENDED INPUTS
Although the ADS1100 has a fully differential input, it can
easily measure single-ended signals. A simple single-ended
connection scheme is shown in Figure 7. The ADS1100 is
configured for single-ended measurement by grounding ei-
ther of its input pins, usually VIN, and applying the input
signal to VIN+. The single-ended signal can range from 0.2V
to VDD + 0.3V. The ADS1100 loses no linearity anywhere in
its input range. Negative voltages cannot be applied to this
circuit because the ADS1100 inputs can only accept positive
voltages.
1
2
3
6
5
4
VIN+
GND
SCL
VIN
VDD
VDD
SDA
SDA
SCL
ADS1100A0
1
2
3
6
5
4
VIN+
GND
SCL
VIN
VDD
SDA
ADS1100A1
1
2
3
6
5
4
VIN+
GND
SCL
VIN
VDD
SDA
ADS1100A2
Microcontroller or
Microprocessor
with I2C Port
I2C Pull-Up Resistors
1k to 10k (typ.)
NOTE: ADS1100 power
and input connections
omitted for clarity.
FIGURE 5. Connecting Multiple ADS1100s.
1
2
3
6
5
4
V
IN+
GND
SCL
V
IN
V
DD
SDA
SDA
SCL
V
DD
Microcontroller or
Microprocessor
with I
2
C Port
NOTE: ADS1100 power
and input connections
omitted for clarity.
ADS1100
FIGURE 6. Using GPIO with a Single ADS1100.
1
2
3
6
5
4
VIN+
GND
SCL
VIN
VDD
0V - VDD
Single-Ended
Filter Capacitor
33pF to 100pF
(typ.)
Output
Codes
0-32767
SDA
ADS1100
VDD
FIGURE 7. Measuring Single-Ended Inputs.
Bit-banging I2C with GPIO pins can be done by setting the
GPIO line to zero and toggling it between input and output
modes to apply the proper bus states. To drive the line low,
the pin is set to output a zero; to let the line go high, the pin
is set to input. When the pin is set to input, the state of the
pin can be read; if another device is pulling the line low, this
will read as a zero in the ports input register.
The ADS1100 input range is bipolar differential with respect
to the reference, i.e. ±VDD. The single-ended circuit shown in
Figure 7 covers only half the ADS1100 input scale because
it does not produce differentially negative inputs; therefore,
one bit of resolution is lost. The Burr-Brown DRV134 bal-
anced line driver from Texas Instruments can be employed
to regain this bit for single-ended signals.
ADS1100
14 SBAS239B
www.ti.com
Negative input voltages must be level-shifted. A good candi-
date for this function is the Texas Instruments THS4130
differential amplifier, which can output fully differential sig-
nals. This device can also help recover the lost bit noted
previously for single-ended positive signals. Level shifting
can also be performed using the DRV134.
LOW-SIDE CURRENT MONITOR
Figure 8 shows a circuit for a low-side shunt-type current
monitor. The circuit reads the voltage across a shunt resistor,
which is sized as small as possible while still giving a readable
output voltage. This voltage is amplified by an OPA335 low-
drift op-amp, and the result is read by the ADS1100.
WHEATSTONE BRIDGE SENSOR
The ADS1100 has a fully differential high-impedance input
stage and internal gain circuitry, which makes it a good
candidate for bridge-sensor measurement. An example is
shown in Figure 9.
FIGURE 8. Low-Side Current Measurement.
ADS1100
5V
V
11.5k
I2C
1k RS(2)
Load
(PGA Gain = 8)
5V FS
FS = 0.63V
G = 12.5
NOTE: (1) Pull-down resistor to allow accurate swing to 0V.
(2) RS is sized for a 50mV drop at full-scale current.
5V
R3(1)
49.9k
5V
OPA335
It is suggested that the ADS1100 be operated at a gain of 8. The
gain of the OPA335 can then be set lower. For a gain of 8, the
op amp should be set up to give a maximum output voltage of
no greater than 0.75V. If the shunt resistor is sized to provide
a maximum voltage drop of 50mV at full-scale current, the
full-scale input to the ADS1100 is 0.63V.
1
2
3
6
5
4
V
IN+
GND
SCL 4.7µF
V
IN
V
DD
Bridge
Sensor
E
E+
VV+
SDA
ADS1100
I
2
C I/O
V
DD
V
DD
FIGURE 9. Measuring a Wheatstone Bridge Sensor.
The Wheatstone bridge sensor is connected directly to the
ADS1100 without intervening instrumentation amplifiers; a
single, small input capacitor provides rejection of high-fre-
quency interference. The excitation voltage of the bridge is
the power supply, which is also the ADS1100 reference
voltage. The measurement is, therefore, ratiometric. In this
circuit, the ADS1100 would typically be operated at a gain of
8. The input range in this case is ±0.75 volts.
ADS1100 15
SBAS239B www.ti.com
Many resistive bridge sensors, such as strain gauges, have
very small full-scale output ranges. For these sensors, the
measurement resolution obtainable without additional ampli-
fication can be low. For example, if the bridge sensor output
is ±20mV, the ADS1100 outputs codes from approximately
873 to +873, resulting in a best-case resolution of around 11
bits. If higher resolution is required, it is best to supply an
external instrumentation amplifier to bring the signal to full
scale.
ADVICE
The ADS1100 is fabricated in a small-geometry low-voltage
process. The analog inputs feature protection diodes to the
supply rails. However, the current-handling ability of these
diodes is limited, and the ADS1100 can be permanently
damaged by analog input voltages that remain more than
approximately 300mV beyond the rails for extended periods.
One way to protect against overvoltage is to place current-
limiting resistors on the input lines. The ADS1100 analog
inputs can withstand momentary currents of as large as
10mA.
The previous paragraph does not apply to the I2C ports,
which can both be driven to 6V regardless of the supply.
If the ADS1100 is driven by an op amp with high voltage
supplies, such as ±12V, protection should be provided, even
if the op amp is configured so that it will not output out-of-
range voltages. Many op amps seek to one of the supply rails
immediately when power is applied, usually before the input
has stabilized; this momentary spike can damage the ADS1100.
Sometimes this damage is incremental and results in slow,
long-term failurewhich can be distastrous for permanently
installed, low-maintenance systems.
If you use an op amp or other front-end circuitry with the
ADS1100, be sure to take the performance characteristics of this
circuitry into account. A chain is only as strong as its weakest link.
LAYOUT TIPS
PCB layout for the ADS1100 is relatively undemanding.
16-bit performance is not difficult to achieve.
Any data converter is only as good as its reference. For the
ADS1100, the reference is the power supply, and the power
supply must be clean enough to achieve the desired perfor-
mance. If a power-supply filter capacitor is used, it should be
placed close to the VDD pin, with no vias placed between the
capacitor and the pin. The trace leading to the pin should be as
wide as possible, even if it must be necked down at the device.
PACKAGE OPTION ADDENDUM
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Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
ADS1100A0IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A0IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A0IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A0IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A1IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A1IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A1IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A1IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A2IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A2IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A2IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A2IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A3IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A3IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A3IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A3IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A4IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
PACKAGE OPTION ADDENDUM
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Addendum-Page 2
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
ADS1100A4IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A4IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A4IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A5IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A5IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A6IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A6IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A6IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A6IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
ADS1100A7IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A7IDBVRG4 ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A7IDBVT ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
ADS1100A7IDBVTG4 ACTIVE SOT-23 DBV 6 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
PACKAGE OPTION ADDENDUM
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Addendum-Page 3
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
ADS1100A0IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A0IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A1IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A1IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A2IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A2IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A3IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A3IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A4IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A4IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A5IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A6IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A6IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A7IDBVR SOT-23 DBV 6 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
ADS1100A7IDBVT SOT-23 DBV 6 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
PACKAGE MATERIALS INFORMATION
www.ti.com 15-Dec-2011
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
ADS1100A0IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A0IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A1IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A1IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A2IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A2IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A3IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A3IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A4IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A4IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A5IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A6IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A6IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
ADS1100A7IDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0
ADS1100A7IDBVT SOT-23 DBV 6 250 180.0 180.0 18.0
PACKAGE MATERIALS INFORMATION
www.ti.com 15-Dec-2011
Pack Materials-Page 2