ADS1100
SBAS239 – MAY 2002
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
I
2
C-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, 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 consumption
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
a71 COMPLETE DATA ACQUISITION SYSTEM IN A
TINY SOT23-6 PACKAGE
a71 16-BITS NO MISSING CODES
a71 INL: 0.0125% of FSR MAX
a71 CONTINUOUS SELF-CALIBRATION
a71 SINGLE-CYCLE CONVERSION
a71 PROGRAMMABLE GAIN AMPLIFIER
GAIN = 1, 2, 4, OR 8
a71 LOW NOISE: 4µVp-p
a71 PROGRAMMABLE DATA RATE: 8SPS to 128SPS
a71 INTERNAL SYSTEM CLOCK
a71 I
2
C
TM
INTERFACE
a71 POWER SUPPLY: 2.7V TO 5.5V
a71 LOW CURRENT CONSUMPTION: 90µA
Copyright © 2002, 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.
APPLICATIONS
a71 PORTABLE INSTRUMENTATION
a71 INDUSTRIAL PROCESS CONTROL
a71 SMART TRANSMITTERS
a71 CONSUMER GOODS
a71 FACTORY AUTOMATION
a71 TEMPERATURE MEASUREMENT
∆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
BAAI
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.
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2
C is a registered trademark of Philips Incorporated.