ADS1112
SBAS282D − JUNE 2003 − REVISED MARCH 2004
16-Bit Analog-to-Digital Converter with
Input Multiplexer and Onboard Reference
FEATURES
D
COMPLETE DATA ACQUISITION SYSTEM IN
THE MSOP-10 AND LEADLESS QFN-STYLE
PACKAGES
DESCRIPTION
The ADS1112 is a precision, continuously self-calibrating
Analog-to-Digital (A/D) converter with two differential or three
single-ended channels and up to 16 bits of resolution in the
small MSOP-10 and leadless QFN-style (small-outline,
no-lead) packages. The onboard 2.048V reference provides
an input range of
±2.048V
differentially. The ADS1112 uses
an I
2
C-compatible serial interface and has two address pins
that allow a user to select one of the eight I
2
C Slave
addresses. The ADS1112 operates from a single power
supply ranging from 2.7V to 5.5V.
The ADS1112 can perform conversions at rates of 15, 30, 60,
or 240 samples per second (SPS). The onboard
programmable gain amplifier (PGA), which offers gains of up
to eight, allows smaller signals to be measured with high
resolution. In single-conversion mode, the ADS1112
automatically powers down after a conversion, greatly
reducing current consumption during idle periods.
The ADS1112 is designed for applications requiring
high-resolution measurement, where space and power
consumption are major considerations. Typical applications
include portable instrumentation, industrial process control,
and smart transmitters.
D
MEASUREMENTS FROM TWO DIFFERENTIAL
CHANNELS OR THREE SINGLE-ENDED
CHANNELS
D
I
2
CINTERFACE—EIGHT ADDRESSES PIN-
SELECTABLE
D
ONBOARD REFERENCE:
Accuracy: 2.048V
±0.05%
Drift: 5ppm/°C
ONBOARD PGA
ONBOARD OSCILLATOR
16 BITS, NO MISSING CODES
INL: 0.01% of FSR max
CONTINUOUS SELF-CALIBRATION
SINGLE-CYCLE CONVERSION
PROGRAMMABLE DATA RATE: 15SPS to
240SPS
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POWER SUPPLY: 2.7V to 5.5V
D
LOW CURRENT CONSUMPTION: 240µA
APPLICATIONS
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PORTABLE INSTRUMENTATION
INDUSTRIAL PROCESS CONTROL
SMART TRANSMITTERS
CONSUMER GOODS
FACTORY AUTOMATION
TEMPERATURE MEASUREMENT
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semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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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2003−2004, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
