Texas Instruments ADS1112 Handleiding

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FEATURES

DCOMPLETE DATA ACQUISITION SYSTEM IN

THE MSOP-10 AND LEADLESS QFN-STYLE

PACKAGES

DMEASUREMENTS FROM TWO DIFFERENTIAL

CHANNELS OR THREE SINGLE-ENDED

CHANNELS

DI

2

CINTERFACE—EIGHT ADDRESSES PIN-

SELECTABLE

DONBOARD REFERENCE:

Accuracy: 2.048V ±0.05%

Drift: 5ppm/°C

DONBOARD PGA

DONBOARD OSCILLATOR

D16 BITS, NO MISSING CODES

DINL: 0.01% of FSR max

DCONTINUOUS SELF-CALIBRATION

DSINGLE-CYCLE CONVERSION

DPROGRAMMABLE DATA RATE: 15SPS to

240SPS

DPOWER SUPPLY: 2.7V to 5.5V

DLOW CURRENT CONSUMPTION: 240µA

APPLICATIONS

DPORTABLE INSTRUMENTATION

DINDUSTRIAL PROCESS CONTROL

DSMART TRANSMITTERS

DCONSUMER GOODS

DFACTORY AUTOMATION

DTEMPERATURE MEASUREMENT

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.

All trademarks are the property of their respective owners.

ADS1112

SBAS282D − JUNE 2003 − REVISED MARCH 2004

16-Bit Analog-to-Digital Converter with

Input Multiplexer and Onboard Reference

www.ti.com

Copyright  2003−2004, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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