FEATURES

24 BITS—NO MISSING CODES

19 BITS EFFECTIVE RESOLUTION UP TO

20kHz DATA RATE

LOW NOISE: 1.8ppm

FOUR DIFFERENTIAL INPUTS

INL: 15ppm (max)

EXTERNAL REFERENCE (0.5V to 5V)

POWER-DOWN MODE

SYNC MODE

LOW POWER: 4mW at 20kHz

SEPARATE DIGITAL INTERFACE SUPPLY 1.8V

to 3.6V

APPLICATIONS

CARDIAC DIAGNOSTICS

DIRECT THERMOCOUPLE INTERFACES

BLOOD ANALYSIS

INFRARED PYROMETERS

LIQUID/GAS CHROMATOGRAPHY

PRECISION PROCESS CONTROL

DESCRIPTION

The ADS1254 is a precision, wide dynamic range, deltasigma,

Analog-to-Digital (A/D) converter with 24-bit resolution.

The delta-sigma architecture is used for wide dynamic

range and to ensure 24 bits of no missing codes performance.

An effective resolution of 19 bits (1.8ppm of rms

noise) is achieved for conversion rates up to 20kHz.

The ADS1254 is designed for high-resolution measurement

applications in cardiac diagnostics, smart transmitters, industrial

process control, weight scales, chromatography, and

portable instrumentation. The converter includes a flexible,

two-wire synchronous serial interface for low-cost isolation.

The ADS1254 is a multi-channel converter and is offered in

an SSOP-20 package.