ADS1253

ADS1253 ADS1253 SBAS199B – MAY 2001 – REVISED SEPTEMBER 2007 24-Bit, 20kHz, Low-Power ANALOG-TO-DIGITAL CONVERTER FEATURES q 24 BITS—NO MISSING CODES q 19 BITS EFFECTIVE RESOLUTION UP TO 20kHz DATA RATE q LOW NOISE: 1.8ppm q FOUR DIFFERENTIAL INPUTS q INL: 15ppm (max) q EXTERNAL REFERENCE (0.5V to 5V) q POWER-DOWN MODE q SYNC MODE q LOW POWER: 8mW at 20kHz 5mW at 10kHz APPLICATIONS q CARDIAC DIAGNOSTICS q DIRECT THERMOCOUPLE INTERFACES q BLOOD ANALYSIS q INFRARED PYROMETERS q LIQUID/GAS CHROMATOGRAPHY q PRECISION PROCESS CONTROL DESCRIPTION The ADS1253 is a precision, wide dynamic range, deltasigma, Analog-to-Digital (A/D) converter with 24-bit resolution operating from a single +5V supply. The delta-sigma architecture is used for wide dynamic range and 24 bits of no missing code performance. An effective resolution of 19 bits (1.8ppm of rms noise) is achieved for conversion rates up to 20kHz. The ADS1253 is designed for high-resolution measurement applications in cardiac diagnostics, smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation. The converter includes a flexible, 2-wire synchronous serial interface for low-cost isolation. The ADS1253 is a 4-channel converter and is offered in an SSOP-16 package. CH1+ CH1– CH2+ CH2– CH3+ CH3– CH4+ CH4– ADS1253 MUX 4th-Order ∆Σ Modulator Digital Filter Serial Interface Control VREF CLK SCLK DOUT/DRDY +VDD GND CHSEL0 CHSEL1 Please be aware that an important notice concern...