ADS1251

ADS1251 ADS1251 SBAS184D – MARCH 2001 – REVISED JUNE 2009 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: 1.5ppm q 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 ADS1251 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 features wide dynamic range, and 24 bits of no missing code performance. Effective resolution of 19 bits (1.5ppm of rms noise) is achieved at conversion rates up to 20kHz. The ADS1251 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 ADS1251 is a single-channel converter and is offered in an SO-8 package. It is pin-compatible with the faster ADS1252 (41.7kHz data rate). ADS1251 +VIN –VIN 4th-Order ∆Σ Modulator Digital Filter Serial Interface Control VREF CLK SCLK DOUT/DRDY +VDD GND Please be aware that an important notice con...