ADS1242

ADS1242 ® ADS1243 ® ADS1242 ADS1243 SBAS235H – DECEMBER 2001 – REVISED OCTOBER 2013 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q 24 BITS NO MISSING CODES q SIMULTANEOUS 50Hz AND 60Hz REJECTION (–90dB MINIMUM) q 0.0015% INL q 21 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128) q PGA GAINS FROM 1 TO 128 q SINGLE-CYCLE SETTLING q PROGRAMMABLE DATA OUTPUT RATES q EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 5V q ON-CHIP CALIBRATION q SPI™ COMPATIBLE q 2.7V TO 5.25V SUPPLY RANGE q 600µW POWER CONSUMPTION q UP TO EIGHT INPUT CHANNELS q UP TO EIGHT DATA I/O APPLICATIONS q INDUSTRIAL PROCESS CONTROL q LIQUID /GAS CHROMATOGRAPHY q BLOOD ANALYSIS q SMART TRANSMITTERS q PORTABLE INSTRUMENTATION q WEIGHT SCALES VDD VDD 2µA DESCRIPTION The ADS1242 and ADS1243 are precision, wide dynamic range, delta-sigma, analog-to-digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These delta-sigma, A/D converters provide up to 24 bits of no missing code performance and effective resolution of 21 bits. The input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit digital-to-analog converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range). The Programmable Gain Amplifier (PGA) provides selectable gain...