ADS1218

BurrĆBrown Products from Texas Instruments ADS1218 SBAS187C – SEPTEMBER 2001 – REVISED SEPTEMBER 2005 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory FEATURES 24 BITS NO MISSING CODES 0.0015% INL 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128) 4K BYTES OF FLASH MEMORY PROGRAMMABLE FROM 2.7V TO 5.25V PGA FROM 1 TO 128 SINGLE CYCLE SETTLING MODE PROGRAMMABLE DATA OUTPUT RATES UP TO 1kHz PRECISION ON-CHIP 1.25V/2.5V REFERENCE: ACCURACY: 0.2% DRIFT: 5ppm/°C EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 2.5V ON-CHIP CALIBRATION PIN-COMPATIBLE WITH ADS1216 SPI™ COMPATIBLE 2.7V TO 5.25V < 1mW POWER CONSUMPTION APPLICATIONS INDUSTRIAL PROCESS CONTROL LIQUID/GAS CHROMATOGRAPHY BLOOD ANALYSIS SMART TRANSMITTERS PORTABLE INSTRUMENTATION WEIGHT SCALES PRESSURE TRANSDUCERS DESCRIPTION The ADS1218 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution and Flash memory operating from 2.7V to 5.25V supplies. The delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 22 bits. The eight 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 (D/A) converter provides an offset correctio...