ADS1216

www.ti.com ADS1216 ADS1216 SBAS171D – NOVEMBER 2000 – REVISED SEPTEMBER 2006 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES 24 BITS, NO MISSING CODES 0.0015% INL 22 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128) PGA FROM 1 TO 128 SINGLE-CYCLE SETTLING MODE PROGRAMMABLE DATA OUTPUT RATES: up to 1kHz ON-CHIP 1.25V/2.5V REFERENCE EXTERNAL DIFFERENTIAL REFERENCE: 0.1V to 2.5V ON-CHIP CALIBRATION 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 ADS1216 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution 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 an 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 Converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range). The PGA (Programmable Gain Amplifier) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. ...