ADS1210

ADS1210 ADS1211 ADS1210 ADS1211 ADS1211 ADS1210 ADS1211 SBAS034B – JANUARY 1996 – REVISED SEPTEMBER 2005 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q DELTA-SIGMA A/D CONVERTER q 23 BITS EFFECTIVE RESOLUTION AT 10Hz AND 20 BITS AT 1000Hz q DIFFERENTIAL INPUTS q PROGRAMMABLE GAIN AMPLIFIER q FLEXIBLE SPI™-COMPATIBLE SSI INTERFACE WITH 2-WIRE MODE q PROGRAMMABLE CUT-OFF FREQUENCY UP TO 15.6kHz q INTERNAL/EXTERNAL REFERENCE q ON-CHIP SELF-CALIBRATION q ADS1211 INCLUDES 4-CHANNEL MUX APPLICATIONS q INDUSTRIAL PROCESS CONTROL q INSTRUMENTATION q BLOOD ANALYSIS q SMART TRANSMITTERS q PORTABLE INSTRUMENTS q WEIGH SCALES q PRESSURE TRANSDUCERS AGND AVDD REFOUT DESCRIPTION The ADS1210 and ADS1211 are precision, wide dynamic range, delta-sigma Analog-to-Digital (A/D) converters with 24-bit resolution operating from a single +5V supply. The differential inputs are ideal for direct connection to transducers or low-level voltage signals. The delta-sigma architecture is used for wide dynamic range and to ensure 22 bits of no-missing-code performance. An effective resolution of 23 bits is achieved through the use of a very low-noise input amplifier at conversion rates up to 10Hz. Effective resolutions of 20 bits can be maintained up to a sample rate of 1kHz through the use of the unique Turbo modulator mode of operation. The dynamic range of the converters is further increased by providing a low-noise programmable gain amplifier with a gain range of 1 to 16 in binary steps. The ADS1...