Low-power delta-sigma ADC offers features to reduce system cost and component count

The ADS122C04 is a precision, 24-bit, ADC from Texas Instruments that provides many integrated features to decrease system cost and component count in applications measuring small sensor signals. The device highlights two differential or four single-ended inputs through a flexible input MUX, a low-noise, PGA, two programmable excitation current sources, a voltage reference, an oscillator, and a precision temperature sensor. The device can perform conversions at data rates up to 2000SPS with single-cycle settling. At 20SPS, the digital filter offers simultaneous 50Hz and 60Hz rejection for noisy industrial applications. The internal PGA provides gains up to 128. This PGA makes the device ideal for applications measuring small sensor signals, such as thermocouples, thermistors, RTDs, and resistive bridge sensors. The device features a two-wire, I2C-compatible interface that supports I2C bus speeds up to 1Mbps. Two address pins allow selection of 16 different I2C addresses for the device.