General-purpose delta-sigma ADC with I2C interface

The ADS1219, from Texas Instruments, is a precision, 24-bit, ADC that incorporates all features required to implement the most common system monitoring functions, which includes supply voltage, current, and temperature monitoring. The device features two differential or four single-ended inputs through a flexible input MUX, rail-to-rail input buffers, a programmable gain stage, a voltage reference, and an oscillator. The device includes buffers that provide high-impedance sources to be directly connected to the device. A gain stage follows the buffers which gives selectable gains of 1 and 4. The device can perform conversions at data rates as high as 1000SPS with single-cycle settling. At 20SPS, the digital filter offers simultaneous 50Hz and 60Hz rejection for noisy industrial applications. The device features a two-wire, I2C-compatible interface that supports I2C bus speeds up to 1Mbps. Sixteen different I2C addresses can be selected for the device via two address pins. The device is provided in a leadless 16-pin WQFN or a 16-pin TSSOP package and is specified over a temperature range of –40C to +125C.