Delta-Sigma ADC has required features for common system monitoring functions

The Texas Instruments ADS1119 is a precision, 16-bit ADC that incorporates all features required to implement the most common system monitoring functions, such as 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 enable high-impedance sources to be directly connected to the device. A gain stage follows the buffers which offer 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 1 Mbps. Sixteen different I2C addresses can be chosen 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.