16bit ADC runs from as little as 315µA or 2.3V


TI-ADS112C04

Called ADS112C04, it is a ΣΔ device that will run from supplies between 2.3 and 5.5 V over -40 to +125°C.

Interfacing on the digital side is I2C-compatible two-wire at up to 1Mbit/s, with  two address pins that allow selection of 16 different I2C addresses for the device, according to Mouser, which is stocking the device.

On the analogue side, it has two differential or four single-ended inputs through an input multiplexer, two programmable excitation current sources (10μA to 1.5mA), and a programmable gain amplifier.

There is also a voltage reference (2.048V, typ 5ppm/°C), a clock oscillator, and a precision temperature sensor (typ 0.5°C accuracy).

Two conversion modes – single-shot or continuous – can convert at rates up to 2,000sample/s with single cycle settling.

At 20sample/s, the device’s digital filter offers simultaneous 50Hz and 60Hz rejection for noisy industrial applications. At this rate, TI claims it has “16-Bit, noise-free resolution” (see ‘Features’ here).

Packaging is 5.0 x 4.40mm TSSOP.

Development support comes through the ADS112C04EVM evaluation board and Delta-Sigma ADC EvaluaTIon software.

Applications are expected measuring small sensor signals with: resistance temperature detectors, thermocouples, thermistors, resistive bridge sensors, and in medical monitoring.

The diagram shows a K-Type thermocouple circuit.

 



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