The ADS122U04 is a precision, 24-bit,
analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and
component count in applications measuring small sensor signals. The device features two
differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise,
programmable gain amplifier (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 2000 samples-per-second (SPS) with
single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection
for noisy industrial applications. The internal PGA offers gains up to 128. This PGA makes the
ADS122U04 ideally suited for applications measuring small sensor signals, such
as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge
The ADS122U04 features a 2-wire, UART-compatible interface. In
applications that require galvanic isolation this universal asynchronous receiver/transmitter
(UART) interface minimizes the number of digital isolation channels, thus saving cost, board space,
The ADS122U04 is offered in a leadless 16-pin WQFN or a 16-pin
TSSOP package and is specified over a temperature range of –40°C to +125°C.