AD7794/AD7795 is a low noise, low power 6-channel 24/16-bit ∑-Δ ADC with on-chip in-amp and reference for temperature measurement and other applications.
The AD7794 and AD7795 are low‑power, low‑noise analog‑to‑digital converters offering up to 24‑bit resolution (AD7794) or 16‑bit (AD7795). They integrate a precision band‑gap reference, programmable gain instrumentation amplifier, on‑chip bias generator, and a low‑side power switch for sensor power‑down.
The devices operate from a 2.7 V to 5.25 V supply, support SPI/QSPI/MICROWIRE interfaces, and provide selectable update rates from 4.17 Hz to 470 Hz. Typical applications include temperature, pressure, weigh‑scale, strain‑gage, and other high‑precision sensor measurements.
| Power supply voltage | 2.7 V to 5.25 V |
|---|---|
| RMS noise (typical) | 40 nV @ 4.17 Hz |
| Supply current (typical) | 400 pA |
| Temperature range (B‑grade) | -40 °C to +105 °C |
| Number of differential inputs | Six |
The devices operate from 2.7 V up to 5.25 V.
Output update rates can be selected between 4.17 Hz and 470 Hz.
Each part provides six differential analog inputs.
Typical RMS noise is 40 nV at a 4.17 Hz bandwidth.