AD7798/AD7799 is a 3-channel, low noise, low power, 16-/24-bit, Σ-Δ ADC with on-chip in-amp, supporting 3-wire serial SPI®, QSPI™, MICROWIRE™ and DSP compatible Schmitt trigger.
The AD7798 and AD7799 are precision analog‑to‑digital converters offering 16‑ or 24‑bit resolution, low RMS noise, and programmable gain. They include an on‑chip instrumentation amplifier, low‑side power switch, reference detect, and programmable digital outputs, all housed in a 16‑lead TSSOP package.
These devices target applications such as weigh scales, pressure measurement, strain‑gauge transducers, gas analysis, industrial process control, portable instrumentation, and blood analysis. They operate from a 2.7 V to 5.25 V supply over a temperature range of –40 °C to +105 °C.
| Power supply voltage | 2.7 V to 5.25 V |
|---|---|
| Output update rate | 4.17 Hz to 470 Hz |
| RMS noise (AD7798 at 4.17 Hz) | 40 nV |
| Typical supply current (AD7798) | 300 WA typical |
| Operating temperature range | -40 °C to +105 °C |
| Package type | 16‑lead TSSOP |
The device operates from 2.7 V to 5.25 V.
The output update rate can be programmed between 4.17 Hz and 470 Hz.
The RMS noise is 40 nV at 4.17 Hz.
It operates from –40 °C to +105 °C.