AD7788/AD7789 are low power, 16-/24-bit Sigma-Delta ADCs. They feature a wide power supply range, low power consumption, high resolution, low noise, and high linearity. They are suitable for smart transmitters, battery applications, portable instrumentation, sensor measurement, temperature measurement, pressure measurement, and weigh scales.
The AD7788 (16‑bit) and AD7789 (24‑bit) are low‑power, low‑noise sigma‑delta analog‑to‑digital converters designed for low‑frequency measurement applications such as smart transmitters, battery monitors, temperature and pressure sensors, and 4‑20 mA loops. They operate from a single 2.5 V to 5.25 V supply, consume as little as 75 µA in normal mode and 1 µA in power‑down, and are available in a 10‑lead MSOP package.
Key features include 1.5 pV RMS noise, 16.6 Hz output update rate, 19‑bit peak‑to‑peak resolution for the AD7789, and extensive on‑chip registers for flexible configuration. The devices provide simultaneous 50 Hz and 60 Hz line‑frequency rejection, internal clock oscillator, and a VOO monitor channel.
| Resolution | 16‑bit (AD7788), 24‑bit (AD7789) |
|---|---|
| Supply Voltage | 2.5 V to 5.25 V |
| Power Consumption (Normal) | 75 µA max |
| Power Consumption (Power‑down) | 1 µA max |
| RMS Noise | 1.5 pV |
| Output Update Rate | 16.6 Hz |
| Temperature Range (B grade) | -40 °C to +105 °C |
| Package | 10‑lead MSOP |
The devices operate from 2.5 V to 5.25 V.
Both parts have an RMS noise of 1.5 pV.
The ADCs provide a nominal output update rate of 16.6 Hz.
B‑grade devices are rated from –40 °C to +105 °C.