AD7788/AD7789 are low power, 16/24-bit sigma-delta ADCs with 2.5V to 5.25V operation, 1µA power consumption, and 1.5µV RMS noise.
The AD7788 and AD7789 are low‑power, low‑noise sigma‑delta analog‑to‑digital converters designed for precision measurement applications such as smart transmitters, battery monitors, and weighing scales. The devices operate from a single supply and include an internal clock, offering simultaneous 50 Hz/60 Hz line‑frequency rejection.
Key features include 16‑bit (AD7788) or 24‑bit (AD7789) resolution, 1 pA power‑down current, a 10‑lead MSOP package, and a 3‑wire serial interface compatible with SPI, QSPI, Microwire, and DSP protocols. Detailed specifications, timing characteristics, and pin functions are provided for designers.
| Resolution (AD7788) | 16‑bit |
|---|---|
| Resolution (AD7789) | 24‑bit |
| Power‑down current | 1 pA max |
| Output update rate | 16.6 Hz nominal |
| Integral nonlinearity | 3.5 ppm typical |
The devices update their output at a nominal rate of 16.6 Hz.
In power‑down mode the current consumption is only 1 pA maximum.
The ADCs are supplied in a 10‑lead MSOP package.