AD5251/AD5252 is a digital potentiometer produced by Analog Devices. It has 64-bit/256-bit resolution and can be selected in four resistance ranges of 1kΩ, 10kΩ, 50kΩ and 100kΩ. It has a non-volatile memory that stores potentiometer settings. It supports I2C interface and can read and write potentiometer through I2C interface.
The AD5251 and AD5252 are dual‑channel, I²C‑compatible, non‑volatile digital potentiometers offering 64‑step (AD5251) or 256‑step (AD5252) resolution. They replace mechanical potentiometers in applications such as LCD Vcom adjustment, LED brightness control, and sensor calibration, providing programmable gain, offset, and voltage‑to‑current conversion.
The document includes functional block diagrams, pin descriptions, timing specifications, absolute maximum ratings, and an ordering guide for the TSSOP‑14 packaged parts. Electrical characteristics such as supply voltage ranges, resolution, resistance tolerance, and data‑retention are listed, along with typical performance curves.
| Resolution (AD5251) | 6 bits |
|---|---|
| Resolution (AD5252) | 8 bits |
| Package | TSSOP‑14 |
| Data retention | 100 years |
| Endurance (write cycles) | 100 k cycles |
The AD5251 provides 64 discrete positions.