The AD5251 and AD5252 are dual‑channel, I²C‑compatible, non‑volatile memory digital potentiometers offering 64‑step (AD5251) or 256‑step (AD5252) resolution. They provide programmable resistance settings, non‑volatile storage, and support for linear increment/decrement and ±6 dB step commands, making them suitable for applications such as LED brightness control, sensor calibration, and power‑amp biasing.
The devices operate from a single 2.7 V to 5.5 V supply (or dual‑supply ±2.25 V to ±2.75 V), retain data for up to 100 years, and can be addressed on a shared I²C bus with up to four devices. Detailed electrical characteristics, timing diagrams, and ordering information are provided for design integration.
| Resolution | AD5251: 6 bits (64 steps), AD5252: 8 bits (256 steps) |
|---|---|
| Supply Voltage (single‑supply) | 2.7 V to 5.5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Resistance Tolerance | ±30 % |
| Data Retention | 100 years (typical) |
The AD5251 provides 6‑bit resolution (64 steps) and the AD5252 provides 8‑bit resolution (256 steps).
They operate from a single supply of 2.7 V to 5.5 V, or from dual supplies of +2.25 V to +2.75 V.
Two slave address decoding bits allow up to four devices to be placed on one I²C bus.
The memory retains data for a typical period of 100 years.