The AD5251/AD5252 are dual 64/256-position I2C nonvolatile memory digital potentiometers with 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ resistance ranges and nonvolatile memory that stores wiper setting with write protection.
The AD5251 (64‑position) and AD5252 (256‑position) are dual‑channel, I²C‑compatible digital potentiometers that replace mechanical potentiometers, trimmers, and variable resistors. They provide programmable resistance settings, non‑volatile memory for wiper positions, and commands for increment, decrement, and ±6 dB step changes, with both synchronous and asynchronous update modes.
Typical applications include LCD panel Vcom adjustment, white LED brightness control, RF base‑station power‑amp bias, sensor calibrations, and programmable gain or offset circuits. The devices are offered in TSSOP‑14 packages with resistance options of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ, and are qualified for industrial temperature ranges.
| Resolution | 64 positions (AD5251) / 256 positions (AD5252) |
|---|---|
| Supply Voltage (single‑supply) | 2.7 V to 5.5 V |
| Supply Voltage (dual‑supply) | +2.25 V to +2.75 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Data Retention | Typical 100 years (at 55 °C) |
The AD5251 provides 64 programmable positions, while the AD5252 provides 256 positions.
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.
The memory can retain data for a typical 100 years at a junction temperature of 55 °C.
Both devices are rated for operation from –40 °C to +85 °C.