AD5255 is a 3-channel digital potentiometer with nonvolatile memory. It has a full-scale resistance of 25 kΩ or 250 kΩ and can operate in single-supply or dual-supply mode.
The AD5255 provides three digitally controlled variable resistors: two 512‑position channels and one 128‑position channel, with full‑scale resistance options of 25 kΩ or 250 kΩ. It features nonvolatile EEPROM that retains wiper settings and offers linear or logarithmic increment/decrement modes.
Designed for industrial use, the device operates from –40 °C to +85 °C, supports single‑supply (2.7 V‑5.5 V) or dual‑supply (+2.25 V‑+2.75 V) operation, and includes 256 bytes of general‑purpose EEPROM plus 11 bytes of RDAC EEPROM. Typical applications include LED brightness control, programmable gain, and laser diode driver calibration.
| Supply voltage (single‑supply) | 2.7 V to 5.5 V |
|---|---|
| Supply voltage (dual‑supply) | +2.25 V to +2.75 V |
| Temperature coefficient (potentiometer divider) | 15 ppm/°C |
| Temperature coefficient (rheostat mode) | 35 ppm/°C |
| Data retention (EEPROM) | 100 years at 55 °C |
| Number of channels | 3 (dual 512‑position, single 128‑position) |
| Package | 24‑lead TSSOP |
| Operating temperature range | ‑40 °C to +85 °C |
| EEPROM size | 256 bytes general‑purpose, 11 bytes RDAC |
It can operate from a single supply of 2.7 V to 5.5 V or from a dual supply of +2.25 V to +2.75 V.
The device provides two 512‑position channels and one 128‑position channel.
Yes, its nonvolatile memory retains the wiper settings when power is removed.
The EEPROM is rated for a typical data retention of 100 years at 55 °C.