AD5272/AD5274 is a digital rheostat with 1024-/256-position resolution and 1% resistor tolerance error. It features I2C interface and 50-TP memory, and is suitable for replacing mechanical rheostats. It can be used for variable gain control, gain and offset adjustment, programmable voltage to current conversions, programmable filters, delays, time constants, and more.
The AD5272 and AD5274 are single‑channel digital rheostats offering 1024‑position (AD5272) or 256‑position (AD5274) resolution, ±1 % resistor tolerance, and a 5 ppm/°C temperature coefficient. They operate from 2.7 V‑5.5 V single‑supply or ±2.5 V‑±2.75 V dual‑supply and are available in thin LFCSP or compact MSOP packages.
The datasheet provides a full set of information including functional block diagrams, electrical characteristics, interface timing specifications, absolute maximum ratings, pin descriptions, typical performance curves, test circuits, and ordering guides for the two part numbers.
| Resolution | 10 bits (1024 positions) for AD5272; 8 bits (256 positions) for AD5274 |
|---|---|
| Resistor tolerance error | ±1 % nominal |
| Temperature coefficient | 5 ppm/°C |
| Supply voltage (single‑supply) | 2.7 V to 5.5 V |
| Supply voltage (dual‑supply) | ±2.5 V to ±2.75 V |
| Package options | 10‑lead LFCSP 3 mm × 3 mm × 0.8 mm; 10‑lead MSOP 3 mm × 4.9 mm × 1.1 mm |
The AD5274 operates from 2.7 V to 5.5 V on a single supply, or ±2.5 V to ±2.75 V on a dual supply.
Both devices have a maximum nominal resistor tolerance error of ±1 %.