The AD8400/AD8402/AD8403 are 1-/2-/4-channel digital potentiometers with 256-position variable resistance. They can replace 1, 2, or 4 potentiometers.
The AD8400/AD8402/AD8403 family provides single‑, dual‑, and quad‑channel digital potentiometers. Each device contains a fixed resistor with a programmable wiper that can be set via an SPI‑compatible 3‑wire serial interface. The parts offer 256‑position (8‑bit) resolution, low shutdown current (<5 µA), and operate from a single 2.7 V to 5.5 V supply.
These devices are offered in SOIC‑8, SOIC‑14, PDIP, and thin‑TSSOP packages and are rated for an industrial temperature range of –40 °C to +125 °C. Typical applications include mechanical potentiometer replacement, programmable filters, volume control, line‑impedance matching, and power‑supply adjustment.
| Resolution | 8 bits |
|---|---|
| Nominal Resistance Options | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ |
| Power Supply Range | 2.7 V to 5.5 V (single‑supply) |
Each device provides 8‑bit (256‑position) resolution.
They are guaranteed to operate from –40 °C to +125 °C.