AD5280/AD5282 is a single-channel and dual-channel, 256-position, digitally controlled variable resistor (VR) that can be used in multimedia, video, audio, communications, instrumentation, programmable voltage source, programmable current source and line impedance matching applications.
The AD5280 (single‑channel) and AD5282 (dual‑channel) are 256‑position, I2C‑compatible digital potentiometers with selectable fixed terminal resistances of 20 kΩ, 50 kΩ or 200 kΩ and a temperature coefficient of 30 ppm/°C. They operate from a +10 V to +15 V single supply or ±5.5 V dual‑supply and include programmable logic outputs and a shutdown function.
The document details electrical characteristics, absolute maximum ratings, thermal resistance, pin configurations, typical performance curves, and an ordering guide. It also covers interface timing, test circuits, and application information such as using the devices for gain control, programmable voltage/current sources, and impedance matching.
| Supply Voltage Range | +10 V to +15 V single supply; ±5.5 V dual‑supply |
|---|---|
| Fixed Terminal Resistance Options | 20 kΩ, 50 kΩ, 200 kΩ |
| Temperature Coefficient | 30 ppm/°C |
| Resolution | 8 bits |
| Number of Channels | 1 channel (AD5280) or 2 channels (AD5282) |
| Operating Temperature Range | -40 °C to +85 °C |
| Shutdown Current (ISHDN) | 5 µA |
The devices operate from +10 V to +15 V with a single supply or ±5.5 V with a dual supply.
Both parts have an 8‑bit resolution.
The fixed terminal resistance can be 20 kΩ, 50 kΩ, or 200 kΩ.
They are specified for operation from –40 °C to +85 °C.