AD8400ARZ1

The AD8400ARZ1 is a single-channel, 256-position digital potentiometer from Analog Devices. It provides a digitally controlled variable resistor function that replaces mechanical potentiometers in a wide range of applications. The device features a linear taper with 1 kΩ end-to-end resistance and 256 tap points, allowing precise resistance adjustment via a 3-wire SPI-compatible serial interface with a 10 MHz update rate.

The device operates from a single 2.7V to 5.5V supply and is qualified for automotive applications. It features a power shutdown mode drawing less than 5 µA, making it suitable for power-sensitive designs. The AD8400ARZ1 is offered in a compact 8-SOIC surface-mount package with gull-wing terminations, suitable for space-constrained PCB layouts.

Typical applications include mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching, and power supply adjustment. The volatile memory type means the wiper position resets to the default on power-up, which should be considered in system design.

Channel-to-channel resistance matching is ±1%, and the nominal temperature coefficient is 500 ppm/°C. The device is qualified for automotive applications, supporting its use in demanding environments.