AD8403AR100

The AD8403AR100 is a quad-channel digital potentiometer from Analog Devices, offering four independent 100kOhm variable resistors with 256-tap resolution. It uses a 3-wire SPI-compatible serial interface for digital control, allowing precise adjustment of resistance values. The device operates from a single supply voltage of 2.7V to 5.5V and features a linear taper configuration. It is designed for surface-mount assembly in a 24-SOIC package with a 7.50mm body width.

Each potentiometer channel provides a resistance range of 0 to 100kOhms with a tolerance of ±30% and a typical temperature coefficient of 500 ppm/°C. The device includes a cascade pin for daisy-chaining multiple devices, and supports a 10 MHz data update rate. The wiper settings are volatile, meaning they are lost when power is removed.

Typical applications include mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching, and power supply adjustment. The wide operating temperature range of -40°C to 125°C makes it suitable for industrial and automotive environments.

The AD8403AR100 is supplied in a 24-lead SOIC package and is RoHS3 compliant. It is a direct replacement for mechanical potentiometers in many electronic circuits, offering improved reliability and programmability.