What this digital potentiometer is and where it fits
The Analog Devices MAX5421BEUB+ is a single-channel, 4-tap digital potentiometer with a 15kΩ end-to-end resistance and a linear taper characteristic. It uses a parallel interface for wiper position control and operates from a single 5V supply or dual ±5V rails. The volatile memory means the wiper setting resets to the midscale position at power-up, which suits calibration and trim applications where the initial condition is known. Packaged in a compact 10-uMAX/uSOP surface-mount package, it is rated for the industrial temperature range of -40°C to 85°C, making it appropriate for factory automation, instrumentation, and power-supply trimming in benign or conditioned environments.
Key ratings and what they mean for the BOM
The 15kΩ resistance is the full-scale value between the high and low terminals; the wiper resistance is typically 500Ω.
Lifecycle and sourcing posture
The MAX5421BEUB+ carries an Active product status with ROHS3 compliance.