MAX5402EUA

Overview

The MAX5402EUA+ is a single-channel digital potentiometer from the µPoT series, housed in an 8-uMAX/uSOP surface-mount package. It features a resistance value of 10 kOhms with 256 taps and utilizes an SPI interface for control. The device operates on a supply voltage ranging from 2.7 V to 5.5 V, drawing current consistent with its low-power design. Key electrical parameters include a typical contact resistance of 275 Ohms, a tolerance of ±25%, and a temperature coefficient of 35 ppm/°C. It supports linear taper configurations and volatile memory storage within an operating temperature range of -40°C to +85°C.

Feature Summary

• 256-tap resolution with 10 kOhm nominal resistance
• SPI serial interface for wiper position control
• Volatile memory architecture for wiper settings
• Linear taper configuration

Applications

• Programmable gain amplifier circuits
• Voltage reference adjustment
• Power supply output trimming

Procurement Notes

Verify the specific suffix (e.g., + vs. T) to confirm packaging type, as tube and tape-and-reel variants exist. Confirm RoHS compliance status and lead-free designation against the latest manufacturer documentation before procurement.

Selection Notes

Select this component when a low-pin-count, SPI-controlled variable resistor is required. Ensure the system voltage falls within the 2.7 V to 5.5 V range. Consider the ±25% resistance tolerance if precise absolute resistance is critical, or verify that volatile memory behavior aligns with power-loss requirements.

Part Context

This part belongs to the Maxim Integrated µPoT family of digitally controlled potentiometers. It serves as a solid-state alternative to mechanical potentiometers, offering improved reliability and smaller form factors in space-constrained PCB designs.

Replacement Considerations

Check for MAX5402EUA+T for tape-and-reel packaging equivalents. Verify pinout compatibility with other 8-pin digital potentiometers if cross-brand substitution is necessary.