MAX5403EUB+

Overview

The MAX5403EUB+ is a dual digital potentiometer from the MAX5403/MAX5404/MAX5405 family, manufactured by Analog Devices (Maxim Integrated). It integrates one 3-terminal potentiometer and one 2-terminal variable resistor within a single 10-pin µMAX package. The device operates on a single supply voltage ranging from +2.7V to +5.5V with an ultra-low supply current of 0.1µA. Each potentiometer offers 256 tap positions controlled via a 3-wire SPI-compatible serial interface. The MAX5403 variant specifically provides a nominal end-to-end resistance of 10kΩ. Key electrical characteristics include a low end-to-end temperature coefficient of 35ppm/°C and a ratiometric temperature coefficient of 5ppm/°C.

Feature Summary

• Dual configuration: One 3-terminal potentiometer and one 2-terminal variable resistor
• 256-tap resolution with glitchless switching between resistor taps
• Ultra-low supply current of 0.1µA at VDD = +2.7V
• Power-on reset (POR) sets wiper to midscale position (Position 128)
• Low drift: 35ppm/°C end-to-end and 5ppm/°C ratiometric temperature coefficients

Applications

• Mechanical potentiometer replacement
• Low-drift programmable gain amplifier (PGA)
• Adjustable voltage reference circuits
• Programmable filters, delays, and time constants
• Impedance matching networks

Procurement Notes

Verify the component marking and datasheet revision against the official Analog Devices documentation for the MAX5403EUB+. Confirm that the specific ordering suffix corresponds to the standard µMAX package variant. Ensure compliance with RoHS directives as indicated in the manufacturer's environmental information.

Selection Notes

Select the MAX5403EUB+ when a 10kΩ resistance value is required. Choose this part over the MAX5404 (50kΩ) or MAX5405 (100kΩ) based on circuit impedance requirements. Consider the 10-pin µMAX package dimensions for PCB layout constraints. Verify that the volatile memory type meets system power-loss retention needs.

Part Context

The MAX5403EUB+ belongs to the MAX5403/MAX5404/MAX5405 family of dual linear taper digital potentiometers. These devices are designed to replace discrete mechanical potentiometers in applications requiring digitally controlled resistance. The family shares identical pinouts and control interfaces, differing primarily in the nominal end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ respectively.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include the MAX5404EUB+ (50kΩ) and MAX5405EUB+ (100kΩ), provided the resistance value adjustment is acceptable for the application.