MAX5405EUB+T

Overview

The MAX5405EUB+T is a dual digital potentiometer from the MAX5403/MAX5404/MAX5405 family, manufactured by Analog Devices Inc./Maxim Integrated. It features one 3-terminal potentiometer and one 2-terminal variable resistor, each with 256 tap positions controlled via a 3-wire SPI-compatible serial interface. The device operates on a single supply voltage ranging from +2.7V to +5.5V with an ultra-low supply current of 0.1µA. It includes glitchless switching between taps and a power-on reset (POR) that sets the wiper to midscale at startup. The end-to-end resistance is nominally 100kΩ with a temperature coefficient of 35ppm/°C.

Feature Summary

• Dual configuration: One 3-terminal potentiometer and one 2-terminal variable resistor
• 256-tap resolution with glitchless switching capability
• Ultra-low supply current of 0.1µA and operation from +2.7V to +5.5V
• Power-on reset (POR) initializes wiper to midscale position

Applications

• Mechanical potentiometer replacement
• Low-drift programmable gain amplifier (PGA)
• Adjustable voltage reference circuits
• Programmable filters and time constant adjustment

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the package type matches the 10-pin µMAX specification and ensure the operating temperature range meets the extended industrial requirements of -40°C to +85°C for your specific application environment.

Selection Notes

Select the MAX5405EUB+T when a 100kΩ end-to-end resistance is required. Compare against MAX5403 (10kΩ) and MAX5404 (50kΩ) based on circuit impedance needs. Ensure the design supports the 3-wire serial interface timing constraints and utilizes the low ratiometric temperature coefficient for stable performance over varying temperatures.

Part Context

This part belongs to the MAX5403/MAX5404/MAX5405 family of dual linear taper digital potentiometers. While sharing identical pinouts and control interfaces, the family members differ in nominal resistance values: 10kΩ, 50kΩ, and 100kΩ respectively. All variants share the same 10-pin µMAX package and electrical characteristics regarding linearity and supply current.

Replacement Considerations

Direct functional replacements within the same family include MAX5403EUB+T and MAX5404EUB+T, provided the resistance value difference is acceptable for the circuit design. Verify compatibility with existing PCB footprints as all variants use the 10-pin µMAX package.