MAX5405EUB+

Overview

The MAX5405EUB+ is a dual digital potentiometer featuring one 3-terminal potentiometer and one 2-terminal variable resistor. It operates on a single +2.7V to +5.5V supply with an ultra-low current of 0.1µA. The device provides 256-tap resolution controlled via a 3-wire SPI-compatible interface. Key electrical characteristics include a nominal end-to-end temperature coefficient of 35ppm/°C, a ratiometric coefficient of 5ppm/°C, and a power-on reset that sets the wiper to midscale. It utilizes glitchless switching between taps.

Feature Summary

• Dual configuration: one 3-terminal potentiometer and one 2-terminal variable resistor
• 256-tap positions with 8-bit resolution
• Ultra-low supply current of 0.1µA at +2.7V
• Glitchless switching between resistor taps
• Power-on reset (POR) sets wiper to midscale position

Applications

• Mechanical potentiometer replacement
• Low-drift programmable gain amplifier (PGA)
• Volume control
• LCD screen adjustment
• Adjustable voltage reference

Procurement Notes

Verify the component matches the specific 100kΩ resistance value designated for the MAX5405 variant within the family. Confirm the package type is the 10-pin µMAX format. Ensure the ordering suffix corresponds to the standard tube packaging unless tape-and-reel variants are explicitly required by the design specifications.

Selection Notes

Select this model when a 100kΩ end-to-end resistance is required. The MAX5403 offers 10kΩ and the MAX5404 offers 50kΩ; choose based on circuit impedance needs. Verify compatibility with the 3-wire serial interface timing requirements, specifically the maximum SCLK frequency of 10MHz and setup/hold times.

Part Context

This component belongs to the MAX5403/MAX5404/MAX5405 family of dual linear taper digital potentiometers. All members share identical pinouts, interfaces, and features, differing only in their nominal end-to-end resistance values. The MAX5405 specifically denotes the 100kΩ version of this low-drift series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.