MAX5404EUB+T

Overview

The MAX5404EUB+T is a dual digital potentiometer IC featuring one 3-terminal potentiometer and one 2-terminal variable resistor. It operates on a single supply voltage ranging from +2.7V to +5.5V with an ultra-low supply current of 0.1µA. The device provides 256-tap resolution controlled via a 3-wire SPI-compatible serial interface. Key electrical characteristics include a nominal end-to-end temperature coefficient of 35ppm/°C, a ratiometric temperature coefficient of 5ppm/°C, and glitchless switching between taps. A power-on reset (POR) circuit initializes the wiper to the midscale position upon power-up.

Feature Summary

• Dual configuration: One 3-terminal potentiometer and one 2-terminal variable resistor
• 256-tap resolution with 8-bit control via 3-wire SPI interface
• Ultra-low supply current of 0.1µA at VDD = +2.7V
• Glitchless switching and power-on reset to midscale position

Applications

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

Procurement Notes

Verify component authenticity through authorized Analog Devices or Maxim Integrated distributors. Confirm RoHS compliance status (+ suffix indicates lead-free). Ensure the ordering suffix matches the required tape-and-reel packaging format for automated assembly processes.

Selection Notes

Select the MAX5404EUB+T specifically for applications requiring a 50kΩ resistance value. Compare against MAX5403 (10kΩ) and MAX5405 (100kΩ) if different resistance ranges are needed. Verify that the volatile memory architecture meets system requirements, as wiper positions are lost upon power loss.

Part Context

This component belongs to the MAX5403/MAX5404/MAX5405 family of low-drift digital potentiometers. All variants share identical pinouts, interfaces, and package types (10-pin µMAX), differing only in their nominal end-to-end resistance values. The EUB suffix denotes the specific 10-pin µMAX package code.

Replacement Considerations

Direct functional substitutes within the same family include MAX5403EUB+T (10kΩ) and MAX5405EUB+T (100kΩ), provided the resistance tolerance aligns with design needs.