MAX5404EUB

Overview

The MAX5404EUB is a dual digital potentiometer IC from Analog Devices/Maxim Integrated, housed in a 10-pin µMAX package. It integrates one 3-terminal potentiometer and one 2-terminal variable resistor, each offering 256 tap positions controlled via a 3-wire SPI 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 features a nominal end-to-end resistance of 50kΩ with a temperature coefficient of 35ppm/°C and a ratiometric coefficient of 5ppm/°C. A power-on reset circuit initializes the wiper to the midscale position upon startup.

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 128)
• Compatible with standard 3-wire SPI serial interface

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 specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for the intended assembly process. Cross-reference the part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select the MAX5404EUB when a 50kΩ resistance value is required for either the potentiometer or variable resistor section. Compare against MAX5403EUB (10kΩ) and MAX5405EUB (100kΩ) if different resistance ranges are needed. Verify that the 3-wire SPI interface aligns with the system's microcontroller capabilities and that the extended industrial temperature range (-40°C to +85°C) suits the operating environment.

Part Context

The MAX5404EUB belongs to the MAX5403/MAX5404/MAX5405 family of dual linear taper digital potentiometers. This family shares identical pinouts, interfaces, and functional characteristics, differing only in the nominal end-to-end resistance values. The EUB designation indicates the 10-pin µMAX package variant within this series.

Replacement Considerations

Direct replacements within the same package and interface include the MAX5403EUB (10kΩ) and MAX5405EUB (100kΩ), provided the resistance value adjustment is acceptable for the circuit design.