MAX5403EUB+T

Overview

The MAX5403EUB+T is a dual digital potentiometer from Analog Devices/Maxim Integrated, 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 via a 3-wire SPI-compatible interface. Key electrical characteristics include a nominal end-to-end temperature coefficient of 35ppm/°C and a ratiometric coefficient of 5ppm/°C. It includes glitchless switching and a power-on reset that sets the wiper to midscale.

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 authenticity through authorized distributors or direct manufacturer channels. Confirm the package type is 10-pin µMAX and the resistance value is 10kΩ for the MAX5403 variant. Ensure the operating environment stays within the specified -40°C to +85°C industrial temperature range.

Selection Notes

Select the MAX5403EUB+T when a 10kΩ end-to-end resistance is required. Choose this part over the MAX5404 (50kΩ) or MAX5405 (100kΩ) if lower resistance values are needed for specific impedance matching or current handling. Verify that the application supports the 3-wire serial interface timing requirements.

Part Context

This component belongs to the MAX5403/MAX5404/MAX5405 family of dual digital potentiometers. The 'E' suffix indicates the extended industrial temperature range (-40°C to +85°C). The '+T' suffix typically denotes tape-and-reel packaging, while the base model MAX5403EUB specifies the 10-pin µMAX package.

Replacement Considerations

Direct replacements within the same family include MAX5404EUB+T (50kΩ) and MAX5405EUB+T (100kΩ), provided the resistance value difference is acceptable for the circuit design. Other digital potentiometers with similar pinouts and interfaces may require schematic verification.