MAX5454EUB+T

Overview

The MAX5454EUB+T is a dual digital potentiometer from the MAX5450–MAX5455 family, functioning as two independent 2-terminal variable resistors. It features 256 digitally controlled wiper taps and operates on a single +2.7V to +5.5V supply with an ultra-low current consumption of 0.1µA. The device utilizes an up/down interface for glitchless switching between resistor taps. Key electrical characteristics include a 35ppm/°C end-to-end temperature coefficient and a ratiometric temperature coefficient of 5ppm/°C. A power-on reset circuit sets the wiper to midscale (position 127) upon initialization.

Feature Summary

• Dual 2-terminal variable resistor configuration with 256 tap positions
• Ultra-low supply current of 0.1µA at VDD = 2.7V
• Glitchless switching via Up/Down interface
• Low temperature coefficients: 35ppm/°C end-to-end and 5ppm/°C ratiometric

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifiers
• Adjustable voltage references
• Impedance matching circuits

Procurement Notes

Verify the component is the MAX5454 variant specifically, which provides 100kΩ resistance values in a 10-pin µMAX package. Confirm the suffix '+T' indicates tape-and-reel packaging. Check that the manufacturer is Analog Devices or Maxim Integrated. Ensure the operating temperature range meets requirements for -40°C to +85°C.

Selection Notes

Select the MAX5454 when a 100kΩ resistance value is required. Choose this part over the MAX5451/MAX5453/MAX5455 if a 2-terminal variable resistor configuration is needed rather than a 3-terminal potentiometer. The 10-pin µMAX package is suitable for space-constrained designs compared to the 14-pin TSSOP options.

Part Context

The MAX5454 belongs to the MAX5450–MAX5455 family of dual digital potentiometers. It shares the same core architecture and interface as other members but differs in resistance value and terminal configuration. Specifically, it offers 100kΩ resistance in a compact 10-pin µMAX package, distinguishing it from the 10kΩ and 50kΩ variants within the same series.

Replacement Considerations

Direct replacements within the same family include MAX5450 (10kΩ) and MAX5452 (50kΩ) if different resistance values are acceptable. For 3-terminal potentiometer applications, consider MAX5451 (10kΩ), MAX5453 (50kΩ), or MAX5455 (100kΩ). Cross-package substitution requires verifying pin compatibility between µMAX and TSSOP footprints.