MAX5437EUD+T

Overview

The MAX5437EUD+T is a single-channel, 128-tap digital potentiometer with 50kΩ end-to-end resistance. It operates with a separate digital supply (VCC) of +2.7V to +5.25V and analog supplies (VDD/VSS) ranging from ±5V to ±15V, requiring a differential voltage between 9V and 31.5V. The device features a 3-wire SPI-compatible serial interface, volatile memory, and an integrated high-voltage uncommitted operational amplifier. Key electrical parameters include a 35ppm/°C end-to-end temperature coefficient, ±1 LSB INL/DNL, and a typical wiper resistance of 0.9kΩ.

Feature Summary

• Integrated high-voltage uncommitted amplifier for board space reduction
• Glitchless switching between resistor taps
• Power-on reset initializes the wiper to midscale (position 64)
• Low drift characteristics with 35ppm/°C end-to-end and 5ppm/°C ratiometric temperature coefficients

Applications

• LCD screen contrast adjustment
• Data-acquisition systems
• Mechanical potentiometer replacement
• Low-drift programmable gain amplifiers
• Audio volume control

Procurement Notes

Verify the component matches the specific 50kΩ resistance variant within the MAX5437 family. Confirm that the application supports the required analog supply separation range of 9V to 31.5V. Ensure the design accommodates the separate digital logic supply voltage requirements distinct from the analog rails.

Selection Notes

Select this model over the MAX5436 or MAX5438 if the 14-pin TSSOP package is preferred over the 10-pin µMAX form factor. Choose this part specifically when an on-chip high-voltage amplifier is needed for signal conditioning, as other variants in the series lack this feature.

Part Context

This component belongs to the MAX5436–MAX5439 family of high-voltage digital potentiometers. It shares core specifications such as resolution and interface type with siblings like the MAX5436, MAX5438, and MAX5439, but is distinguished by its specific resistance value and package configuration.

Replacement Considerations

The MAX5436EUB+T serves as a functional substitute with identical electrical performance but utilizes a 10-pin µMAX package instead of the 14-pin TSSOP.