MAX5437EUD+

Overview

The MAX5437EUD+ is a high-voltage, single-channel digital potentiometer featuring 128 tap positions and an integrated uncommitted amplifier. It operates with a separate low-voltage digital supply (VCC: +2.7V to +5.25V) and high-voltage analog supplies (VDD/VSS), requiring a differential voltage between 9V and 31.5V. The device supports ±5V to ±15V dual supplies or single-supply configurations up to +30V/-28V. It utilizes a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface for wiper control and includes power-on reset functionality that sets the wiper to midscale.

Feature Summary

• Integrated uncommitted high-voltage operational amplifier
• 128-tap resolution with glitchless switching
• Low temperature coefficients: 35ppm/°C end-to-end, 5ppm/°C ratiometric
• Flexible analog supply range: VDD - VSS between 9V and 31.5V

Applications

• LCD screen contrast adjustment
• Mechanical potentiometer replacement in high-voltage circuits
• Low-drift programmable gain amplifiers
• Data-acquisition systems requiring digitally adjustable biasing

Procurement Notes

Verify the component matches the specific pinout and electrical characteristics of the MAX5437 variant within the MAX5436–MAX5439 family. Confirm the presence of the internal amplifier and the 14-pin TSSOP package format during inspection. Ensure compatibility with the required analog supply voltage separation before integration.

Selection Notes

Select this component when a single-channel digital potentiometer with an integrated amplifier is required. The MAX5437 differs from the MAX5436 by offering a 14-pin TSSOP package instead of a 10-pin µMAX package and including the on-chip amplifier. Verify that the application requires the specific 50kΩ resistance value associated with this model number.

Part Context

This device belongs to the MAX5436–MAX5439 series of ±15V, 128-tap, low-drift digital potentiometers manufactured by Analog Devices / Maxim Integrated. The series provides mechanical potentiometer replacements with digital control interfaces. The MAX5437 specifically denotes the 50kΩ version housed in a 14-pin TSSOP package with an integrated amplifier.

Replacement Considerations

The MAX5436 serves as a functional alternative but lacks the internal amplifier and uses a 10-pin µMAX package. The MAX5439 offers identical features but with a 100kΩ end-to-end resistance.