MAX5436EUB+T

Overview

The MAX5436EUB+T is a single-channel, high-voltage digital potentiometer featuring 128 tap positions and a 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 utilizes a 3-wire SPI-compatible serial interface for wiper control and includes a power-on reset function that sets the wiper to midscale (position 64). Packaged in a 10-pin µMAX format, it supports extended temperature operation from -40°C to +85°C.

Feature Summary

• High-voltage operation with ±5V to ±15V dual-supply or single-supply configurations up to +30V
• 128-tap resolution with 50kΩ end-to-end resistance and low drift (35ppm/°C)
• 3-wire SPI/QSPI/MICROWIRE-compatible serial interface
• Power-on reset defaults wiper to midscale position

Applications

• LCD screen contrast adjustment
• Mechanical potentiometer replacement
• Low-drift programmable gain amplifier
• Audio volume control

Procurement Notes

Verify component authenticity through authorized distributors as counterfeits exist. Confirm package integrity upon receipt, as the µMAX housing is sensitive to mechanical stress. Ensure ordering suffix matches the specific resistance value required, as variants exist within the MAX5436 family.

Selection Notes

Select this model for applications requiring high-voltage analog signal processing controlled by low-voltage logic. The 50kΩ resistance is suitable for moderate current loads. For designs requiring an integrated operational amplifier, consider the MAX5437 variant instead. Verify that the system's analog supply differential remains within the 9V to 31.5V operational window.

Part Context

This component belongs to the MAX5436–MAX5439 series of high-voltage digital potentiometers manufactured by Analog Devices (Maxim Integrated). The EUB+ designation indicates the 50kΩ version housed in a 10-pin µMAX package with lead-free construction. It serves as a direct electronic replacement for mechanical potentiometers in precision analog circuits.

Replacement Considerations

Public confirmed substitute part numbers: MAX5438EUB+ (100kΩ variant), MAX5437EUD+ (integrated amplifier variant).