MAX5436EUB+

Overview

The MAX5436EUB+ is a single-channel, 128-tap digital potentiometer housed in a 10-pin µMAX package. It operates with a separate digital supply (VCC) of +2.7V to +5.25V and analog supplies (VDD/VSS) spanning ±5V to ±15V, requiring a differential voltage between 9V and 31.5V. The device features a 50kΩ end-to-end resistance with a 35ppm/°C temperature coefficient. Control is managed via a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. Key electrical parameters include ±1 LSB INL/DNL, a wiper settling time of 5µs, and a power-on reset to midscale.

Feature Summary

• 128-tap resolution with 50kΩ end-to-end resistance
• High-voltage operation: ±5V to ±15V dual supply or +10V to +30V single supply
• Low-drift characteristics: 35ppm/°C end-to-end and 5ppm/°C ratiometric temperature coefficients
• Glitchless switching between resistor taps

Applications

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

Procurement Notes

Verify the component matches the specific 50kΩ resistance value associated with the MAX5436 suffix. Confirm the 10-pin µMAX package format aligns with board layout requirements. Ensure the design supports the required analog supply separation of 9V to 31.5V and the separate digital logic supply range of 2.7V to 5.25V for proper functionality.

Selection Notes

Select this model when a 50kΩ resistance value is required; the MAX5438 variant offers 100kΩ. Choose the MAX5436 over the MAX5437 if an uncommitted high-voltage amplifier is not needed, as the latter uses a 14-pin TSSOP package. Verify that the application can accommodate the separate digital and analog supply rails necessary for high-voltage operation.

Part Context

This component belongs to the MAX5436–MAX5439 family of high-voltage digital potentiometers. The MAX5436 specifically denotes the 50kΩ version in the 10-pin µMAX package without an integrated amplifier. Other family members include the MAX5438 (100kΩ, µMAX), MAX5437 (50kΩ, TSSOP with amp), and MAX5439 (100kΩ, TSSOP with amp).

Replacement Considerations

Direct functional substitutes within the same package and resistance include the MAX5436EUB (non-lead-free version). For different resistance values, consider the MAX5438EUB+. If an integrated amplifier is acceptable, the MAX5437EUD provides similar performance in a 14-pin TSSOP package.