MAX5432META+T

Overview

The MAX5432META+T is a nonvolatile, linear-taper digital potentiometer featuring 32 tap positions and a 50kΩ end-to-end resistance. It utilizes an internal EEPROM to recall wiper position at power-up. The device operates on a single +2.7V to +5.25V supply with typical standby current of 0.5µA. Communication occurs via a fast-mode I²C-compatible serial interface supporting data rates up to 400kbps. It is housed in an 8-pin TDFN package with an exposed pad and specified for operation from -40°C to +85°C.

Feature Summary

• Nonvolatile memory retains wiper position across power cycles
• I²C-compatible serial interface with multiple factory-preset addresses
• Low ratiometric temperature coefficient of 5ppm/°C
• Typical static supply current of 500nA

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifiers
• Volume control circuits
• Liquid-crystal display (LCD) screen adjustment

Procurement Notes

Verify the specific I²C address configuration required for the system bus, as the 'M' suffix indicates a factory-programmed address distinct from other variants. Confirm that the 8-pin TDFN footprint matches the PCB layout, noting the requirement for an exposed thermal pad connection to ground. Ensure the design accommodates the 12ms nonvolatile write time when storing settings.

Selection Notes

Select this component when a 50kΩ resistance value is required alongside nonvolatile storage capabilities. The MAX5432 variant provides access to High, Low, and Wiper terminals for voltage-divider configurations, unlike the MAX5434 which connects H internally to W. Verify that the application voltage remains within the 2.7V to 5.25V range to maintain specified linearity and timing parameters.

Part Context

This part belongs to the MAX5432–MAX5435 family of 32-tap digital potentiometers. The MAX5432 specifically offers 50kΩ resistance in an 8-pin TDFN package. The 'M' ordering suffix denotes a unique factory-set I²C slave address, allowing multiple devices to share the same bus without external address pin conflicts. The '+T' suffix indicates lead-free construction and tape-and-reel packaging.

Replacement Considerations

Direct functional replacements within the same package include other MAX5432 variants with different I²C addresses (e.g., MAX5432LETA+). For 100kΩ applications, the MAX5433META+ is the corresponding resistor value alternative. Devices requiring variable resistor topology only may utilize the MAX5434 series in SOT23-6 packages if board space permits.