MAX5433LETA

Overview

The MAX5433LETA+ is a single-channel, nonvolatile digital potentiometer manufactured by Analog Devices (Maxim Integrated). It features 32 tap positions with a linear resistance taper and operates within a supply voltage range of 2.7 V to 5.25 V. The device utilizes an I²C-compatible serial interface for communication and is housed in an 8-pin TDFN package. Key electrical specifications include a maximum resistance of 100 kΩ, a temperature coefficient of 35 ppm/°C, and a tolerance of ±25%. It supports power-down modes with low standby current and retains wiper settings upon power cycle.

Feature Summary

• Nonvolatile memory retains wiper position after power loss
• I²C compatible serial interface (2-wire)
• Linear taper with 32 discrete tap positions
• Single channel with 100 kΩ nominal resistance
• TDFN-8 EP surface-mount package

Applications

• Programmable gain amplifiers
• Voltage reference adjustment
• Sensor biasing and calibration
• Audio volume control circuits

Procurement Notes

Verify the complete part number including suffixes such as '+' for lead-free compliance and 'T' for tape-and-reel packaging if applicable. Confirm the specific resistance value variant (e.g., 10k, 50k, 100k) as the base model may denote a family. Check RoHS status and ensure the supplier provides valid traceability documentation for industrial components.

Selection Notes

Select based on required resistance value and tolerance. Ensure the operating voltage matches the system's 2.7V to 5.25V range. Verify that the I²C address configuration meets system bus requirements. Consider the thermal performance of the TDFN package for high-power dissipation scenarios, although typical usage involves low current.

Part Context

This component belongs to the MAX543x series of nonvolatile digital potentiometers. It serves as a solid-state replacement for mechanical potentiometers in applications requiring programmable resistance without moving parts. The series offers various resistance values and package options to suit different space and precision constraints.

Replacement Considerations

Direct replacements must match the 32-tap nonvolatile architecture and I²C interface. Compare pinouts carefully between TDFN-8 variants from Maxim and other manufacturers. Verify that substitute devices support the same voltage range and retain data under similar power conditions.