MAX5489ETE+T

Overview

The MAX5489ETE+T is a dual, linear-taper digital potentiometer featuring a 3-wire SPI-compatible interface and nonvolatile EEPROM memory. It provides two independent resistor arrays with an end-to-end resistance of 100kΩ and 256 tap positions. The device operates on a single +2.7V to +5.25V supply, drawing 400µA during write cycles and 1µA in standby. Key electrical parameters include ±1 LSB INL, ±0.5 LSB DNL, and a 35ppm/°C temperature coefficient. It is housed in a 16-pin TQFN package and supports -40°C to +85°C operation.

Feature Summary

• Dual 100kΩ resistive arrays with 256 programmable tap positions
• Nonvolatile EEPROM retains wiper settings across power cycles
• SPI-compatible serial interface for direct control
• Low standby current of 1µA typical

Applications

• LCD screen adjustment and bias control
• Audio volume control circuits
• Programmable gain amplifiers
• Low-drift programmable filters

Procurement Notes

Verify the specific suffix 'ETE+T' against the manufacturer's ordering guide to confirm the 16-pin TQFN-EP package and tape-and-reel quantity. Ensure the component meets RoHS compliance requirements as indicated by the '+' designation. Cross-reference the datasheet revision history for any updates to absolute maximum ratings or pin configurations before finalizing procurement.

Selection Notes

Select this model over MAX5487 (10kΩ) or MAX5488 (50kΩ) when a higher 100kΩ end-to-end resistance is required. Consider the 16-pin TQFN package for compact designs, noting the exposed pad connection to GND. Verify that the system voltage remains within the 2.7V to 5.25V range and that the SPI interface timing aligns with the controller's capabilities.

Part Context

This component belongs to the MAX5487/MAX5488/MAX5489 family of dual digital potentiometers. While sharing identical interfaces and memory features, the MAX5489 is distinguished by its 100kΩ resistance value compared to the 10kΩ and 50kΩ variants. All models utilize BiCMOS process technology and offer similar reliability metrics regarding data retention and store cycles.

Replacement Considerations

Direct functional replacements within the same family include MAX5487ETE+T (10kΩ) and MAX5488ETE+T (50kΩ), provided the resistance difference is acceptable for the circuit design. Alternative packages such as the 14-pin TSSOP (MAX5489EUD+) are available but require footprint modification.