MAX5489ETE+

Overview

The MAX5489ETE+ is a dual, linear-taper digital potentiometer featuring a 3-wire SPI-compatible interface and nonvolatile EEPROM memory. It provides two independent potentiometers with an end-to-end resistance of 100kΩ and 256 tap positions. Operating from a single +2.7V to +5.25V supply, it maintains wiper positions across power cycles. The device operates within the -40°C to +85°C temperature range and is housed in a 16-pin TQFN package.

Feature Summary

• Dual 100kΩ potentiometers with 256 tap positions
• Nonvolatile EEPROM retains wiper position upon power-up
• SPI-compatible serial interface for control
• Low standby current of 0.5µA (typical)

Applications

• LCD screen adjustment
• Audio volume control
• Mechanical potentiometer replacement
• Low-drift programmable filters
• Low-drift programmable-gain amplifiers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for automotive-grade variants if required by specific application standards. Ensure proper handling procedures are followed during assembly.

Selection Notes

Select this model when a high-resistance value of 100kΩ is required compared to the 10kΩ or 50kΩ alternatives. Verify that the 16-pin TQFN footprint fits the PCB layout constraints. Ensure the system voltage remains within the 2.7V to 5.25V operating range.

Part Context

This component belongs to the MAX5487/MAX5488/MAX5489 family of dual digital potentiometers. While sharing identical pinouts and interfaces, the MAX5489 is distinguished by its 100kΩ end-to-end resistance, whereas the MAX5487 offers 10kΩ and the MAX5488 provides 50kΩ.

Replacement Considerations

The MAX5489EUD+ serves as a direct functional substitute using a 14-pin TSSOP package instead of the TQFN form factor. Other family members like the MAX5488 offer lower resistance values but share the same interface and memory features.

FAQ

How does the device handle wiper position data after power loss?

The internal EEPROM stores the wiper position prior to power-down. Upon power-up, the device automatically recalls and restores the wipers to their previously stored positions.

What is the maximum clock frequency for the serial interface?

The SCLK frequency can reach up to 5 MHz according to the timing characteristics specifications.

What is the typical standby current consumption?

When not being programmed and digital inputs are at VDD or GND, the standby current drops to a typical value of 0.5 µA.