MAX5488ETE+

Overview

The MAX5488ETE+ is a dual, linear-taper digital potentiometer featuring a 3-wire SPI-compatible interface. It provides 256 tap positions with an end-to-end resistance of 50kΩ and a temperature coefficient of 35ppm/°C. The device operates on a single +2.7V to +5.25V supply and includes nonvolatile EEPROM memory to retain wiper settings across power cycles. Packaged in a 16-pin TQFN-EP (3mm x 3mm x 0.8mm), it supports extended operating temperatures from -40°C to +85°C.

Feature Summary

• Dual-channel architecture with 256 programmable tap positions
• Nonvolatile EEPROM storage for wiper position recall upon power-up
• SPI-compatible serial interface requiring only three control lines
• Low standby current of 0.5µA typical

Applications

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

Procurement Notes

Verify the package type matches the design footprint; this specific part number corresponds to the 16-pin TQFN-EP variant. Confirm that the 50kΩ resistance value aligns with the circuit requirements, as other variants exist with different resistance values. Ensure the PCB layout accommodates the exposed pad thermal connection if required by the application.

Selection Notes

Select the MAX5488ETE+ when a 50kΩ end-to-end resistance is required. For 10kΩ applications, use the MAX5487ETE+. For 100kΩ applications, use the MAX5489ETE+. All variants share identical pinouts and functionality but differ in resistance tolerance and maximum continuous current ratings.

Part Context

This component belongs to the MAX5487/MAX5488/MAX5489 family of dual, nonvolatile digital potentiometers. The family shares a common SPI interface and package options, differentiated primarily by their end-to-end resistance values: 10kΩ, 50kΩ, and 100kΩ respectively.

Replacement Considerations

Direct functional replacements within the same package include the MAX5487ETE+ (10kΩ) and MAX5489ETE+ (100kΩ). Verify that the system can tolerate the differences in end-to-end resistance and wiper current limits associated with these alternative values.