MAX5488ETE+T

Overview

The MAX5488ETE+T is a dual, linear-taper digital potentiometer featuring a 3-wire SPI-compatible interface. It provides two independent resistor arrays with an end-to-end resistance of 50kΩ and 256 tap positions. The device includes nonvolatile EEPROM memory to retain wiper settings across power cycles. Operating on a single supply from +2.7V to +5.25V, it offers ±1 LSB INL and ±0.5 LSB DNL in voltage-divider mode. The component operates within an extended temperature range of -40°C to +85°C and is housed in a 16-pin TQFN package.

Feature Summary

• Dual-channel architecture with 50kΩ end-to-end resistance per channel
• Nonvolatile EEPROM storage for wiper position recall upon power-up
• SPI-compatible serial interface requiring only three control lines
• Low temperature coefficient of 35ppm/°C for end-to-end resistance

Applications

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

Procurement Notes

Verify the specific suffix ETE+T corresponds to the 16-pin TQFN-EP package and lead-free compliance. Confirm the 50kΩ resistance value matches system requirements, as other variants like MAX5487 (10kΩ) or MAX5489 (100kΩ) share the same pinout but differ electrically. Ensure the design supports the required 200,000 store cycle endurance for the nonvolatile memory.

Selection Notes

Select this model specifically for its 50kΩ resistance value; the MAX5487 offers 10kΩ and the MAX5489 offers 100kΩ. The TQFN package requires thermal management considerations due to the exposed pad connection. Verify that the application current does not exceed the continuous limits specified for the 50kΩ configuration, which are lower than those for the 10kΩ variant.

Part Context

This component belongs to the MAX5487/MAX5488/MAX5489 family of dual digital potentiometers. While functionally identical regarding interface and memory, the family members are distinguished by their end-to-end resistance values: 10kΩ, 50kΩ, and 100kΩ respectively. All variants support the same 256-tap resolution and nonvolatile features.

Replacement Considerations

Direct substitutes include MAX5487ETE+T (10kΩ) and MAX5489ETE+T (100kΩ) if resistance scaling is acceptable. The MAX5488EUD+T serves as a package alternative using the 14-pin TSSOP form factor.