MAX5487EUD+

Overview

The MAX5487EUD+ is a dual, linear-taper digital potentiometer featuring a 3-wire SPI-compatible interface and nonvolatile memory. It provides two independent 10kΩ resistor arrays with 256 tap positions each. The device operates on a single +2.7V to +5.25V supply, drawing 1µA in standby mode. Key electrical characteristics include ±1 LSB INL, ±0.5 LSB DNL, and a 35ppm/°C end-to-end temperature coefficient. It is housed in a 14-pin TSSOP package and guaranteed for operation from -40°C to +85°C.

Feature Summary

• Dual 10kΩ resistive arrays with 256 programmable tap positions
• Nonvolatile EEPROM retains wiper position upon power-up or via command
• SPI-compatible serial interface (SCLK, DIN, CS) for control
• Low standby current of 1µA typical

Applications

• LCD screen contrast and bias adjustment
• Audio volume control circuits
• Mechanical potentiometer replacement
• Programmable low-drift filters
• Programmable-gain amplifiers

Procurement Notes

Verify the 'EUD+' suffix confirms the 14-pin TSSOP package and lead-free/RoHS compliance. Confirm the specific resistance value matches the design requirement, as the MAX5487 family includes 50kΩ and 100kΩ variants. Check for availability constraints as distribution status may vary.

Selection Notes

Select this component when a dual-channel digital potentiometer with persistent settings is required. Ensure the system voltage falls within the 2.7V to 5.25V range. Verify that the 10kΩ end-to-end resistance aligns with the target impedance needs, distinguishing it from the MAX5488 (50kΩ) and MAX5489 (100kΩ).

Part Context

This part belongs to the MAX5487/MAX5488/MAX5489 family of dual, nonvolatile, SPI-interface digital potentiometers. While the MAX5487 specifies 10kΩ resistance, the family shares identical pinouts, interfaces, and features, differing only in the end-to-end resistance values of the internal resistor arrays.

Replacement Considerations

Direct functional replacements within the same family include MAX5488EUD+ (50kΩ) and MAX5489EUD+ (100kΩ), provided the resistance tolerance allows for the change. Other packages like MAX5487ETE+ offer the same function in a TQFN-EP format.