MAX5494ETE+T

Overview

The MAX5494ETE+T is a dual, nonvolatile, linear-taper digital potentiometer featuring 10-bit (1024-tap) resolution. It operates with a single supply voltage ranging from +2.7V to +5.25V or dual supplies of ±2.5V. The device provides two independent programmable voltage dividers with an end-to-end resistance of 10kΩ and a temperature coefficient of 35ppm/°C. It utilizes a 3-wire SPI-compatible serial interface for data transfer at speeds up to 7MHz. Standby current is typically 1.5µA maximum, while programming current reaches 400µA. The unit is housed in a 16-pin TQFN package.

Feature Summary

• Dual 10-bit nonvolatile linear-taper digital potentiometers
• 1024 tap positions with 10kΩ end-to-end resistance
• 3-wire SPI-compatible serial interface supporting 7MHz clock
• EEPROM retains wiper position for 50 years with 50,000 store cycles

Applications

• Gain and offset adjustment in signal conditioning circuits
• LCD contrast bias control
• Low-drift programmable-gain amplifiers
• Pressure sensor signal conditioning

Procurement Notes

Verify the component authenticity by checking the marking on the 16-pin TQFN-EP package against official Analog Devices documentation. Confirm the presence of the exposed pad connection for thermal management. Ensure the ordering suffix matches the specific tape-and-reel packaging requirements for automated assembly processes.

Selection Notes

Select this model when dual independent voltage divider functionality is required with nonvolatile memory retention. The 10kΩ resistance value suits applications requiring lower power consumption compared to the 50kΩ variant. Verify that the system interface supports the 3-wire SPI protocol and that the operating voltage range aligns with the +2.7V to +5.25V specification.

Part Context

This component belongs to the MAX5494–MAX5499 family of 10-bit digital potentiometers. While other variants in the series offer different resistance values or variable resistor configurations, the MAX5494 specifically provides dual 3-terminal programmable voltage dividers. It replaces mechanical potentiometers in space-constrained designs requiring digital control.

Replacement Considerations

Direct functional substitutes within the same family include the MAX5495ETE+T, which offers identical pinout and features but with a 50kΩ end-to-end resistance instead of 10kΩ. Designers must verify that the increased resistance does not impact the bandwidth or loading requirements of the target application.