MAX5499ETE+T

Overview

The MAX5499ETE+T is a dual, nonvolatile, linear-taper digital potentiometer featuring 10-bit (1024-tap) resolution. It integrates one 2-terminal variable resistor and one 3-terminal programmable voltage-divider with a nominal end-to-end resistance of 50kΩ. The device utilizes an internal EEPROM to store wiper positions for initialization upon power-up. Communication occurs via a 3-wire SPI-compatible serial interface supporting data rates up to 7MHz. Operating from a single supply of +2.7V to +5.25V or dual supplies of ±2.5V, it draws a maximum standby current of 1.5µA. The component is housed in a 16-pin TQFN package and specified over the -40°C to +85°C temperature range.

Feature Summary

• Dual configuration comprising one 2-terminal variable resistor and one 3-terminal programmable voltage-divider
• Nonvolatile memory retains wiper position for 50 years at +85°C with 50,000 write cycles guaranteed
• Low standby supply current of 1.5µA maximum
• Ratiometric temperature coefficient of 5ppm/°C for stable voltage division

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 specific suffix ETE+T against the manufacturer's ordering guide to confirm the 16-pin TQFN-EP package and extended temperature range (-40°C to +85°C). Ensure compatibility with the required 50kΩ resistance value and the mixed terminal configuration (one variable resistor, one voltage divider) before procurement.

Selection Notes

Select this model when a combination of a variable resistor and a voltage divider is required in a single package. The 50kΩ end-to-end resistance distinguishes it from the 10kΩ variants. Verify that the application does not require significant current flow through the voltage-divider wiper, as this creates nonlinear voltage drops; the wiper should connect to high-impedance nodes.

Part Context

This component belongs to the MAX5494–MAX5499 family of 10-bit digital potentiometers. While sharing the same interface and memory architecture, the MAX5499 is distinct because it combines a 2-terminal variable resistor with a 3-terminal voltage divider, whereas other family members offer either two voltage dividers or two variable resistors.

Replacement Considerations

Direct pin-compatible replacements within the same series include the MAX5498, which offers the same mixed terminal configuration but with a 10kΩ end-to-end resistance instead of 50kΩ.