MAX5479ETE#G16

Overview

The MAX5479ETE#G16 is a dual, nonvolatile, linear-taper digital potentiometer featuring an I2C-compatible serial interface. It provides two independent potentiometers, each with 256 tap positions and a nominal end-to-end resistance of 100kΩ. The device operates on a single supply voltage ranging from +2.7V to +5.25V and includes internal EEPROM for power-on recall of wiper positions. Key electrical characteristics include a 70ppm/°C end-to-end resistance temperature coefficient, ±1 LSB integral nonlinearity in voltage-divider mode, and a maximum static supply current of 1µA. It supports data rates up to 400kbps and offers write protection capabilities.

Feature Summary

• Dual 100kΩ potentiometers with 256 tap positions per channel
• Nonvolatile EEPROM stores wiper position for power-on recall
• I2C-compatible serial interface supporting 400kbps clock frequency
• Single-supply operation from +2.7V to +5.25V with 1µA max static current

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifiers
• Volume control circuits
• Liquid-crystal display (LCD) contrast control

Procurement Notes

Verify the ordering suffix #G16 against official manufacturer documentation to confirm specific packaging or compliance details. Ensure the selected package type matches the design requirements, as the MAX5479 series is available in both 16-pin TQFN and 14-pin TSSOP configurations. Confirm lead-free/RoHS compliance status if required by assembly specifications.

Selection Notes

Select the MAX5479 variant specifically when a 100kΩ end-to-end resistance is required, distinguishing it from the 10kΩ (MAX5477) and 50kΩ (MAX5478) options. Consider the 16-pin TQFN package for compact board space requirements, noting the exposed paddle for thermal management. Evaluate the 70ppm/°C temperature coefficient against application drift tolerances.

Part Context

This component belongs to the MAX5477/MAX5478/MAX5479 family of dual, nonvolatile, I2C-interface digital potentiometers manufactured by Analog Devices Inc./Maxim Integrated. The family shares identical functional architectures and pinouts, differing primarily in nominal resistance values and package options. The ETE suffix indicates the 16-pin Thin Quad Flatpack (TQFN) package configuration.

Replacement Considerations

Direct substitutes within the same family include MAX5477ETE and MAX5478ETE, provided the resistance value difference (10kΩ or 50kΩ vs. 100kΩ) is acceptable for the circuit design. Verify that any replacement maintains the 16-pin TQFN footprint and I2C interface compatibility.