MAX5479ETE#TG16

Overview

The MAX5479ETE#TG16 is a dual, nonvolatile, linear-taper digital potentiometer from Analog Devices/Maxim Integrated. It features two independent 100kΩ resistor arrays with 256 tap positions each, controlled via a fast-mode I²C-compatible serial interface. The device includes internal EEPROM for power-on recall of wiper positions and supports single-supply operation from +2.7V to +5.25V. Key electrical characteristics include a maximum static supply current of 1µA, ±1 LSB INL, and ±0.5 LSB DNL in voltage-divider mode. It operates over an extended temperature range of -40°C to +85°C and is housed in a 16-pin Thin QFN package.

Feature Summary

• Dual 100kΩ potentiometers with 256 tap positions per array
• Nonvolatile EEPROM stores wiper position for power-on recall
• I²C-compatible serial interface with up to 400kbps data rate
• EEPROM write protection via WP pin
• Low 1µA (max) static supply current

Applications

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

Procurement Notes

Verify the specific ordering suffix #TG16 against official manufacturer documentation, as standard datasheets list ETE+T for the TQFN-EP package. Confirm RoHS compliance and lead-free status if required by the design specification. Ensure the supplier provides traceability for the Analog Devices/Maxim Integrated brand.

Selection Notes

Select this component when a dual-channel digital potentiometer with 100kΩ end-to-end resistance is required. The MAX5479 variant is chosen over MAX5477 (10kΩ) or MAX5478 (50kΩ) based on the specific resistance value needed. The ETE package indicates a 16-pin Thin QFN form factor suitable for space-constrained PCB layouts.

Part Context

This part belongs to the MAX5477/MAX5478/MAX5479 family of nonvolatile digital potentiometers. While the MAX5477 offers 10kΩ and the MAX5478 offers 50kΩ, the MAX5479 specifically provides 100kΩ nominal resistance. All variants share identical pinouts, interfaces, and nonvolatile memory features, differing only in their resistive element values.

Replacement Considerations

Direct functional replacements within the same family include MAX5477ETE+T and MAX5478ETE+T, provided the resistance value difference is acceptable for the circuit design. Cross-vendor equivalents would require matching I²C interface, nonvolatile memory, and 256-tap resolution specifications.