MAX5497ETE+

Overview

The MAX5497ETE+ is a dual, nonvolatile, linear-taper digital potentiometer featuring 10-bit (1024-tap) resolution. It functions as two independent variable resistors with a nominal end-to-end resistance of 50kΩ and a temperature coefficient of 35ppm/°C. The device utilizes an internal EEPROM to store wiper positions for initialization upon power-up. Communication is handled via a 3-wire SPI-compatible serial interface supporting data rates up to 7MHz. It operates on a single supply voltage ranging from +2.7V to +5.25V or dual supplies of ±2.5V, consuming a maximum standby current of 1.5µA.

Feature Summary

• Dual 50kΩ variable resistors with 10-bit (1024-tap) linear resolution
• Nonvolatile memory retains wiper position for 50 years at +85°C
• 3-wire SPI-compatible serial interface with 7MHz clock rate
• Low standby current of 1.5µA maximum

Applications

• Programmable filters with adjustable gain and cutoff frequency
• Gain and offset voltage adjustment in signal conditioning circuits
• LCD contrast bias control
• Mechanical potentiometer replacement in space-constrained designs

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with the system's serial interface timing requirements, particularly the busy time during nonvolatile writes. Confirm that the 50kΩ end-to-end resistance aligns with the circuit design constraints.

Selection Notes

Select this component when dual variable resistor functionality is required within a single package. The 50kΩ resistance value suits applications requiring higher impedance compared to the 10kΩ variants. Verify that the 10-bit resolution provides sufficient granularity for the intended analog control application. Ensure the operating voltage range matches the system's power supply rails.

Part Context

This part belongs to the MAX5494–MAX5499 family of 10-bit, dual, nonvolatile digital potentiometers. While the MAX5494/MAX5495 function as programmable voltage dividers, the MAX5496/MAX5497 are configured specifically as dual variable resistors. The MAX5498/MAX5499 combine one voltage divider and one variable resistor. All share the same TQFN-16 package and electrical characteristics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.