MAX5497ETE+T

Overview

The MAX5497ETE+T is a dual, nonvolatile, linear-taper digital potentiometer from the MAX5494–MAX5499 family. It provides two independent variable resistors with 10-bit (1024-tap) resolution and a 50kΩ end-to-end resistance. The device features an internal EEPROM that stores wiper positions for initialization upon power-up. Communication is handled via a 3-wire SPI-compatible serial interface supporting data rates up to 7MHz. Operating on 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 space-saving 16-pin TQFN package and is specified over an extended temperature range of -40°C to +85°C.

Feature Summary

• Dual 10-bit (1024-tap) variable resistors with 50kΩ end-to-end resistance
• Nonvolatile memory retains wiper position after power loss
• 3-wire SPI-compatible serial interface with 7MHz clock rate
• Low standby current of 1.5µA maximum

Applications

• Gain and offset adjustment circuits
• LCD contrast adjustment
• Pressure sensor signal conditioning
• Mechanical potentiometer replacement

Procurement Notes

Verify the specific suffix ETE+T corresponds to the 16-pin TQFN-EP package and the + designation indicates lead-free compliance. Confirm the operating temperature range matches the application requirements of -40°C to +85°C. Ensure the serial interface timing parameters align with the host controller's capabilities.

Selection Notes

Select the MAX5497ETE+T when a dual variable resistor configuration is required rather than a voltage divider. The 50kΩ resistance value suits applications requiring higher impedance nodes. Verify that the 10-bit resolution meets the precision needs of the system. Consider the 1.5µA standby current if power efficiency is critical during idle periods.

Part Context

This component belongs to the MAX5494–MAX5499 series of 10-bit digital potentiometers. While the MAX5494/MAX5495 are programmable voltage dividers, the MAX5496/MAX5497 are configured as dual variable resistors. The MAX5498/MAX5499 combine one voltage divider and one variable resistor. All variants share the same pinout and interface protocol.

Replacement Considerations

Direct substitutes within the same family include the MAX5496ETE+T for a 10kΩ variable resistor variant. Other series members like the MAX5494ETE+T offer voltage divider functionality instead. Cross-referencing with other Maxim Integrated digital potentiometer families may require verification of interface compatibility and pin assignments.