MAX5424ETA+

Overview

The MAX5424ETA+ is a single-channel, nonvolatile digital potentiometer with a nominal end-to-end resistance of 200kΩ. It features 256 tap positions and operates on a single supply voltage ranging from +2.7V to +5.25V. The device utilizes a 3-wire SPI-compatible serial interface for communication at data rates up to 5MHz. Key electrical characteristics include a ±25% end-to-end resistance tolerance, a 35ppm/°C temperature coefficient, and a typical standby supply current of 0.5µA. It is housed in an 8-pin TDFN package measuring 3mm x 3mm.

Feature Summary

• Nonvolatile EEPROM memory stores wiper position for recall upon power-up or interface command.
• SPI-compatible 3-wire serial interface supports clock frequencies up to 5MHz.
• Linear taper with 256 discrete tap points and ±0.5 LSB INL/DNL in voltage-divider mode.
• Low-power operation with 0.5µA typical standby current and 200nA typical static supply current.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm pinout compatibility and package variations. Confirm that the component meets RoHS compliance requirements for the intended assembly process. Ensure the source provides valid traceability for the nonvolatile memory endurance specifications.

Selection Notes

Select the MAX5424ETA+ when a 200kΩ nominal resistance is required. Compare against MAX5422 (50kΩ) and MAX5423 (100kΩ) if different resistance values are needed. Verify that the 256-tap resolution and linear taper meet the application's precision requirements. Check that the operating voltage range aligns with the system's power supply rails.

Part Context

This component belongs to the MAX542x family of 256-tap, nonvolatile digital potentiometers manufactured by Analog Devices / Maxim Integrated. The family includes the MAX5422 and MAX5423, which share identical functionality but differ in nominal resistance values of 50kΩ and 100kΩ, respectively. All variants utilize the same 8-pin TDFN package and SPI interface.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet. Cross-referencing requires verifying pin compatibility, resistance values, and interface protocols with other digital potentiometer ICs.

FAQ

How does the device handle wiper position initialization?

Upon power-up, the internal nonvolatile EEPROM automatically loads the stored wiper position into the volatile wiper register, initializing the device to the last saved state within approximately 10µs.

What is the maximum serial clock frequency?

The 3-wire SPI-compatible serial interface supports clock frequencies up to 5MHz.

What is the guaranteed data retention period for the nonvolatile memory?

The nonvolatile memory is guaranteed to retain wiper data for 50 years at an ambient temperature of +85°C.