MAX5408EEE+

Overview

The MAX5408EEE+ is a dual, logarithmic taper digital potentiometer from Analog Devices/Maxim Integrated. It features two independent potentiometers with 32 tap positions each and a fixed end-to-end resistance of 10kΩ. Designed for audio applications, it operates on a single supply voltage ranging from +2.7V to +3.6V. The device utilizes an SPI-compatible serial interface for control and includes zero-crossing detection to minimize audible switching noise. It is housed in a 16-pin QSOP package and specified over the extended temperature range of -40°C to +85°C.

Feature Summary

• Dual logarithmic taper digital potentiometers with 32 taps per wiper
• Fixed 10kΩ end-to-end resistance with ±30% tolerance
• Zero-crossing detection feature for clickless switching
• SPI-compatible 3-wire serial interface

Applications

• Stereo volume control
• Fading and balancing stereo signals
• Mechanical potentiometer replacement in audio circuits

Procurement Notes

Verify the component matches the specific MAX5408 variant with one wiper per resistor, as opposed to the MAX5409 which has two wipers. Confirm the EEE suffix indicates the 16-pin QSOP package. Ensure the logic supply voltage (VLOGIC) aligns with system requirements, as it can operate independently within the 2.7V to 5.5V range while VDD remains between 2.7V and 3.6V.

Selection Notes

Select this component when replacing mechanical pots in audio paths requiring logarithmic response. The MAX5408 is suitable for systems needing low standby current (0.5µA typical). Consider the MAX5409 if dual wipers per potentiometer are required for complex fading applications. Ensure the design accommodates the volatile memory nature, where wiper positions reset to maximum attenuation upon power-up.

Part Context

The MAX5408EEE+ belongs to the MAX5408–MAX5411 family of dual audio digital potentiometers. This family shares core specifications such as 10kΩ resistance and 32-tap resolution but differs in wiper configuration and supply voltage ranges. The MAX5408 specifically targets lower voltage applications (+2.7V to +3.6V) compared to the MAX5410 (+4.5V to +5.5V), while maintaining identical pinouts and functionality for single-wiper designs.

Replacement Considerations

Public confirmed substitute part numbers: None identified.