MAX5408ETE+T

Overview

The MAX5408ETE+T is a dual, logarithmic taper digital potentiometer featuring 32-tap positions per wiper. It operates on a single +2.7V to +3.6V supply with an active current of 100µA and standby current of 0.5µA. The device includes a 3-wire SPI-compatible interface, zero-crossing detection for clickless switching, and a mute function providing -90dB attenuation. It has a fixed 10kΩ resistance with 35ppm/°C temperature coefficient and operates from -40°C to +85°C in a 16-pin Thin QFN package.

Feature Summary

• Dual log taper potentiometers with 32 taps and 2dB step resolution
• Zero-crossing detection minimizes audible noise during transitions
• Mute function achieves -90dB attenuation
• Low power consumption: 100µA active, 0.5µA standby
• SPI-compatible serial interface with readback capability

Applications

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

Procurement Notes

Verify the component is the MAX5408 variant (single wiper per resistor) rather than the MAX5409 (dual wiper). Confirm the suffix 'E' indicates the Thin QFN package and '+T' denotes tape-and-reel packaging. Ensure the operating voltage range matches the +2.7V to +3.6V specification.

Selection Notes

Select this part for applications requiring precise logarithmic audio attenuation. Verify that the single-supply voltage range (+2.7V to +3.6V) aligns with the system design. Consider the zero-crossing feature if minimizing switching noise is critical. Compare against MAX5410/MAX5411 if a higher voltage operation up to 5.5V is required.

Part Context

This component belongs to the MAX5408–MAX5411 family of dual, audio, log taper digital potentiometers. The MAX5408 specifically features one wiper per potentiometer, whereas the MAX5409 offers two wipers. All variants share similar electrical characteristics but differ in pinout configuration and supply voltage requirements.

Replacement Considerations

The MAX5410ETE+T serves as a direct functional substitute if the application requires operation at +4.5V to +5.5V instead of +2.7V to +3.6V. Both parts share the same package, interface, and core functionality.