MAX9725AETC+

Audio Amplifiers Overview

The MAX9725AETC+ is a fixed-gain stereo headphone amplifier utilizing DirectDrive architecture to eliminate DC-blocking capacitors. It operates from a single 0.9V to 1.8V supply, delivering up to 20mW per channel into a 32Ω load with 0.006% THD+N. The device features an inverting charge pump for ground-referenced outputs and includes integrated click-and-pop suppression. It offers ±8kV ESD protection on outputs and a low-power shutdown mode reducing current to 0.6µA.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for large output-coupling capacitors by generating a negative supply via an internal charge pump.
• Fixed voltage gain of -2V/V reduces external component count compared to adjustable variants.
• Integrated comprehensive click-and-pop circuitry suppresses audible transients during power-up and shutdown.
• Low quiescent current consumption supports extended battery life in portable applications.

Audio Amplifiers Applications

• MP3 Players
• Cellular Phones
• PDAs
• Smart Phones
• Portable Audio Equipment

Audio Amplifiers Procurement Notes

Verify the specific suffix ETCP against the manufacturer's official ordering guide to confirm package type and temperature range. Ensure compatibility with the required PCB footprint for the 12-pin thin QFN package. Confirm that the fixed gain specification meets the system design requirements without modification.

Audio Amplifiers Selection Notes

Select this part when board space is limited and capacitor elimination is required. The fixed -2V/V gain suits designs where input signal levels are known. Consider the MAX9725E if adjustable gain flexibility is needed instead. Verify thermal dissipation capabilities within the target enclosure constraints.

Audio Amplifiers Part Context

This component belongs to the MAX9725 family of 1V DirectDrive stereo headphone amplifiers. It shares core architectural features with other variants like the MAX9725B, C, D, and E, differing primarily in fixed gain settings or adjustability. The family targets ultra-portable consumer electronics requiring high audio fidelity in minimal space.

Audio Amplifiers Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.