MAX9725CETC+

Audio Amplifiers Overview

The MAX9725CETC+ is a fixed-gain, stereo headphone amplifier from the DirectDrive series by Analog Devices/Maxim Integrated. It operates on a single 0.9V to 1.8V supply and delivers up to 20mW per channel into a 32Ω load with 0.006% THD+N. The device features a fixed voltage gain of -1V/V, an inverting charge pump for ground-referenced outputs, and low-power shutdown mode reducing current to 0.6µA. It includes integrated click-and-pop suppression, short-circuit protection, and ±8kV ESD protection.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates DC-blocking capacitors using an internal inverting charge pump for ground-referenced outputs
• Fixed -1V/V gain configuration reduces external component count
• Low quiescent current consumption with dedicated low-power shutdown control
• Integrated comprehensive click-and-pop suppression circuitry

Audio Amplifiers Applications

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

Audio Amplifiers Procurement Notes

Verify the specific suffix ETTC against official documentation to confirm package type and tape/reel specifications. Confirm lead-free/RoHS compliance status as indicated by the plus sign. Check for obsolescence notices or product change notifications prior to finalizing procurement decisions.

Audio Amplifiers Selection Notes

Select this model when a fixed -1V/V gain is required for portable audio applications. It is suitable for designs constrained by board space due to its small footprint packages. Ensure the application requires operation from a single cell battery within the 0.9V to 1.8V range.

Audio Amplifiers Part Context

This component belongs to the MAX9725 family of 1V DirectDrive stereo headphone amplifiers. The family includes variants with different fixed gains (-2V/V, -1.5V/V, -4V/V) and an adjustable gain version (MAX9725E). All variants share the same core DirectDrive technology and low-power characteristics.

Audio Amplifiers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.