MAX9721AEBC

Audio Amplifiers Overview

The MAX9721AEBC is a fixed-gain, stereo headphone amplifier utilizing DirectDrive architecture. It operates from 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 an 80dB PSRR at 1kHz, ±8kV ESD protection on outputs, and comprehensive click-and-pop suppression. Supply current is 2.2mA typical, reducing to 1.0µA in shutdown mode. It is specified over the -40°C to +85°C temperature range.

Audio Amplifiers Feature Summary

• DirectDrive technology generates ground-referenced outputs from a single supply, eliminating external DC-blocking capacitors.
• Fixed gain configuration removes the need for external feedback networks.
• Integrated click-and-pop circuitry suppresses audible transients during power transitions.

Audio Amplifiers Applications

• Portable MP3 players
• Personal Digital Assistants (PDAs)
• Handheld telephones

Audio Amplifiers Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to historical Maxim integration. Confirm package integrity and pin alignment against UCSP or QFN specifications. Review datasheet revisions for any parameter updates. Ensure environmental compliance matches project requirements. Validate thermal performance within the specified operating range.

Audio Amplifiers Selection Notes

Select this component for space-constrained portable audio designs requiring single-cell battery operation. The fixed gain variants simplify schematic design by removing feedback resistors. Evaluate the low supply voltage compatibility with single AA or AAA batteries. Consider the shutdown feature for extending battery life in standby modes.

Audio Amplifiers Part Context

This part belongs to the MAX9721 series of stereo headphone amplifiers. It represents Maxim Integrated's DirectDrive solution before the company's acquisition by Analog Devices. The series focuses on minimizing external component count and board area for mobile consumer electronics.

Audio Amplifiers Replacement Considerations

Consult official Analog Devices documentation for verified cross-reference part numbers. Verify electrical parameters and pinout compatibility before substitution. Check for updated packaging options or revised specifications in newer generations.