MAX9724BEBC+TG45

Audio Amplifiers Overview

The MAX9724BEBC+TG45 is a stereo headphone amplifier utilizing DirectDrive architecture for single-supply operation. It delivers up to 60mW per channel into a 32Ω load with 0.02% THD+N. The device operates from a 2.7V to 5.5V supply, consuming 3.5mA quiescent current and less than 0.1μA in shutdown mode. It features an internally fixed gain of -1.5V/V, 80dB PSRR at 1kHz, and integrated click-and-pop suppression. Available in a 12-bump UCSP package.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by generating an internal negative supply via a charge pump.
• Low RF susceptibility design prevents demodulation of coupled noise from input and supply traces.
• Integrated comprehensive click-and-pop suppression circuitry ensures quiet startup and shutdown transitions.
• Includes thermal-overload protection and short-circuit protection for robust operation.

Audio Amplifiers Applications

• Cellular Phones
• MP3 Players
• Notebook PCs
• Handheld Gaming Consoles

Audio Amplifiers Procurement Notes

Verify the specific suffix +TG45 indicates lead-free/RoHS compliance and tape-and-reel packaging as documented in the ordering information. Confirm the BEBC variant corresponds to the fixed -1.5V/V gain configuration rather than the adjustable AEBC version. Ensure compatibility with the specified 12-bump UCSP footprint during procurement.

Audio Amplifiers Selection Notes

Select this component when board space is limited and external output coupling capacitors must be avoided. Choose the MAX9724BEBC+TG45 over the MAX9724AEBC+TG45 if a fixed voltage gain of -1.5V/V is required, eliminating the need for external feedback resistors. Suitable for portable devices requiring low-power shutdown modes.

Audio Amplifiers Part Context

This part belongs to the MAX9724 family of DirectDrive stereo headphone amplifiers manufactured by Analog Devices/Maxim Integrated. The family includes variants with adjustable or fixed gains and different package options such as thin QFN. The MAX9724 series is designed specifically for portable equipment where minimizing component count and board area is critical.

Audio Amplifiers Replacement Considerations

MAX9724AEBC+TG45 (Adjustable Gain Variant)

Audio Amplifiers FAQ

How does the DirectDrive architecture differ from conventional headphone amplifiers?

Conventional amplifiers bias outputs at half-supply, requiring large DC-blocking capacitors. DirectDrive uses a charge pump to create an internal negative supply, allowing ground-referenced outputs without external coupling capacitors.

What is the function of the SHDN pin on the MAX9724BEBC+TG45?

The SHDN pin controls the low-power shutdown mode. Driving it low disables the amplifiers and charge pump, reducing current consumption to less than 0.1μA to extend battery life.