MAX9722AETE+G

Audio Amplifiers Overview

The MAX9722AETE+G is a stereo headphone amplifier utilizing DirectDrive architecture to eliminate bulky DC-blocking capacitors. It operates on a single 2.4V to 5.5V supply, delivering up to 130mW per channel into a 32Ω load or 70mW into a 16Ω load. The device features adjustable gain via external resistors, low 0.009% THD+N, and an integrated charge pump for bipolar operation. It includes comprehensive click-and-pop suppression, ±8kV ESD protection, and a shutdown mode reducing current to 0.1µA.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for large output-coupling capacitors by generating an internal negative rail.
• Adjustable gain configuration allows flexibility in system design without fixed internal resistor networks.
• Integrated click-and-pop suppression circuitry prevents audible transients during power-up and shutdown.
• High power-supply rejection ratio enables stable operation from noisy digital supplies.

Audio Amplifiers Applications

• Portable audio equipment
• Cellular phones
• Smart phones

Audio Amplifiers Procurement Notes

Verify that the suffix +G indicates lead-free compliance and RoHS adherence as per standard Maxim Integrated conventions. Confirm the package type matches the required board space constraints. Ensure the ordering code corresponds to the specific gain configuration needed for the application.

Audio Amplifiers Selection Notes

Select this component when board space is limited and the elimination of large electrolytic capacitors is required. The adjustable gain feature suits designs needing specific voltage matching. Verify that the 2.4V minimum supply voltage aligns with the system's battery profile.

Audio Amplifiers Part Context

This part belongs to the MAX9722 family of stereo headphone amplifiers. It shares the DirectDrive technology with the MAX9722B but differs in gain configuration. The family is designed for portable electronics requiring high performance in small packages.

Audio Amplifiers Replacement Considerations

MAX9722AEUE+T is a pin-compatible alternative in a TSSOP package. MAX9722BEUE+T offers fixed gain in a TSSOP package. Verify thermal dissipation requirements when switching between QFN and TSSOP packages.

Audio Amplifiers FAQ

How does the DirectDrive architecture benefit the design?

It generates an internal negative supply, allowing ground-referenced outputs and eliminating the need for large DC-blocking capacitors, which saves board space and cost.

What is the purpose of the SHDN pin?

Driving the SHDN pin low disables the amplifiers and charge pump, reducing supply current to 0.1µA and muting the audio output.