MAX9722AETE+TG47

Audio Amplifiers Overview

The MAX9722AETE+TG47 is a stereo headphone amplifier utilizing DirectDrive architecture. It operates from a single 2.4V to 5.5V supply and delivers up to 130mW per channel into a 32Ω load or 70mW into a 16Ω load. The device features adjustable gain for the MAX9722A variant, low 0.009% THD+N, and an 80dB PSRR at 217Hz. It includes integrated click-and-pop suppression, ±8kV ESD protection, and short-circuit/thermal-overload protection. The component is housed in a 16-pin Thin QFN package (3mm x 3mm x 0.8mm) and operates within a -40°C to +85°C temperature range.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by generating ground-referenced outputs from a single supply.
• Integrated charge pump creates a negative rail for bipolar operation without external large coupling components.
• Comprehensive click-and-pop suppression circuitry prevents audible transients during power-up and shutdown.
• High power-supply rejection ratio allows operation from noisy digital supplies without additional linear regulators.

Audio Amplifiers Applications

• Notebook and desktop PCs
• MP3 players and portable audio equipment
• Flat-panel monitors
• Cellular phones and smart phones

Audio Amplifiers Procurement Notes

Verify the specific suffix 'G47' against official Analog Devices documentation to confirm lead-free status and RoHS compliance details. Ensure the ordering part number matches the exact pin configuration and thermal pad requirements specified in the datasheet. Confirm that the supplier provides traceable manufacturing data consistent with Maxim Integrated standards.

Audio Amplifiers Selection Notes

Select this component for designs requiring space-constrained stereo audio amplification. The adjustable gain of the MAX9722A variant offers flexibility for different input levels compared to the fixed-gain MAX9722B. Consider the 16-pin Thin QFN package for minimal board footprint requirements. Evaluate the 5.5mA quiescent current against battery life constraints for portable applications.

Audio Amplifiers Part Context

This device belongs to the MAX9722 family of high-performance stereo headphone amplifiers. It shares the DirectDrive technology with related models but distinguishes itself through its specific gain configuration and packaging options. The family addresses the need for high-quality audio reproduction in portable electronics while minimizing external component count and system cost.

Audio Amplifiers Replacement Considerations

The MAX9722AEUE is a pin-compatible alternative available in a TSSOP-16 package. Verify thermal dissipation characteristics when switching between the Thin QFN and TSSOP packages to ensure adequate heat management under identical operating conditions.

Audio Amplifiers FAQ

How does the DirectDrive architecture affect low-frequency response?

By eliminating large DC-blocking capacitors, the DirectDrive architecture prevents the formation of high-pass filters that typically attenuate low frequencies, thereby preserving bass response and reducing distortion associated with capacitor voltage coefficients.

What is the function of the exposed paddle on the 16-pin Thin QFN package?

The exposed paddle can be connected to PVSS or left as a small electrically isolated copper plane. It must not be connected to PGND, SGND, PVDD, or SVDD to maintain proper device operation and isolation.