MAX9722BEUE+

Audio Amplifiers Overview

The MAX9722BEUE+ is a stereo headphone amplifier from Analog Devices/Maxim Integrated, utilizing DirectDrive architecture to eliminate bulky DC-blocking capacitors. It operates on a single 2.4V to 5.5V supply and delivers 130mW per channel into a 32Ω load or 70mW into a 16Ω load. The device features a fixed internal gain of -2V/V, low THD+N of 0.009%, and high PSRR of 80dB at 217Hz. It includes integrated click-and-pop suppression, ±8kV ESD protection, and a low-power shutdown mode reducing current to 0.1µA. Available in a 16-pin TSSOP package.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for large output-coupling capacitors by generating ground-referenced outputs from a single supply.
• Fixed internal gain of -2V/V simplifies circuit design by removing external resistor networks.
• Integrated comprehensive click-and-pop suppression ensures silent startup and shutdown operations.
• 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 'UE+' corresponds to the 16-pin TSSOP package variant when sourcing. Confirm that the fixed -2V/V gain configuration aligns with the system's input signal requirements, as this parameter cannot be adjusted externally unlike the MAX9722A version. Ensure compatibility with the required operating temperature range of -40°C to +85°C for the intended application environment.

Audio Amplifiers Selection Notes

Select the MAX9722BEUE+ when board space conservation is critical due to its elimination of external DC-blocking capacitors. Choose this model over the adjustable-gain MAX9722A if a fixed -2V/V amplification factor is sufficient for the application. Consider the 16-pin TSSOP package for surface-mount assembly requirements where the thin QFN footprint is not preferred. Verify that the 5.5mA quiescent current fits within the system's power budget.

Audio Amplifiers Part Context

This component belongs to the MAX9722 family of stereo headphone amplifiers designed for portable electronics. It shares the same DirectDrive technology and core performance metrics as the MAX9722A but differs in gain configuration. The BEUE+ designation specifically identifies the B-version with fixed gain housed in a TSSOP-16 package, distinguishing it from the A-version and QFN package options within the series.

Audio Amplifiers Replacement Considerations

The MAX9722AEUE+ serves as a functional substitute within the same family, offering identical electrical characteristics except for an externally adjustable gain instead of the fixed -2V/V setting. Designers must account for the different gain configuration when swapping between these variants.