MAX4411ETP+

Audio Amplifiers Overview

The MAX4411ETP+ is a fixed-gain, stereo headphone amplifier designed for portable equipment. It utilizes DirectDrive architecture to produce ground-referenced outputs from a single supply, eliminating large DC-blocking capacitors. The device delivers up to 80mW per channel into a 16Ω load with low 0.003% THD+N. It operates from a single 1.8V to 3.6V supply, consuming only 5mA of quiescent current. The unit features independent left/right shutdown controls, ±8kV ESD protection on outputs, and integrated click-and-pop suppression. It is specified over an extended temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates bulky DC-blocking capacitors by generating internal negative supply via charge pump
• Fixed internal gain configuration removes need for external feedback network components
• Ground-referenced outputs prevent DC-bias voltages on headphone ground pins
• Independent left/right shutdown controls optimize power savings in mixed-mode applications

Audio Amplifiers Applications

• Notebook PCs
• Cellular Phones
• PDAs
• MP3 Players
• Smart Phones

Audio Amplifiers Procurement Notes

Verify the specific suffix ET indicates the 20-pin Thin QFN package variant when sourcing replacements or verifying inventory. Confirm lead-free status through RoHS compliance documentation provided by Analog Devices/Maxim Integrated. Ensure the ordering code matches the required gain specification (-1.5V/V) distinct from the MAX4411B variant. Cross-reference pin configurations to avoid compatibility issues with existing PCB layouts.

Audio Amplifiers Selection Notes

Select this component for designs requiring high audio fidelity in space-constrained portable devices. The fixed -1.5V/V gain simplifies circuit design by removing external resistors. Consider the 20-pin Thin QFN package for its thermal performance and board space efficiency compared to smaller alternatives. Evaluate the 80mW output capability against specific headphone impedance requirements to ensure adequate drive strength without distortion.

Audio Amplifiers Part Context

This part belongs to the MAX4411 family of stereo headphone amplifiers manufactured by Analog Devices/Maxim Integrated. The series is characterized by its proprietary DirectDrive technology, which differentiates it from conventional single-supply drivers that require midrail biasing. The family targets the mobile consumer electronics market, emphasizing low component count and high sound quality within minimal physical footprints.

Audio Amplifiers Replacement Considerations

MAX4411EBE+T (UCSP-16 package)

Audio Amplifiers FAQ

How does the DirectDrive architecture affect low-frequency response?

By eliminating large DC-blocking capacitors, the DirectDrive architecture prevents the high-pass filtering effect that typically attenuates low frequencies, thereby preserving bass response.

What is the function of the SHDN_ pins?

The SHDNL and SHDNR pins provide independent active-low shutdown control for the left and right channels, allowing for individual channel muting and significant power reduction.