MAX4411BETP+

Audio Amplifiers Overview

The MAX4411BETP+ 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 bulky DC-blocking capacitors. The device features an internally set gain of -2V/V and delivers up to 80mW per channel into a 16Ω load with low distortion. It operates from a 1.8V to 3.6V supply, consumes 5mA quiescent current, and includes independent shutdown controls, click-and-pop suppression, and ±8kV ESD protection on outputs.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for large output-coupling capacitors by generating an internal negative supply for ground-referenced outputs.
• Fixed internal gain configuration of -2V/V removes the requirement for external feedback networks.
• Independent left/right active-low shutdown controls optimize power consumption in mixed-mode applications.
• Integrated comprehensive click-and-pop suppression circuitry prevents audible transients during startup and shutdown.

Audio Amplifiers Applications

• Notebook PCs
• Cellular Phones
• Portable Audio Equipment

Audio Amplifiers Procurement Notes

Verify that the ordering suffix ETP corresponds to the 20-pin Thin QFN package as specified in the official documentation. Confirm lead-free status (+) and temperature range (-40°C to +85°C). Ensure compatibility with the specific gain variant required, as the B suffix denotes the -2V/V gain setting distinct from the standard MAX4411.

Audio Amplifiers Selection Notes

Select this component when board space is limited and the elimination of large DC-blocking capacitors is critical. The fixed -2V/V gain suits designs requiring higher amplification without external resistors. Verify that the 1.8V to 3.6V supply range aligns with the system power rails and that the 20-pin QFN package fits the PCB layout constraints.

Audio Amplifiers Part Context

This part belongs to the MAX4411 family of stereo headphone drivers. It shares the core DirectDrive technology and protection features with other variants but differs in gain settings and packaging. The MAX4411B specifically provides a -2V/V gain, whereas the standard MAX4411 offers -1.5V/V. The ETP suffix indicates the 20-pin Thin QFN package option.

Audio Amplifiers Replacement Considerations

MAX4411ETP (Standard Gain Variant)

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 audio fidelity at lower frequencies.

What is the function of the SHDNL and SHDNR pins?

These are active-low shutdown controls for the left and right channels respectively. Driving them low disables the channel, increases output impedance, and reduces supply current.