MAX98400AETX+T

Audio Amplifiers Overview

The MAX98400AETX+T is a stereo Class D amplifier delivering 2x20W into 8Ω loads or 1x40W into a 4Ω load. It operates from an 8V to 28V single supply with up to 90% efficiency at 12V. The device features integrated clipping limiting, thermal foldback, and overcurrent protection. Filterless modulation enables compliance with EN55022B EMI limits using minimal external components. Eight digitally controlled gain settings are available via G1/G2 pins. The unit includes comprehensive click-and-pop suppression and shutdown modes reducing current to 8μA.

Audio Amplifiers Feature Summary

• Integrated clipping limiter prevents output distortion and protects speakers from transient voltages.
• Filterless modulation design passes EN55022B EMI limits with only ferrite beads and small capacitors.
• Thermal foldback automatically reduces power dissipation above junction temperature thresholds.
• Comprehensive click-and-pop reduction circuitry minimizes audible transients during state transitions.

Audio Amplifiers Applications

• LCD/PDP Televisions
• LCD Monitors
• MP3 Docking Stations
• Notebook PCs

Audio Amplifiers Procurement Notes

Verify the specific suffix ETX corresponds to the TQFN package and tape-and-reel delivery format as defined in the official Maxim Integrated ordering information. Confirm that the + symbol indicates lead-free status per RoHS standards. Ensure the component matches the MAX98400A variant specifications rather than the MAX98400B when designing for high-power applications.

Audio Amplifiers Selection Notes

Select this part for applications requiring high power density and efficient thermal management without complex output filtering. The MAX98400A supports mono parallel operation for higher power needs compared to the MAX98400B. Consider the 36-pin TQFN package for optimal heat dissipation. Verify input signal levels against the differential input range to ensure proper gain configuration using the digital control pins.

Audio Amplifiers Part Context

This component belongs to the MAX98400 family of high-performance, thermally efficient Class D amplifiers manufactured by Analog Devices (Maxim Integrated). The family includes the MAX98400A and MAX98400B variants, differentiated primarily by their maximum output power capabilities. These devices are designed to replace traditional linear amplifiers in space-constrained audio systems.

Audio Amplifiers Replacement Considerations

The MAX98400BETG-T is a related variant within the same family offering lower power output (2x12W into 8Ω) but sharing similar interface and protection features. Designers should verify pin compatibility and thermal requirements when substituting between the A and B variants.