MAX9713ETJ+TG05

Audio Amplifiers Overview

The MAX9713ETJ+TG05 is a mono Class D audio power amplifier from Analog Devices/Maxim Integrated, housed in a 32-pin TQFN (5mm x 5mm x 0.8mm) package with an exposed paddle. It delivers up to 6W into an 8Ω load and operates on a single supply voltage ranging from 10V to 25V. The device features a proprietary filterless modulation scheme that eliminates the need for bulky output filters. Key electrical parameters include a typical quiescent current of 18mA, shutdown current of 0.2µA, and a power-supply rejection ratio of 76dB at 1kHz. It offers low total harmonic distortion plus noise of 0.07% and a signal-to-noise ratio exceeding 95dB.

Audio Amplifiers Feature Summary

• Filterless operation utilizing speaker coil inductance to recover audio signals without external output filters.
• Spread-spectrum mode that randomizes switching frequency to reduce EMI radiated emissions by approximately 5dB compared to fixed-frequency methods.
• Differential input architecture designed to minimize common-mode noise pickup from digital sources.
• Integrated click-and-pop suppression circuitry that prevents audible transients during startup, shutdown, and mute transitions.

Audio Amplifiers Applications

• LCD monitors
• LCD TVs
• Desktop PCs
• High-end notebook audio systems

Audio Amplifiers Procurement Notes

Verify the specific suffix 'TG05' against official manufacturer documentation to confirm tape-and-reel packaging or lot traceability details. Ensure the component matches the standard MAX9713ETJ+ pinout and thermal specifications. Confirm RoHS compliance status as indicated by the '+' designation in ordering information.

Audio Amplifiers Selection Notes

Select this component for designs requiring high efficiency and minimal board space due to the elimination of output LC filters. The differential inputs are suitable for noisy environments where common-mode rejection is critical. Consider the spread-spectrum feature if EMI performance is a primary constraint. Verify that the application load impedance supports the 6W output capability within the specified supply voltage range.

Audio Amplifiers Part Context

This part belongs to the MAX9713/MAX9714 family of 6W filterless Class D amplifiers. The MAX9713 variant provides a mono channel configuration, whereas the MAX9714 offers stereo channels. Both share identical modulation architectures and protection features but differ in physical package dimensions and channel count.

Audio Amplifiers Replacement Considerations

Direct functional substitutes within the same family include the MAX9714ETJ+ for stereo applications. Cross-family replacements require matching filterless topology and supply voltage ranges. Verify pin compatibility and thermal dissipation requirements when substituting with other Class D amplifiers.

Audio Amplifiers FAQ

How does the MAX9713 eliminate the need for an output filter?

It uses a proprietary modulation scheme that relies on the inherent inductance of the speaker coil and the natural filtering of the human ear to recover the audio signal from the square-wave output.

What is the benefit of the Spread-Spectrum Mode (SSM)?

SSM varies the switching frequency randomly around the center frequency, which flattens the wideband spectral components and improves EMI emissions by approximately 5dB compared to conventional fixed-frequency methods.

How is the gain configured on this device?

Gain is selected via two digital pins, G1 and G2. These pins allow for pin-selectable gain settings ranging from 13dB to 22.1dB, reducing the need for external feedback resistors.