MAX9713ETJ+T

Audio Amplifiers Overview

The MAX9713ETJ+T is a mono/stereo Class D audio power amplifier from Analog Devices/Maxim Integrated. It delivers up to 6W output power into an 8Ω load with greater than 85% efficiency. The device operates on a single supply voltage ranging from 10V to 25V and features a fully differential architecture. Key electrical parameters include a quiescent current of 18mA, shutdown current of 0.2µA, and a power-supply rejection ratio (PSRR) of 76dB at 1kHz. Total Harmonic Distortion Plus Noise (THD+N) is specified at 0.07%, while the signal-to-noise ratio exceeds 95dB. The switching frequency can be configured via pin selection, offering fixed-frequency modes or spread-spectrum mode for EMI reduction.

Audio Amplifiers Feature Summary

• Filterless Class D architecture eliminates the need for bulky output filters by utilizing proprietary modulation schemes.
• Spread-spectrum mode reduces radiated electromagnetic interference emissions compared to conventional fixed-frequency methods.
• Integrated comprehensive click-and-pop suppression minimizes audible transients during startup and shutdown sequences.
• Pin-selectable gain configuration allows flexibility in system design while reducing external component count.

Audio Amplifiers Applications

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

Audio Amplifiers Procurement Notes

Verify the specific suffix ETJ corresponds to the 32-pin TQFN package with exposed paddle as documented. Confirm lead-free status (+ suffix) matches RoHS requirements. Ensure the mono configuration aligns with system needs, distinguishing it from the stereo MAX9714 variant. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and revision level before procurement.

Audio Amplifiers Selection Notes

Select this component for applications requiring high efficiency and minimal board space without output filtering. Consider the 10V to 25V single-supply operation range when designing power rails. Evaluate the thermal performance based on the 32-pin TQFN package derating curves for multilayer boards. Ensure speaker loads have sufficient series inductance to support filterless operation effectively.

Audio Amplifiers Part Context

This device belongs to the MAX9713/MAX9714 family of 6W filterless Class D amplifiers. It shares architectural similarities with other Maxim Integrated audio power amplifiers but is distinct in its specific pinout and mono channel configuration. The ETJ suffix denotes the thin QFN package type, differentiating it from other packaging options within the broader product line.

Audio Amplifiers Replacement Considerations

The MAX9714ETJ+T serves as a direct functional substitute if stereo output capability is required instead of mono. Verify that any replacement maintains the same 32-pin TQFN footprint and pin compatibility to ensure seamless integration into existing PCB layouts without redesigning the board.

Audio Amplifiers FAQ

Does the MAX9713ETJ+T require an output LC filter?

No, the device utilizes a proprietary filterless modulation scheme that relies on the inherent inductance of the speaker coil to recover the audio signal, eliminating the need for traditional output filters.

How is the spread-spectrum mode enabled?

The spread-spectrum mode is enabled by setting both FS1 and FS2 logic inputs to a high state, which varies the switching frequency randomly to reduce EMI emissions.