MAX9750AEUI+

Audio Amplifiers Overview

The MAX9750AEUI+ is a stereo audio power amplifier and DirectDrive headphone amplifier manufactured by Analog Devices Inc./Maxim Integrated. It integrates a Class AB 2.6W BTL speaker amplifier and a 110mW DirectDrive headphone amplifier in a single device. The unit operates on a 5V single supply, features selectable gain settings, analog volume control, and a BEEP input with glitch filter. It includes industry-leading click-and-pop suppression, thermal overload protection, and output short-circuit protection.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for bulky DC-blocking capacitors by generating a ground-referenced output from a single supply.
• Integrates a 2.6W stereo BTL speaker amplifier and a 110mW stereo headphone amplifier within one package.
• Features high 90dB PSRR and low 0.01% THD+N to ensure clean, low-distortion amplification of audio signals.
• Includes logic-selectable gain, shutdown mode, headphone sense input, and ±8kV ESD-protected headphone driver outputs.

Audio Amplifiers Applications

• Notebook PCs
• Flat-Panel TVs
• Tablet PCs

Audio Amplifiers Procurement Notes

Verify the specific suffix 'EUI+' corresponds to the 28-pin TSSOP package variant rather than the standard QFN version. Confirm RoHS compliance status and lead-free certification directly with the manufacturer or authorized distributors before procurement. Ensure the component meets PC2001 standards if required for notebook applications.

Audio Amplifiers Selection Notes

Select this component when space-saving design is critical due to the elimination of large DC-blocking capacitors. Choose the MAX9750AEUI+ specifically for its analog volume control and BEEP input capabilities, which are not present in the MAX9751 or MAX9755 variants. Consider the 28-pin TSSOP package for compatibility with existing PCB footprints requiring through-hole or surface-mount TSSOP layouts.

Audio Amplifiers Part Context

This part belongs to the MAX9750/MAX9751/MAX9755 family of 2.6W stereo audio power amplifiers and DirectDrive headphone amplifiers. The MAX9750 variant is distinguished by its analog volume control and BEEP input, whereas the MAX9751 offers a 2:1 input multiplexer. All devices share the same core amplifier architecture and protection features.

Audio Amplifiers Replacement Considerations

MAX9750AETI+

Audio Amplifiers FAQ

What is the function of the HPS pin?

The HPS (Headphone Sense) input monitors the headphone jack voltage to automatically configure the device between speaker mode and headphone mode.

How does the DirectDrive architecture benefit the design?

It produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, which saves cost, board space, and reduces component height.