MAX9751ETI+

Audio Amplifiers Overview

The MAX9751ETI+ is a Class AB stereo audio power amplifier and DirectDrive headphone amplifier. It delivers 2.6W output to speakers and 110mW to headphones from a single 5V supply. The device features a 2:1 stereo input multiplexer, selectable gain settings, and industry-leading click-and-pop suppression. It operates within an extended temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Integrates a 2:1 stereo input multiplexer for selecting between multiple audio sources
• DirectDrive architecture eliminates the need for bulky DC-blocking capacitors in headphone circuits
• Includes comprehensive click-and-pop suppression to prevent audible transients during power cycles
• Features automatic headphone detection via the HPS pin to switch between speaker and headphone modes

Audio Amplifiers Applications

• Notebook PCs
• Tablet PCs
• Flat-Panel TVs
• Portable DVD Players

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix ETI+ corresponds to the 28-pin Thin QFN package with lead-free/RoHS compliance. Confirm that the logic-selectable gain configuration matches the system requirements, as this variant differs from models with analog volume controls or beep inputs. Ensure thermal management meets the exposed paddle soldering requirements specified in the datasheet.

Audio Amplifiers Selection Notes

Select the MAX9751ETI+ when a system requires switching between two distinct audio inputs without external multiplexing components. This model is appropriate for designs prioritizing space savings through the elimination of large coupling capacitors. Verify that the required gain setting aligns with the fixed options available for this specific part number variant.

Audio Amplifiers Part Context

This component belongs to the MAX9750/MAX9751/MAX9755 family of integrated audio amplifiers. While sharing the same core amplifier architecture and package, the MAX9751 is distinguished by its inclusion of a 2:1 input multiplexer. Other variants in the series offer different control interfaces, such as analog volume adjustment or dedicated beep inputs, catering to diverse application needs.

Audio Amplifiers Replacement Considerations

MAX9750AETI+

Audio Amplifiers FAQ

How does the MAX9751 handle input signal selection?

The device incorporates a 2:1 stereo input multiplexer, allowing the user to select between two separate left and right audio input channels using logic-level control signals.

What mechanism prevents audible noise during startup?

The MAX9751 utilizes industry-leading click-and-pop suppression technology to eliminate audible transients that typically occur during power-on and shutdown cycles.