MAX9751EUI

Audio Amplifiers Overview

The MAX9751EUI+ is a stereo audio amplifier from the DirectDrive series, integrating a 2.6W Class-AB power amplifier and a 110mW DirectDrive headphone amplifier in a single 28-pin TSSOP package. It operates on a single supply voltage ranging from 4.5V to 5.5V. The device features patented DirectDrive technology for ground-referenced headphone outputs, eliminating large DC-blocking capacitors. Key electrical parameters include a Power Supply Rejection Ratio (PSRR) of up to 90dB and Total Harmonic Distortion plus Noise (THD+N) as low as 0.01%. It includes an analog volume control, a BEEP input, and a 2:1 input multiplexer for selecting between multiple audio sources.

Audio Amplifiers Feature Summary

• Integrates a high-power stereo Class-AB amplifier with a dedicated DirectDrive headphone output stage.
• Features a built-in 2:1 input multiplexer allowing selection between two distinct audio signal sources.
• Includes an analog volume control interface and a BEEP input for system signaling.
• Utilizes patented DirectDrive architecture to provide a ground-referenced output without external coupling capacitors.

Audio Amplifiers Applications

• Portable multimedia devices requiring integrated stereo amplification and headphone driving capabilities
• Mobile phones and handheld gaming consoles utilizing single-supply operation
• MP3 players and digital audio players needing low-distortion audio reproduction
• Laptop computers and notebooks with space-constrained audio subsystems

Audio Amplifiers Procurement Notes

Verify the specific suffix 'EUI' corresponds to the 28-pin TSSOP package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Check current lifecycle status as this component family may be subject to discontinuation or replacement by newer generations. Ensure the selected supplier provides valid traceability and authenticity guarantees for Analog Devices products.

Audio Amplifiers Selection Notes

Select this component when a design requires both line-level stereo amplification and direct headphone driving within a single IC footprint. The integrated input multiplexer simplifies routing for devices with multiple audio inputs. Consider the 28-pin TSSOP package for thermal performance and board space efficiency compared to larger QFN variants. Verify that the 4.5V to 5.5V supply range aligns with the system's battery or power rail specifications.

Audio Amplifiers Part Context

The MAX9751 belongs to the Maxim Integrated DirectDrive audio amplifier family, designed for portable electronics. It shares architectural similarities with the MAX9750 and MAX9755 but distinguishes itself through the inclusion of an internal 2:1 input multiplexer. This integration reduces external component count and board area, making it suitable for compact consumer electronics where multiple audio sources must be managed efficiently.

Audio Amplifiers Replacement Considerations

The MAX9750EUI+ serves as a functional substitute if the input multiplexer feature is not required. The MAX9755ETI+ offers similar performance in a different package format. Verify pin-to-pin compatibility and software configuration requirements before substituting any alternative part numbers from the same product family.