MAX9751

2.6W Stereo Audio Power Amplifiers and DirectDrive® Headphone Amplifiers

Integrated Audio Power Amplifiers Combine a 2.6W Stereo Amp and a DirectDrive Headphone Amp

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Overview

No DC-Blocking Capacitors Required—Provides Industry's Most Compact Notebook Audio Solution
PC2001 Compliant
5V Single-Supply Operation
Class AB 2.6W Stereo BTL Speaker Amplifiers
110mW DirectDrive Headphone Amplifiers
High 90dB PSRR
Low-Power Shutdown Mode
Industry-Leading Click-and-Pop Suppression
Low 0.01% THD+N at 1kHz
Short-Circuit and Thermal Protection
Selectable Gain Settings
Analog Volume Control (MAX9750)
BEEP Input with Glitch Filter (MAX9750)
2:1 Stereo Input MUX (MAX9751)
±8kV ESD-Protected Headphone Driver Outputs
Available in Space-Saving, Thermally Efficient 28-Pin Thin QFN (5mm x 5mm x 0.8mm) Package

The MAX9750/MAX9751/MAX9755 combine a stereo, 2.6W audio power amplifier and stereo DirectDrive 110mW headphone amplifier in a single device. The headphone amplifier uses Maxim's DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and component height. A high 90dB PSRR and low 0.01% THD+N ensures clean, low-distortion amplification of the audio signal.

The MAX9750 features an analog volume control, and a BEEP input. The MAX9751 features a 2:1 input multiplexer, allowing multiple audio sources to be selected. All devices feature a single-supply voltage, a shutdown mode, logic-selectable gain, and a headphone sense input. Industry-leading click-and-pop suppression eliminates audible transients during power and shutdown cycles.

The MAX9750/MAX9751/MAX9755 are offered in a space-saving, thermally efficient 28-pin thin QFN (5mm x 5mm x 0.8mm) package. Those devices have thermal-overload and output short-circuit protection, and are specified over the extended -40°C to +85°C temperature range.

Applications