2.6W Stereo Audio Power Amplifiers and DirectDrive® Headphone Amplifiers

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

* Flat-Panel TVs * LCD Projectors * Notebook PCs * PC Displays * Portable DVD Players * Tablet PCs

* 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