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MAX9750-MAX9755| Datasheet

By datasheet - February 2nd, 2009

MAX9750-MAX9755| Datasheet

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19-3006; Rev 7; 1/07

2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers
General Description
The MAX9750/MAX9751/MAX9755 combine a stereo, 2.6W audio power amplifier and stereo DirectDriveTM 110mW headphone amplifier in a single device. The headphone amplifier uses Maxim's patented DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DCblocking 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, logicselectable gain, and a headphone sense input. Industryleading click-and-pop suppression eliminates audible transients during power and shutdown cycles. The MAX9750/MAX9751/MAX9755 are offered in spacesaving, thermally efficient 28-pin thin QFN (5mm x 5mm x 0.8mm) and 28-pin TSSOP packages. Both devices have thermal-over
load and output short-circuit protection, and are specified over the extended -40 C to +85 C temperature range.

Features
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 Packages 28-Pin Thin QFN (5mm x 5mm x 0.8mm) 28-Pin TSSOP

MAX9750/MAX9751/MAX9755

Applications
Notebook PCs Tablet PCs Flat-Panel TVs PC Displays

Portable DVD Players LCD Projectors

Simplified Block Diagrams
PART* MAX9750AETI+ MAX9750AEUI MAX9750BETI+ MAX9750BEUI MAX9750CETI+ MAX9750CEUI MAX9751ETI+ MAX9751EUI
VOL

Ordering Information
PINPACKAGE 28 Thin QFN 28 TSSOP 28 Thin QFN 28 TSSOP 28 Thin QFN 28 TSSOP 28 Thin QFN 28 TSSOP 28 Thin QFN 28 TSSOP MAXIMUM GAIN (dB) 13.5 13.5 19.5 19.5 10.5 10.5 10.5 10.5 10.5 10.5 PKG CODE T2855N-1 U28-2 T2855N-1 U28-2 T2855N-1 U28-2 T2855N-1 U28-2 T2855N-1 U28-2

MAX9755ETI+ MAX9755EUI
+Denotes

BEEP

lead-free package.

MAX9750

*All devices specified over the -40 C to +85 C temperature range.
U.S. Patent # 7,061,327

Simplified Block Diagrams continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products

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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.


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