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MAX9776 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX9776 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 37 page General Description The MAX9775/MAX9776 combine a high-efficiency Class D, stereo/mono audio power amplifier with a mono DirectDrive™ receiver amplifier and a stereo DirectDrive headphone amplifier. Maxim’s 3rd-generation, ultra-low-EMI, Class D audio power amplifiers provide Class AB performance with Class D efficiency. The MAX9775/MAX9776 deliver 1.5W per channel into a 4Ω load from a 5V supply and offer efficiencies up to 79%. Active emissions limiting circuitry and spread-spectrum modulation greatly reduce EMI, eliminating the need for output filtering found in traditional Class D devices. The MAX9775/MAX9776 utilize a fully differential archi- tecture, a full-bridged output, and comprehensive click- and-pop suppression. A 3D stereo enhancement function allows the MAX9775 to widen the stereo sound field immersing the listener in a cleaner, richer sound experience than typically found in portable applications. The devices utilize a flexible, user-defined mixer archi- tecture that includes an input mixer, volume control, and output mixer. All control is done through I2C. The mono receiver amplifier and stereo headphone amplifier use Maxim’s patented† 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. The MAX9775/MAX9776 are available in a 32-pin TQFN (5mm x 5mm) or a 32-bump UCSP™ (3mm x 3mm) package and specified over the extended -40°C to +85°C temperature range. Applications Cell Phones Portable Multimedia Players Handheld Gaming Consoles Features o Unique Spread-Spectrum Modulation and Active Emissions Limiting Significantly Reduces EMI o 3D Stereo Enhancement (MAX9775 Only) o Up to 3 Stereo Inputs o 1.5W Stereo Speaker Output (4Ω, VDD = 5V) o 50mW Mono Receiver/Stereo Headphone Outputs (32Ω, VDD = 3.3V) o High PSRR (68dB at 217Hz) o 79% Efficiency (VDD = 3.3V, RL = 8Ω, POUT = 470mW) o I2C Control—Input Configuration, Volume Control, Output Mode o Click-and-Pop Suppression o Low Total Harmonic Distortion (0.03% at 1kHz) o Current-Limit and Thermal Protection 2 x 1.5W, Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier ________________________________________________________________ Maxim Integrated Products 1 Ordering Information MAX9775 MIXER/ MUX GAIN CONTROL 3D SOUND CONTROL I2C INTERFACE SINGLE SUPPLY 2.7V TO 5.5V MAX9776 MIXER/ MUX GAIN CONTROL I2C INTERFACE SINGLE SUPPLY 2.7V TO 5.5V Simplified Block Diagrams 19-0746; Rev 1; 7/07 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Pin Configurations appear at end of data sheet. EVALUATION KIT AVAILABLE PART PIN- PACKAGE PKG CODE CLASS D AMPLIFIER MAX9775ETJ+* 32 TQFN-EP** T3255-4 Stereo MAX9775EBX+T* 32 UCSP-32 B36-4 Stereo MAX9776ETJ+ 32 TQFN-EP** T3255-4 Mono MAX9776EBX+T 32 UCSP-32 B36-4 Mono †U.S. Patent# 7,061,327 Note: All devices are specified over the -40°C to +85°C oper- ating temperature range. + Denotes lead-free package. * Future product—contact factory for availability. ** EP = Exposed pad. UCSP is a trademark of Maxim Integrated Products, Inc. |
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