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MAX9768 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX9768 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 25 page General Description The MAX9768 mono 10W Class D speaker amplifier provides high-quality, efficient audio power with an inte- grated volume control function. The MAX9768 features a 64-step dual-mode (analog or digitally programmable) volume control and mute func- tion. The audio amplifier operates from a 4.5V to 14V single supply and can deliver up to 10W into an 8Ω speaker with a 14V supply. A selectable spread-spectrum mode reduces EMI-radiat- ed emissions, allowing the device to pass EMC testing with ferrite bead filters and cable lengths up to 1m. The MAX9768 can be synchronized to an external clock, allowing synchronization of multiple Class D amplifiers. The MAX9768 features high 77dB PSRR, low 0.08% THD+N, and SNR up to 97dB. Robust short-circuit and thermal-overload protection prevent device damage during a fault condition. The MAX9768 is available in a 24-pin thin QFN-EP (4mm x 4mm x 0.8mm) package and is specified over the extended -40°C to +85°C tem- perature range. Applications Features ♦ 10W Output (8Ω, PVDD = 14V, THD+N = 10%) ♦ Patented Spread-Spectrum Modulation ♦ Meets EN55022B EMC with Ferrite Bead Filters ♦ Amplifier Operation from 4.5V to 14V Supply ♦ 64-Step Integrated Volume Control (I2C or Analog) ♦ Low 0.08% THD+N (RL = 8Ω, POUT = 6W) ♦ High 77dB PSRR ♦ Two tON Times Offered MAX9768—220ms MAX9768B—15ms ♦ Low-Power Shutdown Mode (0.5µA) ♦ Short-Circuit and Thermal-Overload Protection 10W Mono Class D Speaker Amplifier with Volume Control ________________________________________________________________ Maxim Integrated Products 1 19-0854; Rev 0; 9/07 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 Configuration located at end of data sheet. Ordering Information Note: All devices are specified over the -40°C to +85°C oper- ating temperature range. + Denotes lead-free package. * EP = Exposed pad. PART PIN-PACKAGE tON (ms) PKG CODE MAX9768ETG+ 24 TQFN-EP* 220 T2444+4 MAX9768BETG+ 24 TQFN-EP* 15 T2444+4 MUTE SHDN SPEAKER AUDIO INPUT FILTERLESS CLASS D SPEAKER OUTPUT ANALOG OR I2C VOLUME CONTROL 3.3V 4.5V TO 14V MAX9768 Simplified Block Diagram MAX9768 EMI WITH FERRITE BEAD FILTERS (VDD = 12V, 1m CABLE, 8Ω LOAD) FREQUENCY (MHz) 900 800 100 200 300 500 600 400 700 5 10 15 20 25 30 35 40 0 0 1000 OVER 20dB MARGIN TO EN55022B LIMIT Notebook Computers Flat-Panel Displays Multimedia Monitors GPS Navigation Systems Security/Personal Mobile Radio |
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