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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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LM49450SQX/NOPB Scheda tecnica(PDF) 2 Page - Texas Instruments |
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LM49450SQX/NOPB Scheda tecnica(HTML) 2 Page - Texas Instruments |
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2 / 44 page  REF CPGND I 2 C INTERFACE I2C BUS CS CS VDD MCLK I2S_CLK I2S_SDI I2S_WS SDA SCL DGND HPR HPL LSGND RLS- RLS+ LLS- LLS+ LSVDD LSVDD VDD HPS CREF CLASS D CLASS D CLASS AB CLASS AB INL INR 24-BIT STEREO DAC 32-STEP VOLUME CONTROL CHARGE PUMP C1 C1P C1N HPVDD HPGND CS CPVDD CPVDD C2 HPVSS L R OSCILLATOR HPVDD I 2 S INTERFACE 3D PROCESSOR CS BYPASS CBYPASS GND IOVDD DVDD 1.8V to 4.5V 2.7V to 4.5V IOVDD DVDD 2.7V to 5.5V LM49450 SNAS440D – FEBRUARY 2008 – REVISED MAY 2013 www.ti.com DESCRIPTION (CONTINUED) The filterless Class D amplifiers deliver 1.25W/channel into an 8 Ω load with <1% THD+N with a 5V supply. The LM49450 offers two logic selectable modulation schemes, fixed frequency mode, and an EMI reducing spread spectrum mode. The 36mW/channel headphone drivers feature TI’s ground referenced architecture that creates a ground-referenced output from a single supply, eliminating the need for bulky and expensive DC-blocking capacitors, saving space and minimizing system cost. A headphone sense input (HPS) automatically detects the presence of a headphone, and configures the device accordingly. The LM49450 stereo, 24-bit DAC supports a wide range of sample rates (including 192kHz, 96kHz, 48kHz, and 44.1kHz). The digital audio signal path features better than 100dB SNR, and low 0.05% THD+N when measured at the headphone outputs. The flexible 3-wire I2S interface supports left or right justified audio data. The LM49450 features separate 32-step volume control for the headphones and speaker outputs. 3D enhancement, mode selection, shutdown control, and volume are controlled through an I2C compatible interface. Output short circuit and thermal overload protection prevent the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49450 is available in a space saving 32-pin WQFN package. Typical Application Figure 1. Typical Audio Amplifier Application Circuit 2 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: LM49450 |
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