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WM8771 Arkusz danych(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8771 Arkusz danych(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 44 page ![]() w w w w WM8771 24-bit, 192kHz 8-Channel Codec WOLFSON MICROELECTRONICS LTD w :: www.wolfsonmicro.com Product Preview, December 2001, Rev 2.0 Copyright 2001 Wolfson Microelectronics Ltd. DESCRIPTION The WM8771 is a high performance, multi-channel audio codec. The WM8771 is ideal for surround sound processing applications for home hi-fi, automotive and other audio visual equipment. A stereo 24-bit multi-bit sigma delta ADC is used with a three channel input selector. Each channel has analogue domain mute and programmable gain control. Digital audio output word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported. Four stereo 24-bit multi-bit sigma delta DACs are used with oversampling digital interpolation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 192kHz are supported. Each DAC channel has independent digital attenuation and mute control. The audio data interface supports I2S, left justified, right justified and DSP digital audio formats. The device is controlled via a 3 wire serial interface. The interface provides access to all features including channel selection, volume controls, mutes, de-emphasis and power management facilities. The device is available in a 64-pin TQFP package. FEATURES • Audio Performance − 108dB SNR (‘A’ weighted @ 48kHz) DAC − 97dB SNR (‘A’ weighted @ 48kHz) ADC • DAC Sampling Frequency: 8kHz – 192kHz • ADC Sampling Frequecncy: 8kHz – 96kHz • 3-Wire SPI or CCB MPU Serial Control Interface • Master or Slave Clocking Mode • Programmable Audio Data Interface Modes − I 2S, Left, Right Justified or DSP − 16/20/24/32 bit Word Lengths • Four Independent Stereo DAC Audio Outputs • Eight stereo ADC inputs with analogue gain adjust from +19dB to –12dB in 1dB steps • 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation • 5V tolerant digital inputs • 64-Pin TQFP Package APPLICATIONS • Surround Sound Processors • Automotive Audio BLOCK DIAGRAM VOUT1L VOUT1R VOUT2L VOUT2R VOUT3L VOUT3R VOUT4L VOUT4R STEREO ADC AUDIO INTERFACE & DIGITAL FILTERS AIN2R AIN3L AIN3R AIN4L AIN4R AIN5L AIN5R AIN6L AIN6R CONTROL INTERFACE LOW PASS FILTERS LOW PASS FILTERS LOW PASS FILTERS LOW PASS FILTERS AIN2L AIN1R AIN1L AIN7L AIN7R AIN8L AIN8R w WM8771 DIGITAL FILTERS DIGITAL FILTERS DIGITAL FILTERS DIGITAL FILTERS REC1L REC1R REC2L REC2R REC3L REC3R MUTE MUTE MUTE STEREO DAC STEREO DAC STEREO DAC STEREO DAC AINOPR AINOPL CCB is a trademark of SANYO ELECTRIC CO., LTD CCB is SANYO’s original bus format and all the bus addresses are controlled by SANYO. |
Podobny numer części - WM8771 |
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Podobny opis - WM8771 |
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