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WM8773 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8773 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 29 page  WM8773 24-bit, 96kHz ADC with 8 Channel I/P Multiplexer WOLFSON MICROELECTRONICS LTD w :: www.wolfsonmicro.com Product Preview, April 2002, Rev 1.0 Copyright 2002 Wolfson Microelectronics Ltd. DESCRIPTION The WM8773 is a high performance, stereo audio ADC with an 8 channel input selector. The WM8773 is ideal for digitising multiple analogue sources 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 an eight stereo 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. The audio data interface supports I 2S, 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 − 102dB SNR (‘A’ weighted @ 48kHz) ADC • ADC Sampling Frequency: 8kHz – 96kHz • 3-Wire SPI 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 • Analogue Record Monitor 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 APPLICATIONS • Surround Sound AV Processors and Hi-Fi systems • Automotive Audio BLOCK DIAGRAM STEREO ADC AUDIO INTERFACE AND DIGITAL FILTERS AIN2R AIN3L AIN3R AIN4L AIN4R AIN5L AIN5R AIN6L AIN6R RECL RECR AINOPR AINOPL CONTROL INTERFACE AIN2L AIN1R AIN1L AIN7L AIN7R AIN8L AIN8R WM8773 MUTE ADCLRC BCLK DOUT MCLK |
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