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WM8734 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8734 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 46 page  w WM8734 Stereo Audio CODEC WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, November 2006, Rev 4.1 Copyright 2006 Wolfson Microelectronics plc DESCRIPTION The WM8734 is a low power stereo CODEC ideal for MD, CD-RW machines and DAT recording applications. Stereo line inputs are provided, along with a mute function and programmable line level volume control. Stereo 24-bit multi-bit sigma delta ADCs and DACs are used with oversampling digital interpolation and decimation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported. Stereo audio line level outputs are provided along with anti- thump mute and power up/down circuitry. The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including level controls, mutes, de-emphasis and power management facilities. The device is available in 20-lead SSOP or 28- lead, 5x5mm QFN packages. FEATURES • Audio Performance − 90dB SNR (‘A’ weighted @ 48kHz) ADC − 100dB SNR (‘A’ weighted @ 48kHz) DAC − 2.7 – 3.6V Digital Supply Operation − 2.7 – 3.6V Analogue Supply Operation • ADC and DAC Sampling Frequency: 8kHz – 96kHz • Selectable ADC High Pass Filter • 2 or 3-Wire MPU Serial Control Interface • Programmable Audio Data Interface Modes − I 2S, Left, Right Justified or DSP − 16/20/24/32 bit Word Lengths − Master or Slave Clocking Mode • Stereo Audio Inputs and Outputs • 20-lead SSOP or 5x5mm QFN Package Options APPLICATIONS • CD and Minidisc Recorder • MP3 Player / Recorder BLOCK DIAGRAM ADC ADC DIGITAL FILTERS DIGTAL AUDIO INTERFACE CONTROL INTERFACE DAC DAC ROUT LOUT RLINEIN LLINEIN VMID AVDD AGND +12 to -34.5dB, 1.5dB Steps +12 to -34.5dB, 1.5dB Steps MUTE MUTE VOL W WM8734 CLKIN DIVIDER (Div x1, x2) VOL |
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