PDF XWM8734 Data sheet ( Hoja de datos )

Número de pieza	XWM8734
Descripción	Stereo Audio CODEC
Fabricantes	Wolfson
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No Preview Available ! w Stereo Audio CODEC WM8734 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 − I2S, 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 AVDD VMID AGND RLINEIN LLINEIN CONTROL INTERFACE W WM8734 VOL +12 to -34.5dB, 1.5dB Steps VOL +12 to -34.5dB, 1.5dB Steps CLKIN DIVIDER (Div x1, x2) ADC ADC DIGITAL FILTERS DAC MUTE DAC MUTE DIGTAL AUDIO INTERFACE ROUT LOUT 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 Free Datasheet http://www.datasheet4u.com/ 1 page WM8734 PIN CONFIGURATION – QFN Production Data TOP VIEW ORDERING INFORMATION - QFN DEVICE WM8734SEFL TEMPERATURE RANGE -25 to +85oC WM8734SEFL/R -25 to +85oC Note: Reel quantity = 3,500 PACKAGE 28-lead QFN (5x5x0.9mm) (Pb-free) 28-lead QFN (5x5x0.9mm) (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL 1 MSL 1 PEAK SOLDERING TEMPERATURE 260°C 260°C w PD Rev 4.1 November 2006 5 Free Datasheet http://www.datasheet4u.com/ 5 Page WM8734 MASTER CLOCK TIMING MCLK t MCLKL t MCLKH t MCLKY Production Data Figure 1 System Clock Timing Requirements Test Conditions AVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 3.3V, DGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 256fs unless otherwise stated. PARAMETER SYMBOL System Clock Timing Information MCLK System clock pulse width high TXTIH MCLK System clock pulse width low TXTIL MCLK System clock cycle time TXTIY MCLK Duty cycle TEST CONDITIONS MIN 18 18 54 40:60 TYP MAX UNIT 60:40 ns ns ns DIGITAL AUDIO INTERFACE – MASTER MODE BCLK ADCLRC WM8734 CODEC DACLRC ADCDAT DACDAT DSP ENCODER/ DECODER Figure 2 Master Mode Connection w PD Rev 4.1 November 2006 11 Free Datasheet http://www.datasheet4u.com/ 11 Page

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