WM8903CLGEFKSLASHR datasheet(4/178 Pages) WOLFSON

4 / 178 page

WM8903

Production Data

PD, Rev 4.5, June 2012

MICROPHONE HOOK SWITCH DETECTION................................................................................................................ 39

DIGITAL MICROPHONE INTERFACE .......................................................................... 40

ANALOGUE-TO-DIGITAL CONVERTER (ADC)............................................................ 42

ADC DIGITAL VOLUME CONTROL................................................................................................................................ 42

HIGH-PASS FILTER (HPF) ............................................................................................................................................. 45

ADC OVERSAMPLING RATIO (OSR) ............................................................................................................................ 46

DYNAMIC RANGE CONTROL (DRC) ........................................................................... 46

COMPRESSION/LIMITING CAPABILITIES .................................................................................................................... 46

GAIN LIMITS.................................................................................................................................................................... 48

DYNAMIC CHARACTERISTICS ..................................................................................................................................... 49

ANTI-CLIP CONTROL ..................................................................................................................................................... 50

QUICK RELEASE CONTROL ......................................................................................................................................... 50

GAIN SMOOTHING ......................................................................................................................................................... 51

INITIALISATION .............................................................................................................................................................. 52

DIGITAL MIXING............................................................................................................ 53

DIGITAL MIXING PATHS ................................................................................................................................................ 53

DAC INTERFACE VOLUME BOOST .............................................................................................................................. 54

DIGITAL SIDETONE........................................................................................................................................................ 55

DIGITAL-TO-ANALOGUE CONVERTER (DAC)............................................................ 56

DAC DIGITAL VOLUME CONTROL................................................................................................................................ 57

DAC SOFT MUTE AND SOFT UN-MUTE....................................................................................................................... 59

DAC MONO MIX.............................................................................................................................................................. 60

DAC DE-EMPHASIS........................................................................................................................................................ 60

DAC SLOPING STOPBAND FILTER .............................................................................................................................. 61

DAC BIAS CONTROL...................................................................................................................................................... 61

DAC OVERSAMPLING RATIO (OSR) ............................................................................................................................ 62

OUTPUT SIGNAL PATH ................................................................................................ 63

OUTPUT SIGNAL PATHS ENABLE................................................................................................................................ 64

HEADPHONE / LINE OUTPUT SIGNAL PATHS ENABLE ............................................................................................. 65

OUTPUT PGA BIAS CONTROL...................................................................................................................................... 68

OUTPUT DRIVERS BIAS CONTROL ............................................................................................................................. 68

OUTPUT MIXER CONTROL ........................................................................................................................................... 69

OUTPUT VOLUME CONTROL ....................................................................................................................................... 71

ANALOGUE OUTPUTS ................................................................................................. 75

HEADPHONE OUTPUTS – HPOUTL AND HPOUTR..................................................................................................... 75

LINE OUTPUTS – LINEOUTL AND LINEOUTR ............................................................................................................. 75

DIFFERENTIAL LINE OUTPUTS – LON/LOP AND RON/ROP ...................................................................................... 75

EXTERNAL COMPONENTS FOR GROUND-REFERENCED OUTPUTS...................................................................... 76

REFERENCE VOLTAGES AND MASTER BIAS ........................................................... 77

POP SUPPRESSION CONTROL .................................................................................. 79

DISABLED INPUT / OUTPUT CONTROL ....................................................................................................................... 79

DIFFERENTIAL LINE OUTPUT DISCHARGE CONTROL.............................................................................................. 79

CHARGE PUMP............................................................................................................. 80

DC SERVO..................................................................................................................... 81

DIGITAL AUDIO INTERFACE........................................................................................ 84

MASTER AND SLAVE MODE OPERATION................................................................................................................... 84

OPERATION WITH TDM................................................................................................................................................. 85

BCLK FREQUENCY ........................................................................................................................................................ 86

AUDIO DATA FORMATS (NORMAL MODE).................................................................................................................. 86

AUDIO DATA FORMATS (TDM MODE) ......................................................................................................................... 88

DIGITAL AUDIO INTERFACE CONTROL ..................................................................... 90

BCLK AND LRCLK CONTROL........................................................................................................................................ 91

COMPANDING ................................................................................................................................................................ 93

LOOPBACK ..................................................................................................................................................................... 94

WM8903CLGEFK/R Datenblatt(PDF) 4 Page - Wolfson Microelectronics plc

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