WM8983
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TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATING CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
TERMINOLOGY............................................................................................................ 9
SPEAKER OUTPUT THD VERSUS POWER ......................................................10
POWER CONSUMPTION ....................................................................................11
TYPICAL SCENARIOS................................................................................................ 11
AUDIO PATHS OVERVIEW.................................................................................12
SIGNAL TIMING REQUIREMENTS.....................................................................13
SYSTEM CLOCK TIMING ........................................................................................... 13
AUDIO INTERFACE TIMING – MASTER MODE ........................................................ 13
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 14
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 15
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 16
INTERNAL POWER ON RESET CIRCUIT ..........................................................17
DEVICE DESCRIPTION.......................................................................................19
INTRODUCTION......................................................................................................... 19
INPUT SIGNAL PATH................................................................................................. 21
ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 29
INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 33
OUTPUT SIGNAL PATH ............................................................................................. 38
3D STEREO ENHANCEMENT.................................................................................... 45
ANALOGUE OUTPUTS............................................................................................... 45
DIGITAL AUDIO INTERFACES................................................................................... 62
AUDIO SAMPLE RATES............................................................................................. 69
MASTER CLOCK AND PHASE LOCKED LOOP (PLL)............................................... 69
GENERAL PURPOSE INPUT/OUTPUT...................................................................... 72
OUTPUT SWITCHING (JACK DETECT)..................................................................... 72
CONTROL INTERFACE.............................................................................................. 74
RESETTING THE CHIP .............................................................................................. 75
POWER SUPPLIES .................................................................................................... 75
POWER MANAGEMENT ............................................................................................ 75
REGISTER MAP...................................................................................................77
DIGITAL FILTER CHARACTERISTICS...............................................................79
TERMINOLOGY.......................................................................................................... 79
DAC FILTER RESPONSES......................................................................................... 80
ADC FILTER RESPONSES......................................................................................... 80
HIGHPASS FILTER..................................................................................................... 81
5-BAND EQUALISER.................................................................................................. 82
APPLICATIONS INFORMATION .........................................................................86
RECOMMENDED EXTERNAL COMPONENTS.......................................................... 86
IMPORTANT NOTICE..........................................................................................88
PP Rev 1.1 August 2005
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
