WM8961
Pre-Production
TABLE OF CONTENTS
BLOCK DIAGRAM.................................................................................................2
PIN CONFIGURATION...........................................................................................5
ORDERING INFORMATION ..................................................................................5
PIN DESCRIPTION ................................................................................................6
ABSOLUTE MAXIMUM RATINGS.........................................................................7
ABSOLUTE MAXIMUM RATINGS.........................................................................7
RECOMMENDED OPERATING CONDITIONS .....................................................7
ELECTRICAL CHARACTERISTICS......................................................................8
TYPICAL POWER CONSUMPTION ....................................................................12
COMMON TEST CONDITIONS................................................................................... 12
MEASUREMENTS ...................................................................................................... 12
SIGNAL TIMING REQUIREMENTS.....................................................................14
SYSTEM CLOCK TIMING ........................................................................................... 14
AUDIO INTERFACE TIMING – MASTER MODE......................................................... 14
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 15
CONTROL INTERFACE TIMING................................................................................. 16
INTERNAL POWER ON RESET CIRCUIT.................................................................. 17
DEVICE DESCRIPTION.......................................................................................19
INTRODUCTION......................................................................................................... 19
CONTROL INTERFACE.............................................................................................. 20
INPUT SIGNAL PATH ................................................................................................. 22
ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 26
AUTOMATIC LEVEL CONTROL (ALC)....................................................................... 31
OUTPUT SIGNAL PATH ............................................................................................. 35
ANALOGUE OUTPUTS............................................................................................... 41
HEADPHONE PLAYBACK MODES ............................................................................ 46
INPUT AND OUTPUT VOLUME UPDATES ................................................................ 51
DC SERVO.................................................................................................................. 53
CHARGE PUMP.......................................................................................................... 56
DIGITAL AUDIO INTERFACE ..................................................................................... 58
CONTROL WRITE SEQUENCER ............................................................................... 65
CLOCKING AND SAMPLE RATES ............................................................................. 71
VMID GENERATOR.................................................................................................... 78
THERMAL SHUTDOWN AND STATUS ...................................................................... 79
CHIP DEVICE ID......................................................................................................... 80
CHIP SOFTWARE RESET.......................................................................................... 80
REGISTER MAP ..................................................................................................81
REGISTER BITS BY ADDRESS.................................................................................. 83
DIGITAL FILTER CHARACTERISTICS.............................................................101
DAC FILTER RESPONSES....................................................................................... 102
ADC FILTER RESPONSES....................................................................................... 104
DE-EMPHASIS FILTER RESPONSES...................................................................... 106
APPLICATIONS INFORMATION.......................................................................107
RECOMMENDED EXTERNAL COMPONENTS........................................................ 107
SPEAKER SELECTION............................................................................................. 108
PCB LAYOUT CONSIDERATIONS........................................................................... 109
EXAMPLE CONFIGURATIONS................................................................................. 110
PP, August 2009, Rev 3.1
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
