WM8731 / WM8731L
Production Data
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
PIN CONFIGURATION - 28 PIN SSOP.................................................................3
ORDERING INFORMATION ..................................................................................3
PIN CONFIGURATION – 28 PIN QFN ...................................................................4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS.........................................................................6
RECOMMENDED OPERATING CONDITIONS – WM8731...................................6
RECOMMENDED OPERATING CONDITIONS – WM8731L.................................6
ELECTRICAL CHARACTERISTICS – WM8731....................................................7
TERMINOLOGY............................................................................................................ 9
POWER CONSUMPTION – WM8731..................................................................10
ELECTRICAL CHARACTERISTICS – WM8731L................................................11
TERMINOLOGY.......................................................................................................... 13
POWER CONSUMPTION – WM8731L................................................................14
MASTER CLOCK TIMING....................................................................................15
DIGITAL AUDIO INTERFACE – MASTER MODE....................................................... 16
DIGITAL AUDIO INTERFACE – SLAVE MODE .......................................................... 17
MPU INTERFACE TIMING.......................................................................................... 18
DEVICE DESCRIPTION.......................................................................................20
INTRODUCTION......................................................................................................... 20
AUDIO SIGNAL PATH................................................................................................. 21
DEVICE OPERATION ................................................................................................. 34
AUDIO DATA SAMPLING RATES............................................................................... 41
ACTIVATING DSP AND DIGITAL AUDIO INTERFACE .............................................. 45
SOFTWARE CONTROL INTERFACE......................................................................... 45
POWER DOWN MODES ............................................................................................ 47
REGISTER MAP ......................................................................................................... 49
DIGITAL FILTER CHARACTERISTICS...............................................................54
TERMINOLOGY.......................................................................................................... 55
DAC FILTER RESPONSES .................................................................................56
ADC FILTER RESPONSES .................................................................................57
ADC HIGH PASS FILTER ........................................................................................... 58
DIGITAL DE-EMPHASIS CHARACTERISTICS...................................................58
DIGITAL DE-EMPHASIS CHARACTERISTICS...................................................59
APPLICATIONS INFORMATION .........................................................................60
RECOMMENDED EXTERNAL COMPONENTS.......................................................... 60
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS........................................ 61
PACKAGE DIMENSIONS - SSOP .......................................................................62
PACKAGE DIMENSIONS - QFN..........................................................................63
IMPORTANT NOTICE..........................................................................................64
ADDRESS: .................................................................................................................. 64
PD, Rev 4.8, April 2009
w
2
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
