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 4.9, October 2012
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
