Production Data
WM8772
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM - 28 LEAD SSOP ....................................................................1
BLOCK DIAGRAM – 32 LEAD TQFP....................................................................2
TABLE OF CONTENTS .........................................................................................3
PIN CONFIGURATION - 28 LEAD SSOP.............................................................5
ORDERING INFORMATION ..................................................................................5
PIN CONFIGURATION 32 LEAD TQFP...............................................................6
ORDERING INFORMATION ..................................................................................6
PIN DESCRIPTION – 28 LEAD SSOP...................................................................7
PIN DESCRIPTION – 32 LEAD TQFP ...................................................................8
ABSOLUTE MAXIMUM RATINGS.........................................................................9
RECOMMENDED OPERATING CONDITIONS ...................................................10
ELECTRICAL CHARACTERISTICS ....................................................................10
TERMINOLOGY.......................................................................................................... 12
DIGITAL FILTER CHARACTERISTICS...............................................................13
DAC FILTER RESPONSES......................................................................................... 13
ADC FILTER RESPONSES......................................................................................... 14
ADC HIGH PASS FILTER ........................................................................................... 14
DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 14
WM8772EDS – 28 LEAD SSOP ..........................................................................16
MASTER CLOCK TIMING....................................................................................16
DIGITAL AUDIO INTERFACE – MASTER MODE....................................................... 16
MPU INTERFACE TIMING.......................................................................................... 19
DEVICE DESCRIPTION.......................................................................................20
INTRODUCTION......................................................................................................... 20
AUDIO DATA SAMPLING RATES............................................................................... 20
HARDWARE CONTROL MODES ............................................................................... 21
DIGITAL AUDIO INTERFACE..................................................................................... 23
POWERDOWN MODES ............................................................................................. 28
ZERO DETECT ........................................................................................................... 28
SOFTWARE CONTROL INTERFACE OPERATION................................................... 29
REGISTER MAP - 28 PIN SSOP ........................................................................30
CONTROL INTERFACE REGISTERS ........................................................................ 31
APPLICATIONS INFORMATION .........................................................................39
RECOMMENDED EXTERNAL COMPONENTS.......................................................... 39
SUGGESTED ANALOGUE LOW PASS POST DAC FILTERS................................... 40
PACKAGE DIMENSIONS ....................................................................................42
WM8722EFT - 32 LEAD TQFP ............................................................................43
MASTER CLOCK TIMING....................................................................................43
DIGITAL AUDIO INTERFACE – MASTER MODE....................................................... 43
MPU INTERFACE TIMING.......................................................................................... 46
PD Rev 4.2 October 2005
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
