Production Data
WM8912
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................2
TABLE OF CONTENTS .........................................................................................3
PIN CONFIGURATION...........................................................................................6
ORDERING INFORMATION ..................................................................................6
PIN DESCRIPTION ................................................................................................7
ABSOLUTE MAXIMUM RATINGS.........................................................................8
RECOMMENDED OPERATING CONDITIONS .....................................................8
ELECTRICAL CHARACTERISTICS ......................................................................9
TERMINOLOGY............................................................................................................ 9
COMMON TEST CONDITIONS .................................................................................... 9
OUTPUT SIGNAL PATH............................................................................................. 10
CHARGE PUMP.......................................................................................................... 11
FLL.............................................................................................................................. 11
OTHER PARAMETERS .............................................................................................. 11
POWER CONSUMPTION ....................................................................................12
COMMON TEST CONDITIONS .................................................................................. 12
POWER CONSUMPTION MEASUREMENTS ............................................................ 13
SIGNAL TIMING REQUIREMENTS.....................................................................14
COMMON TEST CONDITIONS .................................................................................. 14
MASTER CLOCK ........................................................................................................ 14
AUDIO INTERFACE TIMING ...................................................................................... 15
MASTER MODE ........................................................................................................................................................15
SLAVE MODE ...........................................................................................................................................................16
CONTROL INTERFACE TIMING ................................................................................ 17
DIGITAL FILTER CHARACTERISTICS...............................................................18
DAC FILTER RESPONSES......................................................................................... 19
DE-EMPHASIS FILTER RESPONSES........................................................................ 20
DEVICE DESCRIPTION.......................................................................................21
INTRODUCTION......................................................................................................... 21
DYNAMIC RANGE CONTROL (DRC)......................................................................... 22
COMPRESSION/LIMITING CAPABILITIES...............................................................................................................22
GAIN LIMITS .............................................................................................................................................................24
DYNAMIC CHARACTERISTICS................................................................................................................................24
ANTI-CLIP CONTROL ...............................................................................................................................................25
QUICK RELEASE CONTROL....................................................................................................................................26
GAIN SMOOTHING...................................................................................................................................................26
INITIALISATION ........................................................................................................................................................27
RETUNETM MOBILE PARAMETRIC EQUALIZER (EQ) .............................................. 28
DEFAULT MODE (5-BAND PARAMETRIC EQ) ........................................................................................................28
RETUNETM MOBILE MODE.......................................................................................................................................29
EQ FILTER CHARACTERISTICS..............................................................................................................................29
DIGITAL MIXING......................................................................................................... 31
DAC INTERFACE ROUTING AND CONTROL ..........................................................................................................31
DAC INTERFACE VOLUME BOOST.........................................................................................................................31
PD, Rev 4.0, September 2010
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
