Production Data
WM8903
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
INPUT SIGNAL PATH.................................................................................................... 10
OUTPUT SIGNAL PATH................................................................................................ 12
BYPASS PATH .............................................................................................................. 14
CHARGE PUMP............................................................................................................. 15
FLL ................................................................................................................................. 15
OTHER PARAMETERS ................................................................................................. 15
POWER CONSUMPTION.................................................................................... 17
COMMON TEST CONDITIONS..................................................................................... 17
POWER CONSUMPTION MEASUREMENTS............................................................... 17
SIGNAL TIMING REQUIREMENTS .................................................................... 19
COMMON TEST CONDITIONS..................................................................................... 19
MASTER CLOCK........................................................................................................... 19
AUDIO INTERFACE TIMING ......................................................................................... 20
MASTER MODE .............................................................................................................................................................. 20
SLAVE MODE.................................................................................................................................................................. 21
TDM MODE ..................................................................................................................................................................... 22
CONTROL INTERFACE TIMING................................................................................... 23
DIGITAL FILTER CHARACTERISTICS .............................................................. 24
DAC FILTER RESPONSES ........................................................................................... 25
ADC FILTER RESPONSES ........................................................................................... 26
ADC HIGH PASS FILTER RESPONSES....................................................................... 27
DE-EMPHASIS FILTER RESPONSES.......................................................................... 28
DEVICE DESCRIPTION ...................................................................................... 29
INTRODUCTION............................................................................................................ 29
ANALOGUE INPUT SIGNAL PATH............................................................................... 30
INPUT PGA ENABLE ...................................................................................................................................................... 31
INPUT PGA CONFIGURATION ...................................................................................................................................... 31
SINGLE-ENDED INPUT .................................................................................................................................................. 33
DIFFERENTIAL LINE INPUT........................................................................................................................................... 33
DIFFERENTIAL MICROPHONE INPUT.......................................................................................................................... 34
INPUT PGA GAIN CONTROL ......................................................................................................................................... 34
INPUT PGA COMMON MODE AMPLIFIER.................................................................................................................... 36
ELECTRET CONDENSER MICROPHONE INTERFACE.............................................. 37
MICBIAS CURRENT DETECT ........................................................................................................................................ 37
MICBIAS CURRENT DETECT FILTERING .................................................................................................................... 38
PD, Rev 4.5, June 2012
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
