WM9090
Production Data
w
PD, November 2010, Rev 4.1
2
TABLE OF CONTENTS
DESCRIPTION ....................................................................................................... 1
FEATURES............................................................................................................. 1
APPLICATIONS ..................................................................................................... 1
BLOCK DIAGRAM ................................................................................................. 1
TABLE OF CONTENTS ......................................................................................... 2
PIN CONFIGURATION ........................................................................................... 4
ORDERING INFORMATION .................................................................................. 4
PIN DESCRIPTION ................................................................................................ 5
ABSOLUTE MAXIMUM RATINGS ......................................................................... 6
RECOMMENDED OPERATING CONDITIONS ..................................................... 6
ELECTRICAL CHARACTERISTICS ...................................................................... 7
TERMINOLOGY ............................................................................................................. 9
PERFORMANCE PLOTS ............................................................................................. 10
TYPICAL PERFORMANCE .................................................................................. 11
POWER CONSUMPTION ............................................................................................ 11
AUDIO SIGNAL PATHS DIAGRAM ..................................................................... 12
CONTROL INTERFACE TIMING ......................................................................... 13
DEVICE DESCRIPTION ....................................................................................... 14
INTRODUCTION .......................................................................................................... 14
INPUT SIGNAL PATH .................................................................................................. 15
LINE INPUTS ............................................................................................................................................ 16
INPUT PGA ENABLE ................................................................................................................................ 16
INPUT PGA CONFIGURATION ................................................................................................................ 17
INPUT PGA VOLUME CONTROL ............................................................................................................. 17
OUTPUT SIGNAL PATH .............................................................................................. 20
OUTPUT SIGNAL PATHS ENABLE .......................................................................................................... 20
SPEAKER MIXER CONTROL ................................................................................................................... 21
SPEAKER OUTPUT VOLUME CONTROL ................................................................................................ 22
SPEAKER BOOST MIXER CONTROL ...................................................................................................... 22
HEADPHONE MIXER CONTROL ............................................................................................................. 23
HEADPHONE OUTPUT VOLUME CONTROL .......................................................................................... 24
AUTOMATIC GAIN CONTROL (AGC) ......................................................................... 27
AGC CONTROL ........................................................................................................................................ 27
AGC ANTI-CLIP ........................................................................................................................................ 27
AGC POWER LIMITING ............................................................................................................................ 29
ANALOGUE OUTPUTS ............................................................................................... 31
SPEAKER OUTPUT CONFIGURATIONS ................................................................................................. 31
HEADPHONE OUTPUT CONFIGURATIONS ........................................................................................... 32
CLOCKING CONTROL ................................................................................................ 32
CONTROL INTERFACE .............................................................................................. 34
CONTROL WRITE SEQUENCER ................................................................................ 37
INITIATING A SEQUENCE ....................................................................................................................... 37
PROGRAMMING A SEQUENCE .............................................................................................................. 38
DEFAULT SEQUENCES ........................................................................................................................... 40
POWER SEQUENCES AND POP SUPPRESSION CONTROL .................................. 43
INPUT VMID CLAMPS .............................................................................................................................. 43
HEADPHONE ENABLE/DISABLE ............................................................................................................. 43
RECOMMENDED HEADPHONE START UP SEQUENCE ....................................................................... 45
