wm9090 Wolfson Microelectronics plc, wm9090 Datasheet - Page 2

• Manufacturer Part Number: wm9090
• Description: Ultra Low Power Audio Subsystem
• Manufacturer: Wolfson Microelectronics plc

WM9090
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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
THERMAL PERFORMANCE ................................................................................. 7
ELECTRICAL CHARACTERISTICS ...................................................................... 8
AUDIO SIGNAL PATHS DIAGRAM ..................................................................... 11
CONTROL INTERFACE TIMING ......................................................................... 12
DEVICE DESCRIPTION ....................................................................................... 13
TERMINOLOGY ........................................................................................................... 10
INTRODUCTION .......................................................................................................... 13
INPUT SIGNAL PATH .................................................................................................. 14
OUTPUT SIGNAL PATH .............................................................................................. 19
AUTOMATIC GAIN CONTROL (AGC) ......................................................................... 25
ANALOGUE OUTPUTS ............................................................................................... 29
CLOCKING CONTROL ................................................................................................ 30
CONTROL INTERFACE .............................................................................................. 32
CONTROL WRITE SEQUENCER ................................................................................ 35
POWER SEQUENCES AND POP SUPPRESSION CONTROL .................................. 41
CHARGE PUMP ........................................................................................................... 44
DC SERVO .................................................................................................................. 45
LINE INPUTS ............................................................................................................................................ 15
INPUT PGA ENABLE ................................................................................................................................ 15
INPUT PGA CONFIGURATION ................................................................................................................ 16
INPUT PGA VOLUME CONTROL ............................................................................................................. 16
OUTPUT SIGNAL PATHS ENABLE .......................................................................................................... 19
SPEAKER MIXER CONTROL ................................................................................................................... 20
SPEAKER OUTPUT VOLUME CONTROL ................................................................................................ 21
SPEAKER BOOST MIXER CONTROL ...................................................................................................... 21
HEADPHONE MIXER CONTROL ............................................................................................................. 22
HEADPHONE OUTPUT VOLUME CONTROL .......................................................................................... 23
AGC CONTROL ........................................................................................................................................ 25
AGC ANTI-CLIP ........................................................................................................................................ 25
AGC POWER LIMITING ............................................................................................................................ 27
SPEAKER OUTPUT CONFIGURATIONS ................................................................................................. 29
HEADPHONE OUTPUT CONFIGURATIONS ........................................................................................... 30
INITIATING A SEQUENCE ....................................................................................................................... 35
PROGRAMMING A SEQUENCE .............................................................................................................. 36
DEFAULT SEQUENCES ........................................................................................................................... 38
INPUT VMID CLAMPS .............................................................................................................................. 41
HEADPHONE ENABLE/DISABLE ............................................................................................................. 41
DC SERVO ENABLE AND START-UP ..................................................................................................... 45
DC SERVO ACTIVE MODES .................................................................................................................... 47
TABLE OF CONTENTS
PP, January 2010, Rev 3.0
Pre-Production
2