WM8750JL
Production Data
TABLE OF CONTENTS
DESCRIPTION ...................................................................................................................1
FEATURES......................................................................................................................... 1
APPLICATIONS .................................................................................................................1
BLOCK DIAGRAM ............................................................................................................. 1
TABLE OF CONTENTS ..................................................................................................... 2
PIN CONFIGURATION....................................................................................................... 3
ORDERING INFORMATION .............................................................................................. 3
PIN DESCRIPTION ............................................................................................................ 4
ABSOLUTE MAXIMUM RATINGS..................................................................................... 5
RECOMMENDED OPERATION CONDITIONS ................................................................. 5
ELECTRICAL CHARACTERISTICS.................................................................................. 6
TYPICAL PERFORMANCE................................................................................................ 8
POWER CONSUMPTION............................................................................................................... 8
OUTPUT DRIVERS ........................................................................................................................ 9
OUTPUT PGA’S LINEARITY........................................................................................................ 10
SIGNAL TIMING REQUIREMENTS................................................................................. 11
SYSTEM CLOCK TIMING ............................................................................................................ 11
AUDIO INTERFACE TIMING – MASTER MODE......................................................................... 11
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................................ 12
CONTROL INTERFACE TIMING – 3-WIRE MODE..................................................................... 13
CONTROL INTERFACE TIMING – 2-WIRE MODE..................................................................... 14
INTERNAL POWER ON RESET CIRCUIT ...................................................................... 15
DEVICE DESCRIPTION ................................................................................................... 16
INTRODUCTION........................................................................................................................... 16
INPUT SIGNAL PATH................................................................................................................... 16
AUTOMATIC LEVEL CONTROL (ALC)........................................................................................ 23
OUTPUT SIGNAL PATH............................................................................................................... 27
ANALOGUE OUTPUTS................................................................................................................ 32
ENABLING THE OUTPUTS.......................................................................................................... 34
HEADPHONE SWITCH ................................................................................................................ 34
THERMAL SHUTDOWN............................................................................................................... 36
HEADPHONE OUTPUT................................................................................................................ 36
DIGITAL AUDIO INTERFACE ...................................................................................................... 37
AUDIO INTERFACE CONTROL................................................................................................... 42
CLOCKING AND SAMPLE RATES.............................................................................................. 44
CONTROL INTERFACE ............................................................................................................... 46
POWER SUPPLIES...................................................................................................................... 47
POWER MANAGEMENT.............................................................................................................. 47
REGISTER MAP............................................................................................................... 50
DIGITAL FILTER CHARACTERISTICS........................................................................... 51
TERMINOLOGY............................................................................................................................ 51
DAC FILTER RESPONSES.......................................................................................................... 52
ADC FILTER RESPONSES.......................................................................................................... 53
DE-EMPHASIS FILTER RESPONSES ........................................................................................ 54
HIGHPASS FILTER ...................................................................................................................... 55
APPLICATIONS INFORMATION..................................................................................... 56
RECOMMENDED EXTERNAL COMPONENTS.......................................................................... 56
LINE INPUT CONFIGURATION................................................................................................... 57
MICROPHONE INPUT CONFIGURATION .................................................................................. 57
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS........................................................ 57
POWER MANAGEMENT EXAMPLES ......................................................................................... 58
IMPORTANT NOTICE ...................................................................................................... 60
ADDRESS..................................................................................................................................... 60
REVISION HISTORY........................................................................................................ 61
PD, April 2012, Rev 4.1
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
