wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 2

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8988
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DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION AND DEVICE MARKING..................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATION CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
POWER CONSUMPTION ....................................................................................10
SIGNAL TIMING REQUIREMENTS .....................................................................11
INTERNAL POWER ON RESET CIRCUIT ..........................................................15
DEVICE DESCRIPTION.......................................................................................16
REGISTER MAP...................................................................................................46
DIGITAL FILTER CHARACTERISTICS ...............................................................47
APPLICATIONS INFORMATION .........................................................................52
PACKAGE DIMENSIONS ....................................................................................55
IMPORTANT NOTICE ..........................................................................................56
SYSTEM CLOCK TIMING............................................................................................ 11
AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 11
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 12
INTRODUCTION.......................................................................................................... 16
INPUT SIGNAL PATH.................................................................................................. 16
AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 22
OUTPUT SIGNAL PATH.............................................................................................. 26
ANALOGUE OUTPUTS ............................................................................................... 31
ENABLING THE OUTPUTS ......................................................................................... 33
THERMAL SHUTDOWN .............................................................................................. 33
DIGITAL AUDIO INTERFACE...................................................................................... 34
AUDIO INTERFACE CONTROL .................................................................................. 37
CLOCKING AND SAMPLE RATES .............................................................................. 39
CONTROL INTERFACE .............................................................................................. 41
POWER SUPPLIES ..................................................................................................... 42
POWER MANAGEMENT ............................................................................................. 42
TERMINOLOGY........................................................................................................... 47
DAC FILTER RESPONSES ......................................................................................... 48
ADC FILTER RESPONSES ......................................................................................... 49
DE-EMPHASIS FILTER RESPONSES ........................................................................ 50
HIGHPASS FILTER ..................................................................................................... 51
RECOMMENDED EXTERNAL COMPONENTS........................................................... 52
LINE INPUT CONFIGURATION................................................................................... 53
HEADPHONE OUTPUT CONFIGURATION ................................................................ 53
LINE OUTPUT CONFIGURATION............................................................................... 53
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS ........................................ 54
POWER MANAGEMENT EXAMPLES ......................................................................... 54
ADDRESS.................................................................................................................... 56
TABLE OF CONTENTS
PD, Rev 4.0, October 2008
Production Data
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