WM8971L データシートの表示（PDF） - Wolfson Microelectronics plc
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WM8971L Datasheet PDF : 56 Pages
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WM8971L
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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 OPERATION CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
OUTPUT PGA’S LINEARITY ......................................................................................... 9
HEADPHONE OUTPUT THD VERSUS POWER......................................................... 10
SPEAKER OUTPUT THD VERSUS POWER .............................................................. 11
POWER CONSUMPTION ....................................................................................12
SIGNAL TIMING REQUIREMENTS .....................................................................13
SYSTEM CLOCK TIMING............................................................................................ 13
AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 13
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 14
DEVICE DESCRIPTION.......................................................................................17
INTRODUCTION.......................................................................................................... 17
INPUT SIGNAL PATH.................................................................................................. 17
AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 23
OUTPUT SIGNAL PATH.............................................................................................. 26
ANALOGUE OUTPUTS ............................................................................................... 31
ENABLING THE OUTPUTS ......................................................................................... 33
HEADPHONE SWITCH ............................................................................................... 33
THERMAL SHUTDOWN .............................................................................................. 35
HEADPHONE OUTPUT ............................................................................................... 35
DIGITAL AUDIO INTERFACE...................................................................................... 36
AUDIO INTERFACE CONTROL .................................................................................. 39
CLOCKING AND SAMPLE RATES .............................................................................. 40
CONTROL INTERFACE .............................................................................................. 42
POWER SUPPLIES ..................................................................................................... 43
POWER MANAGEMENT ............................................................................................. 44
REGISTER MAP...................................................................................................46
DIGITAL FILTER CHARACTERISTICS ...............................................................47
TERMINOLOGY........................................................................................................... 47
DAC FILTER RESPONSES ......................................................................................... 48
ADC FILTER RESPONSES ......................................................................................... 49
DE-EMPHASIS FILTER RESPONSES ........................................................................ 50
HIGHPASS FILTER ..................................................................................................... 51
w
AI Rev 3.0 March 2004
2
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