WM8973 Wolfson Microelectronics Ltd., WM8973 Datasheet - Page 2

• Manufacturer Part Number: WM8973
• Description: The WM8976 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
• Manufacturer: Wolfson Microelectronics Ltd.

WM8973L
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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 OPERATION CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
POWER CONSUMPTION ....................................................................................12
SIGNAL TIMING REQUIREMENTS .....................................................................13
INTERNAL POWER ON RESET CIRCUIT ..........................................................17
DEVICE DESCRIPTION.......................................................................................18
REGISTER MAP...................................................................................................51
DIGITAL FILTER CHARACTERISTICS ...............................................................52
APPLICATIONS INFORMATION .........................................................................57
OUTPUT PGA’S LINEARITY ......................................................................................... 9
HEADPHONE OUTPUT THD VERSUS POWER......................................................... 10
SPEAKER THD AND NOISE VERSUS POWER ......................................................... 11
SYSTEM CLOCK TIMING............................................................................................ 13
AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 13
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 14
INTRODUCTION.......................................................................................................... 18
INPUT SIGNAL PATH.................................................................................................. 18
AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 25
OUTPUT SIGNAL PATH.............................................................................................. 29
ANALOGUE OUTPUTS ............................................................................................... 34
ENABLING THE OUTPUTS ......................................................................................... 36
HEADPHONE SWITCH ............................................................................................... 36
THERMAL SHUTDOWN .............................................................................................. 38
HEADPHONE OUTPUT ............................................................................................... 38
DIGITAL AUDIO INTERFACE...................................................................................... 39
AUDIO INTERFACE CONTROL .................................................................................. 43
CLOCKING AND SAMPLE RATES .............................................................................. 45
CONTROL INTERFACE .............................................................................................. 47
POWER SUPPLIES ..................................................................................................... 48
POWER MANAGEMENT ............................................................................................. 48
TERMINOLOGY........................................................................................................... 52
DAC FILTER RESPONSES ......................................................................................... 53
ADC FILTER RESPONSES ......................................................................................... 54
DE-EMPHASIS FILTER RESPONSES ........................................................................ 55
HIGHPASS FILTER ..................................................................................................... 56
RECOMMENDED EXTERNAL COMPONENTS........................................................... 57
LINE INPUT CONFIGURATION................................................................................... 58
MICROPHONE INPUT CONFIGURATION .................................................................. 58
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS ........................................ 58
POWER MANAGEMENT EXAMPLES ......................................................................... 59
TABLE OF CONTENTS
PD Rev 4.2 September 2005
Production Data
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