WM8976 Wolfson Microelectronics Ltd., WM8976 Datasheet - Page 2

• Manufacturer Part Number: WM8976
• 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.

WM8976
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................4
ORDERING INFORMATION ..................................................................................4
PIN DESCRIPTION ................................................................................................5
ABSOLUTE MAXIMUM RATINGS.........................................................................6
RECOMMENDED OPERATING CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
SPEAKER OUTPUT THD VERSUS POWER ......................................................11
POWER CONSUMPTION ....................................................................................12
AUDIO PATHS OVERVIEW .................................................................................14
SIGNAL TIMING REQUIREMENTS .....................................................................15
DEVICE DESCRIPTION.......................................................................................19
REGISTER MAP...................................................................................................82
REGISTER BITS BY ADDRESS ..........................................................................84
DIGITAL FILTER CHARACTERISTICS ...............................................................99
APPLICATION INFORMATION..........................................................................106
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TERMINOLOGY .......................................................................................................... 10
SYSTEM CLOCK TIMING ........................................................................................... 15
AUDIO INTERFACE TIMING – MASTER MODE ........................................................ 15
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 16
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 17
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 18
INTRODUCTION ......................................................................................................... 19
INPUT SIGNAL PATH ................................................................................................. 21
ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 25
INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 29
OUTPUT SIGNAL PATH ............................................................................................. 41
3D STEREO ENHANCEMENT .................................................................................... 48
ANALOGUE OUTPUTS............................................................................................... 48
DIGITAL AUDIO INTERFACES................................................................................... 63
AUDIO SAMPLE RATES ............................................................................................. 68
MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 68
COMPANDING............................................................................................................ 70
GENERAL PURPOSE INPUT/OUTPUT...................................................................... 72
OUTPUT SWITCHING (JACK DETECT)..................................................................... 73
CONTROL INTERFACE.............................................................................................. 74
RESETTING THE CHIP .............................................................................................. 75
POWER SUPPLIES .................................................................................................... 76
RECOMMENDED POWER UP/DOWN SEQUENCE .................................................. 77
POWER MANAGEMENT ............................................................................................ 81
TERMINOLOGY .......................................................................................................... 99
DAC FILTER RESPONSES....................................................................................... 100
ADC FILTER RESPONSES....................................................................................... 100
HIGHPASS FILTER................................................................................................... 101
5-BAND EQUALISER ................................................................................................ 102
RECOMMENDED EXTERNAL COMPONENTS ........................................................ 106
TABLE OF CONTENTS
PP Rev 3.0 April 2006
Pre-Production
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