WM8980_07 datasheet(2/112 Pages) WOLFSON

2 / 112 page

WM8980

Pre-Production

PP Rev 3.1 March 2007

TABLE OF CONTENTS

DESCRIPTION .......................................................................................................1

BLOCK DIAGRAM .................................................................................................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

TERMINOLOGY .......................................................................................................... 10

SPEAKER OUTPUT THD VERSUS POWER ......................................................11

POWER CONSUMPTION ....................................................................................12

ESTIMATING SUPPLY CURRENT ............................................................................. 12

AUDIO PATHS OVERVIEW .................................................................................14

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

INTERNAL POWER ON RESET CIRCUIT ..........................................................19

RECOMMENDED POWER UP/DOWN SEQUENCE .................................................. 21

DEVICE DESCRIPTION .......................................................................................25

INTRODUCTION ......................................................................................................... 25

INPUT SIGNAL PATH ................................................................................................. 27

ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 35

INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 38

OUTPUT SIGNAL PATH ............................................................................................. 42

3D STEREO ENHANCEMENT .................................................................................... 49

ANALOGUE OUTPUTS............................................................................................... 49

VIDEO BUFFER .......................................................................................................... 65

DIGITAL AUDIO INTERFACES................................................................................... 69

AUDIO SAMPLE RATES............................................................................................. 76

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 76

GENERAL PURPOSE INPUT/OUTPUT...................................................................... 78

OUTPUT SWITCHING (JACK DETECT)..................................................................... 79

CONTROL INTERFACE.............................................................................................. 81

RESETTING THE CHIP .............................................................................................. 82

POWER SUPPLIES .................................................................................................... 82

POWER MANAGEMENT ............................................................................................ 83

DIGITAL FILTER CHARACTERISTICS .............................................................103

TERMINOLOGY ........................................................................................................ 103

DAC FILTER RESPONSES....................................................................................... 104

ADC FILTER RESPONSES....................................................................................... 104

HIGHPASS FILTER................................................................................................... 105

5-BAND EQUALISER ................................................................................................ 106

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