WM8978GEFLSLASHV datasheet(2/78 Pages) WOLFSON

2 / 78 page

WM8978

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PP Rev 1.7 January 2005

TABLE OF CONTENTS

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

FEATURES.............................................................................................................1

APPLICATIONS .....................................................................................................1

TABLE OF CONTENTS .........................................................................................2

PIN CONFIGURATION...........................................................................................3

ORDERING INFORMATION ..................................................................................3

PIN DESCRIPTION ................................................................................................4

ABSOLUTE MAXIMUM RATINGS .........................................................................5

RECOMMENDED OPERATING CONDITIONS .....................................................5

ELECTRICAL CHARACTERISTICS ......................................................................6

TERMINOLOGY ............................................................................................................ 9

POWER CONSUMPTION ....................................................................................10

SIGNAL TIMING REQUIREMENTS .....................................................................11

SYSTEM CLOCK TIMING ........................................................................................... 11

AUDIO INTERFACE TIMING – MASTER MODE ........................................................ 11

AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 12

CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 13

CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 14

DEVICE DESCRIPTION .......................................................................................15

INTRODUCTION ......................................................................................................... 15

INPUT SIGNAL PATH ................................................................................................. 17

ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 23

INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 27

OUTPUT SIGNAL PATH ............................................................................................. 31

3D STEREO ENHANCEMENT .................................................................................... 37

ANALOGUE OUTPUTS............................................................................................... 38

DIGITAL AUDIO INTERFACES................................................................................... 52

AUDIO SAMPLE RATES ............................................................................................. 59

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 59

GENERAL PURPOSE INPUT/OUTPUT...................................................................... 61

OUTPUT SWITCHING (JACK DETECT)..................................................................... 62

CONTROL INTERFACE.............................................................................................. 63

RESETTING THE CHIP .............................................................................................. 64

POWER SUPPLIES .................................................................................................... 64

POWER MANAGEMENT ............................................................................................ 65

DIGITAL FILTER CHARACTERISTICS ...............................................................69

TERMINOLOGY .......................................................................................................... 69

DAC FILTER RESPONSES......................................................................................... 70

ADC FILTER RESPONSES......................................................................................... 70

HIGHPASS FILTER..................................................................................................... 71

5-BAND EQUALISER .................................................................................................. 72

APPLICATIONS INFORMATION .........................................................................76

RECOMMENDED EXTERNAL COMPONENTS .......................................................... 76

PACKAGE DIAGRAM ..........................................................................................77

IMPORTANT NOTICE ..........................................................................................78

ADDRESS: .................................................................................................................. 78

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