WM8974GEFLSLASHV datasheet(2/87 Pages) WOLFSON

2 / 87 page

WM8974

Production Data

PD Rev 4.2 March 2007

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 ............................................................................................................ 8

SIGNAL TIMING REQUIREMENTS .......................................................................9

SYSTEM CLOCK TIMING ............................................................................................. 9

AUDIO INTERFACE TIMING – MASTER MODE .......................................................... 9

AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 10

CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 11

CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 12

DEVICE DESCRIPTION .......................................................................................13

INTRODUCTION ......................................................................................................... 13

INPUT SIGNAL PATH ................................................................................................. 14

ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 19

INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 23

OUTPUT SIGNAL PATH ............................................................................................. 35

ANALOGUE OUTPUTS............................................................................................... 42

OUTPUT SWITCH ...................................................................................................... 47

DIGITAL AUDIO INTERFACES................................................................................... 49

AUDIO SAMPLE RATES............................................................................................. 54

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 55

GENERAL PURPOSE INPUT/OUTPUT...................................................................... 57

CONTROL INTERFACE.............................................................................................. 57

RESETTING THE CHIP........................................................................................58

POWER SUPPLIES .................................................................................................... 58

POWER MANAGEMENT ............................................................................................ 63

DIGITAL FILTER CHARACTERISTICS ...............................................................77

TERMINOLOGY .......................................................................................................... 77

DAC FILTER RESPONSES......................................................................................... 78

ADC FILTER RESPONSES......................................................................................... 78

DE-EMPHASIS FILTER RESPONSES........................................................................ 79

HIGHPASS FILTER..................................................................................................... 80

5-BAND EQUALISER .................................................................................................. 81

APPLICATIONS INFORMATION .........................................................................85

RECOMMENDED EXTERNAL COMPONENTS.......................................................... 85

PACKAGE DIAGRAM ..........................................................................................86

IMPORTANT NOTICE ..........................................................................................87

ADDRESS: .................................................................................................................. 87

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