WM8941GEFLSLASHV datasheet(3/96 Pages) WOLFSON

3 / 96 page

Pre Production

WM8941

PP, Rev 3.3, December 2007

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM ..........................................................................................................2

PIN CONFIGURATION....................................................................................................5

ORDERING INFORMATION ...........................................................................................5

PIN DESCRIPTION .........................................................................................................6

ABSOLUTE MAXIMUM RATINGS..................................................................................7

RECOMMENDED OPERATING CONDITIONS ..............................................................7

ELECTRICAL CHARACTERISTICS ...............................................................................8

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

AUDIO PATHS OVERVIEW ..........................................................................................12

SIGNAL TIMING REQUIREMENTS ..............................................................................14

SYSTEM CLOCK TIMING .....................................................................................................14

AUDIO INTERFACE TIMING – MASTER MODE ..................................................................14

AUDIO INTERFACE TIMING – SLAVE MODE......................................................................15

CONTROL INTERFACE TIMING – 3-WIRE MODE ..............................................................16

CONTROL INTERFACE TIMING – 2-WIRE MODE ..............................................................17

DEVICE DESCRIPTION................................................................................................18

INTRODUCTION ...................................................................................................................18

INPUT SIGNAL PATH ...........................................................................................................19

ANALOGUE TO DIGITAL CONVERTER (ADC)....................................................................25

INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ....................................................30

OUTPUT SIGNAL PATH .......................................................................................................43

VOLUME BOOST..................................................................................................................45

ANALOGUE OUTPUTS.........................................................................................................47

OUTPUT SWITCH ................................................................................................................50

VIDEO BUFFER ....................................................................................................................53

DIGITAL AUDIO INTERFACES.............................................................................................58

AUDIO SAMPLE RATES.......................................................................................................62

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) .........................................................63

COMPANDING......................................................................................................................66

GENERAL PURPOSE INPUT/OUTPUT................................................................................68

CONTROL INTERFACE........................................................................................................68

3-WIRE SERIAL CONTROL MODE ......................................................................................70

READBACK IN 3-WIRE MODE .............................................................................................70

2-WIRE SERIAL CONTROL MODE ......................................................................................71

RESETTING THE CHIP ........................................................................................................71

POWER SUPPLIES ..............................................................................................................71

POWER MANAGEMENT ......................................................................................................74

POP MINIMISATION .............................................................................................................75

REGISTER MAP............................................................................................................76

DIGITAL FILTER CHARACTERISTICS ........................................................................89

TERMINOLOGY ....................................................................................................................89

DAC FILTER RESPONSES...................................................................................................90

ADC FILTER RESPONSES...................................................................................................90

HIGHPASS FILTER...............................................................................................................91

NOTCH FILTERS AND LOW PASS FILTER.........................................................................92

WM8941GEFL/V Datasheet(PDF) 3 Page - Wolfson Microelectronics plc

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