WM8950 datasheet(2/60 Pages) CIRRUS

2 / 60 page

WM8950

Rev 4.5

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 ............................................................................................................... 7

SIGNAL TIMING REQUIREMENTS ...................................................................... 8

SYSTEM CLOCK TIMING................................................................................................ 8

AUDIO INTERFACE TIMING

– MASTER MODE ............................................................ 8

AUDIO INTERFACE TIMING

– SLAVE MODE................................................................ 9

CONTROL INTERFACE TIMING

– 3-WIRE MODE....................................................... 10

CONTROL INTERFACE TIMING

– 2-WIRE MODE....................................................... 11

DEVICE DESCRIPTION ...................................................................................... 12

INTRODUCTION ............................................................................................................ 12

INPUT SIGNAL PATH .................................................................................................... 13

ANALOGUE TO DIGITAL CONVERTER (ADC) ............................................................ 18

INPUT AUTOMATIC LEVEL CONTROL (ALC) ............................................................. 22

DIGITAL AUDIO INTERFACES ..................................................................................... 36

AUDIO SAMPLE RATES................................................................................................ 41

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ................................................. 42

GENERAL PURPOSE INPUT/OUTPUT ........................................................................ 44

CONTROL INTERFACE................................................................................................. 44

RESETTING THE CHIP ................................................................................................. 45

POWER SUPPLIES ....................................................................................................... 46

ADC POWER UP/DOWN SEQUENCE.......................................................................... 46

POWER MANAGEMENT ............................................................................................... 47

DIGITAL FILTER CHARACTERISTICS .............................................................. 50

TERMINOLOGY ............................................................................................................. 50

ADC FILTER RESPONSES ........................................................................................... 50

DE-EMPHASIS FILTER RESPONSES .......................................................................... 51

HIGH-PASS FILTER ...................................................................................................... 52

5-BAND EQUALISER..................................................................................................... 53

APPLICATIONS INFORMATION ........................................................................ 57

RECOMMENDED EXTERNAL COMPONENTS ............................................................ 57

PACKAGE DIAGRAM ......................................................................................... 58

IMPORTANT NOTICE ......................................................................................... 59

REVISION HISTORY ........................................................................................... 60

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