WM8961 Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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WM8961

Ultra-Low Power Stereo CODEC with 1W Stereo Class D Speaker Drivers and Ground Referenced Headphone Drivers

Wolfson Microelectronics plc 

WM8961

Pre-Production

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

COMMON TEST CONDITIONS................................................................................... 12

MEASUREMENTS ...................................................................................................... 12

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

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

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

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

CONTROL INTERFACE TIMING................................................................................. 16

INTERNAL POWER ON RESET CIRCUIT .................................................................. 17

DEVICE DESCRIPTION .......................................................................................19

INTRODUCTION ......................................................................................................... 19

CONTROL INTERFACE .............................................................................................. 20

INPUT SIGNAL PATH ................................................................................................. 22

ANALOGUE TO DIGITAL CONVERTER (ADC) .......................................................... 26

AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 31

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

ANALOGUE OUTPUTS............................................................................................... 41

HEADPHONE PLAYBACK MODES ............................................................................ 46

INPUT AND OUTPUT VOLUME UPDATES ................................................................ 51

DC SERVO.................................................................................................................. 53

CHARGE PUMP .......................................................................................................... 56

DIGITAL AUDIO INTERFACE ..................................................................................... 58

CONTROL WRITE SEQUENCER ............................................................................... 65

CLOCKING AND SAMPLE RATES ............................................................................. 71

VMID GENERATOR .................................................................................................... 78

THERMAL SHUTDOWN AND STATUS ...................................................................... 79

CHIP DEVICE ID ......................................................................................................... 80

CHIP SOFTWARE RESET .......................................................................................... 80

REGISTER MAP ..................................................................................................81

REGISTER BITS BY ADDRESS.................................................................................. 83

DIGITAL FILTER CHARACTERISTICS.............................................................101

DAC FILTER RESPONSES....................................................................................... 102

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

DE-EMPHASIS FILTER RESPONSES...................................................................... 106

APPLICATIONS INFORMATION .......................................................................107

RECOMMENDED EXTERNAL COMPONENTS ........................................................ 107

SPEAKER SELECTION............................................................................................. 108

PCB LAYOUT CONSIDERATIONS ........................................................................... 109

EXAMPLE CONFIGURATIONS................................................................................. 110

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PP, August 2009, Rev 3.1

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