WM8758B Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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WM8758B

Stereo CODEC with Headphone Driver and Line Out

Wolfson Microelectronics plc 

WM8758B

Production Data

TABLE OF CONTENTS

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

BLOCK DIAGRAM ................................................................................................ 1

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

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

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

PIN CONFIGURATION .......................................................................................... 4

ORDERING INFORMATION.................................................................................. 4

PIN DESCRIPTION................................................................................................ 5

RECOMMENDED OPERATING CONDITIONS..................................................... 6

ELECTRICAL CHARACTERISTICS ..................................................................... 7

TERMINOLOGY ............................................................................................................ 12

HEADPHONE OUTPUT PERFORMANCE.......................................................... 13

POWER CONSUMPTION .................................................................................... 14

AUDIO PATHS OVERVIEW ................................................................................ 15

SIGNAL TIMING REQUIREMENTS .................................................................... 16

SYSTEM CLOCK TIMING ............................................................................................. 16

AUDIO INTERFACE TIMING – MASTER MODE .......................................................... 16

AUDIO INTERFACE TIMING – SLAVE MODE ............................................................. 17

CONTROL INTERFACE TIMING – 3-WIRE MODE ...................................................... 18

CONTROL INTERFACE TIMING – 2-WIRE MODE ...................................................... 19

INTERNAL POWER ON RESET CIRCUIT .......................................................... 20

RECOMMENDED POWER UP/DOWN SEQUENCE .................................................... 22

DEVICE DESCRIPTION ...................................................................................... 25

INTRODUCTION ........................................................................................................... 25

INPUT SIGNAL PATH ................................................................................................... 26

ANALOGUE TO DIGITAL CONVERTER (ADC) ........................................................... 33

INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC)............................................ 37

OUTPUT SIGNAL PATH ............................................................................................... 42

3D STEREO ENHANCEMENT...................................................................................... 49

ANALOGUE OUTPUTS................................................................................................. 49

DIGITAL AUDIO INTERFACES..................................................................................... 61

AUDIO SAMPLE RATES ............................................................................................... 68

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ................................................ 68

GENERAL PURPOSE INPUT/OUTPUT........................................................................ 70

OUTPUT SWITCHING (JACK DETECT)....................................................................... 72

CONTROL INTERFACE ................................................................................................ 73

RESETTING THE CHIP ................................................................................................ 74

POWER SUPPLIES....................................................................................................... 75

POWER MANAGEMENT .............................................................................................. 75

POP MINIMISATION ..................................................................................................... 77

REGISTER MAP .................................................................................................. 78

DIGITAL FILTER CHARACTERISTICS .............................................................. 80

TERMINOLOGY ............................................................................................................ 80

DAC FILTER RESPONSES .......................................................................................... 81

ADC FILTER RESPONSES .......................................................................................... 81

HIGHPASS FILTER ....................................................................................................... 82

5-BAND EQUALISER .................................................................................................... 83

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PD, Rev 4.4, January 2012

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