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WM8750BL Datasheet(PDF) 2 Page - Wolfson Microelectronics plc

Part No. WM8750BL
Description  Stereo CODEC for Portable Audio Applications
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Maker  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
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WM8750BL Datasheet(HTML) 2 Page - Wolfson Microelectronics plc

 
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WM8750BL
Pre-Production
w
Pre-Production Rev 3.3 January 2007
2
TABLE OF CONTENTS
DESCRIPTION ................................................................................................................. 1
FEATURES ...................................................................................................................... 1
APPLICATIONS ............................................................................................................... 1
BLOCK DIAGRAM ........................................................................................................... 1
TABLE OF CONTENTS ................................................................................................... 2
PIN CONFIGURATION..................................................................................................... 3
ORDERING INFORMATION ............................................................................................ 3
PIN DESCRIPTION .......................................................................................................... 4
ABSOLUTE MAXIMUM RATINGS ................................................................................... 5
RECOMMENDED OPERATION CONDITIONS ................................................................ 5
ELECTRICAL CHARACTERISTICS................................................................................. 6
TYPICAL PERFORMANCE.............................................................................................. 8
POWER CONSUMPTION ...............................................................................................................8
OUTPUT DRIVERS ......................................................................................................................... 9
OUTPUT PGA’S LINEARITY......................................................................................................... 10
SIGNAL TIMING REQUIREMENTS ............................................................................... 11
SYSTEM CLOCK TIMING .............................................................................................................11
AUDIO INTERFACE TIMING – MASTER MODE ......................................................................... 11
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................................. 12
INTERNAL POWER ON RESET CIRCUIT ..................................................................... 15
DEVICE DESCRIPTION ................................................................................................. 16
INTRODUCTION ........................................................................................................................... 16
INPUT SIGNAL PATH ................................................................................................................... 16
AUTOMATIC LEVEL CONTROL (ALC) ........................................................................................ 23
OUTPUT SIGNAL PATH ............................................................................................................... 27
ANALOGUE OUTPUTS................................................................................................................. 32
ENABLING THE OUTPUTS .......................................................................................................... 34
HEADPHONE SWITCH................................................................................................................. 34
THERMAL SHUTDOWN ............................................................................................................... 35
HEADPHONE OUTPUT ................................................................................................................36
DIGITAL AUDIO INTERFACE ....................................................................................................... 37
AUDIO INTERFACE CONTROL ................................................................................................... 41
CLOCKING AND SAMPLE RATES............................................................................................... 43
CONTROL INTERFACE................................................................................................................ 45
POWER SUPPLIES....................................................................................................................... 46
POWER MANAGEMENT .............................................................................................................. 46
REGISTER MAP............................................................................................................. 49
DIGITAL FILTER CHARACTERISTICS.......................................................................... 50
TERMINOLOGY ............................................................................................................................ 50
DAC FILTER RESPONSES .......................................................................................................... 51
ADC FILTER RESPONSES .......................................................................................................... 52
DE-EMPHASIS FILTER RESPONSES ......................................................................................... 53
HIGHPASS FILTER....................................................................................................................... 54
APPLICATIONS INFORMATION ................................................................................... 55
RECOMMENDED EXTERNAL COMPONENTS........................................................................... 55
LINE INPUT CONFIGURATION.................................................................................................... 56
MICROPHONE INPUT CONFIGURATION................................................................................... 56
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS ........................................................ 56
POWER MANAGEMENT EXAMPLES.......................................................................................... 57
IMPORTANT NOTICE .................................................................................................... 59
ADDRESS...................................................................................................................................... 59


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