wm8961 Wolfson Microelectronics plc, wm8961 Datasheet - Page 3

• Manufacturer Part Number: wm8961
• Description: Ultra-low Power Stereo Codec With 1w Stereo Class D Speaker Drivers And Ground Referenced Headphone Drivers
• Manufacturer: Wolfson Microelectronics plc

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WM8961
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
SIGNAL TIMING REQUIREMENTS ..................................................................... 14
DEVICE DESCRIPTION ....................................................................................... 19
REGISTER MAP .................................................................................................. 81
DIGITAL FILTER CHARACTERISTICS ............................................................. 101
APPLICATIONS INFORMATION ....................................................................... 107
COMMON TEST CONDITIONS ................................................................................... 12
MEASUREMENTS ...................................................................................................... 12
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
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 BITS BY ADDRESS .................................................................................. 83
DAC FILTER RESPONSES ....................................................................................... 102
ADC FILTER RESPONSES ....................................................................................... 104
DE-EMPHASIS FILTER RESPONSES ...................................................................... 106
RECOMMENDED EXTERNAL COMPONENTS ........................................................ 107
SPEAKER SELECTION............................................................................................. 108
PCB LAYOUT CONSIDERATIONS ........................................................................... 109
EXAMPLE CONFIGURATIONS ................................................................................. 110
TABLE OF CONTENTS
PP, August 2009, Rev 3.1
Pre-Production
3