Audio Subsystem. WM9094 Datasheet

WM9094 Subsystem. Datasheet pdf. Equivalent

WM9094 Datasheet
Recommendation WM9094 Datasheet
Part WM9094
Description Ultra Low Power Audio Subsystem
Feature WM9094; w WM9094 Ultra Low Power Audio Subsystem DESCRIPTION The WM9094[1] is a high performance low powe.
Manufacture Wolfson Microelectronics
Datasheet
Download WM9094 Datasheet




Wolfson Microelectronics WM9094
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WM9094
Ultra Low Power Audio Subsystem
DESCRIPTION
The WM9094[1] is a high performance low power audio
subsystem, including headphone driver and Class AB/D
earpiece/speaker driver. The Class D speaker driver
supports 650mW output power at 3.6V, 1%THD.
The unique dual mode charge pump architecture provides
ground referenced headphone outputs removing the
requirement for external coupling capacitors. Class G
technology is integrated to increase the efficiency and
extend playback time by optimizing the headphone driver
supply voltages according to the volume control.
The flexible input configuration allows single ended or
differential stereo inputs. Mixers allow highly flexible routing
to the outputs. A ‘Voice Bypass’ path is also available for
low-power voice applications.
The WM9094 is controlled using a two-wire I2C interface.
An integrated oscillator generates all internal clocks,
removing the need to provide any external clock.
Separate mixer and volume controls are provided for each
headphone and speaker driver. Automatic Gain Control
limits the speaker output signal in order to prevent clipping.
DC offset correction to less than 1mV guarantees a
pop/click-free headphone start up.
The WM9094 is available in a 2.0mm x 2.5mm 20-bump
CSP package.
BLOCK DIAGRAM
FEATURES
Mono Class D speaker driver
- 2W at 5V SVDD @1%THD+N into 4
- 650mW at 3.6V SVDD @1%THD+N into 8
- 92dB SNR
Ground referenced stereo headphone driver
- 34mW into 16load @ 1% THD+N
- 96dB SNR
- 80dB THD+N
Mono Class AB earpiece driver
- 40mW into 8load
Differential and single ended analogue input configurations
- Compatible with ground-referenced audio sources
Integrated oscillator for clocking requirements
I2C 2-wire software control interface
Automatic gain control (AGC) for Class D speaker output
Pop and click suppression, < 1mV DC offset
<50ms start up time
Excellent RF and TDMA noise immunity
Ultra low power consumption
- 4mW quiescent for headphone driver
- 5mW quiescent for speaker driver (Class D)
Shutdown current < 1uA
Supply voltage
- SVDD = 2.7V to 5.5V
- HPVDD = 1.8V
1.8V to 2.7V control interface compatibility
20-bump CSP package
APPLICATIONS
Mobile handsets
WOLFSON MICROELECTRONICS plc
[1] This product is protected by Patents US 7,622,984 and US 7,626,445
Production Data, March 2013, Rev 4.0
Copyright 2013 Wolfson Microelectronics plc



Wolfson Microelectronics WM9094
WM9094
Production Data
TABLE OF CONTENTS
DESCRIPTION....................................................................................................... 1 
FEATURES ............................................................................................................ 1 
APPLICATIONS..................................................................................................... 1 
BLOCK DIAGRAM ................................................................................................ 1 
TABLE OF CONTENTS......................................................................................... 2 
PIN CONFIGURATION .......................................................................................... 4 
ORDERING INFORMATION.................................................................................. 4 
PIN DESCRIPTION................................................................................................ 5 
ABSOLUTE MAXIMUM RATINGS ........................................................................ 6 
RECOMMENDED OPERATING CONDITIONS..................................................... 6 
ELECTRICAL CHARACTERISTICS ..................................................................... 7 
TERMINOLOGY ............................................................................................................. 10 
PERFORMANCE PLOTS............................................................................................... 11 
TYPICAL PERFORMANCE ................................................................................. 12 
POWER CONSUMPTION .............................................................................................. 12 
AUDIO SIGNAL PATHS DIAGRAM .................................................................... 13 
CONTROL INTERFACE TIMING......................................................................... 14 
DEVICE DESCRIPTION ...................................................................................... 15 
INTRODUCTION ............................................................................................................ 15 
INPUT SIGNAL PATH .................................................................................................... 16 
LINE INPUTS............................................................................................................................................. 17 
INPUT PGA ENABLE ................................................................................................................................ 17 
INPUT PGA CONFIGURATION ................................................................................................................ 18 
INPUT PGA VOLUME CONTROL............................................................................................................. 18 
OUTPUT SIGNAL PATH ................................................................................................ 21 
OUTPUT SIGNAL PATHS ENABLE.......................................................................................................... 22 
SPEAKER MIXER CONTROL ................................................................................................................... 23 
SPEAKER OUTPUT VOLUME CONTROL................................................................................................ 24 
SPEAKER BOOST MIXER CONTROL ..................................................................................................... 24 
HEADPHONE MIXER CONTROL ............................................................................................................. 25 
HEADPHONE OUTPUT VOLUME CONTROL.......................................................................................... 27 
AUTOMATIC GAIN CONTROL (AGC)........................................................................... 29 
AGC CONTROL ........................................................................................................................................ 29 
AGC ANTI-CLIP......................................................................................................................................... 30 
AGC POWER LIMITING ............................................................................................................................ 31 
ANALOGUE OUTPUTS ................................................................................................. 33 
SPEAKER OUTPUT CONFIGURATIONS.................................................................................................33 
HEADPHONE OUTPUT CONFIGURATIONS ........................................................................................... 35 
CLOCKING CONTROL .................................................................................................. 35 
CONTROL INTERFACE................................................................................................. 37 
CONTROL WRITE SEQUENCER.................................................................................. 40 
INITIATING A SEQUENCE........................................................................................................................ 40 
PROGRAMMING A SEQUENCE .............................................................................................................. 41 
DEFAULT SEQUENCES ........................................................................................................................... 44 
POWER SEQUENCES AND POP SUPPRESSION CONTROL.................................... 46 
INPUT VMID CLAMPS .............................................................................................................................. 46 
HEADPHONE ENABLE/DISABLE ............................................................................................................. 47 
RECOMMENDED HEADPHONE START UP SEQUENCE....................................................................... 49 
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PD, March 2013, Rev 4.0
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Wolfson Microelectronics WM9094
Production Data
WM9094
CHARGE PUMP............................................................................................................. 50 
DC SERVO..................................................................................................................... 51 
DC SERVO ENABLE AND START-UP...................................................................................................... 51 
DC SERVO ACTIVE MODES .................................................................................................................... 53 
DC SERVO READBACK ........................................................................................................................... 54 
REFERENCE VOLTAGES AND MASTER BIAS ........................................................... 55 
POWER MANAGEMENT ............................................................................................... 56 
THERMAL SHUTDOWN ................................................................................................ 58 
SOFTWARE RESET AND CHIP ID ............................................................................... 58 
REGISTER MAP .................................................................................................. 59 
REGISTER BITS BY ADDRESS .................................................................................... 61 
APPLICATIONS INFORMATION ........................................................................ 78 
RECOMMENDED EXTERNAL COMPONENTS ............................................................ 78 
AUDIO INPUT PATHS............................................................................................................................... 78 
POWER SUPPLY DECOUPLING ............................................................................................................. 79 
HEADPHONE OUTPUT PATH.................................................................................................................. 79 
CLASS D SPEAKER CONNECTIONS ...................................................................................................... 80 
RECOMMENDED EXTERNAL COMPONENTS DIAGRAM...................................................................... 82 
PCB LAYOUT CONSIDERATIONS ............................................................................... 83 
CLASS D LOUDSPEAKER CONNECTION............................................................................................... 83 
PACKAGE DIMENSIONS.................................................................................... 84 
IMPORTANT NOTICE ......................................................................................... 85 
ADDRESS: ..................................................................................................................... 85 
REVISION HISTORY ........................................................................................... 86 
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PD, March 2013, Rev 4.0
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