WM9001

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WM9001 powerful, high quality speaker driver which operate class mode, providing total flexibility system designer. leakage, high PSRR pop/click suppression enable direct battery connection speaker supply. noise suppression techniques differential design used suppress undesired noise. single-ended input option been included complete system flexibility. device enabled setting logic pin. class clock generated internal oscillator, supplied from external clock source. Flexible speaker boost options (requiring additional components) allow output volume maximised various SPKVDD/AVDD combinations while minimising internal power consumption. WM9001 available 3x3mm package, ideal portable systems such mobile phones, portable navigation devices, media players, laptop computers electronic dictionaries.
WM9001
Dual-Mode Class AB/D Speaker Driver
FEATURES
Class speaker driver modes flexibility Speaker driver provides into <0.1% 104dB (Class AB), 97dB (Class Differential single-ended input modes >80dB PSRR 217Hz (SPKVDD) typical leakage with direct battery connection Filterless speaker connection Fully differential architecture (differential mode) Pop/click suppression noise suppression Fully compatible with Wolfson CODECs including WM8990 WM8991 Internal oscillator external clock source Thermal shutdown protection 3x3mm package
APPLICATIONS
Mobile phones Portable navigation devices Portable media players Laptop computers portable gaming devices Electronic dictionaries General-purpose high quality speaker amplifier
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Pre-Production, June 2009,
Copyright ©2009 Wolfson Microelectronics
WM9001 TABLE CONTENTS
Pre-Production
DESCRIPTION FEATURES.1 APPLICATIONS TABLE CONTENTS CONFIGURATION.3 ORDERING INFORMATION DESCRIPTION ABSOLUTE MAXIMUM RATINGS.5 RECOMMENDED OPERATING CONDITIONS THERMAL PERFORMANCE POWER DE-RATING ELECTRICAL CHARACTERISTICS TERMINOLOGY TYPICAL POWER CONSUMPTION SPEAKER DRIVER PERFORMANCE
CLASS MODE CLASS MODE
PSRR PERFORMANCE.12 EFFICIENCY AUDIO SIGNAL PATHS.14 DEVICE DESCRIPTION.15
INTRODUCTION. POWER RESET ENABLE. INPUT SIGNAL PATH. SYNC SPEAKER DRIVER MODE SELECT. SIGNAL BOOST CONTROL THERMAL SHUTDOWN
NOISE SUPPRESSION POPS CLICK SUPPRESSION APPLICATIONS INFORMATION
EXTERNAL COMPONENTS.
PACKAGE DIMENSIONS IMPORTANT NOTICE
ADDRESS.
June 2009,
Pre-Production
WM9001
CONFIGURATION
WM9001 supplied package
ORDERING INFORMATION
DEVICE WM9001GEFL WM9001GEFL/R MINIMUM ORDER QUANTITY 3500 TEMPERATURE RANGE -40°C 85°C -40°C 85°C PACKAGE MOISTURE SENSITIVITY LEVEL PEAK SOLDERING TEMPERATURE 260°C 260°C
June 2009,
WM9001 NAME INP_SEL BSEL2 BSEL1 BSEL0 VMID AVDD CDMODE AGND SYNC VOUTN SPKGND SPKVDD VOUTP TYPE Digital Input Analogue Input Enable Analogue Input Digital Input Digital Input Digital Input Analogue Output Supply Digital Supply Digital Input Analogue Output Supply Supply Analogue Output DESCRIPTION Audio Input Mode Select Positive differential input Device Enable input Negative differential input Signal Boost Control[2] Signal Boost Control[1] Signal Boost Control[0] Midrail voltage decoupling capacitor Analogue supply Class AB/D Mode select Analogue supply ground Class clock input Speaker negative output Speaker driver supply ground Speaker driver supply Speaker positive output
Pre-Production
June 2009,
Pre-Production
WM9001
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings stress ratings only. Permanent damage device caused continuously operating beyond these limits. Device functional operating limits guaranteed performance specifications given under Electrical Characteristics test conditions specified. Sensitive Device. This device manufactured CMOS process. therefore generically susceptible damage from excessive static voltages. Proper precautions must taken during handling storage this device. Wolfson tests package types according IPC/JEDEC J-STD-020B Moisture Sensitivity determine acceptable storage conditions prior surface mount assembly. These levels are: MSL1 unlimited floor life <30°C Relative Humidity. normally stored moisture barrier bag. MSL2 storage year <30°C Relative Humidity. Supplied moisture barrier bag. MSL3 storage hours <30°C Relative Humidity. Supplied moisture barrier bag. Moisture Sensitivity Level each package type specified Ordering Information. CONDITION AVDD SPKVDD Digital Inputs voltage range Analogue Inputs voltage range Operating temperature range, Junction temperature, Storage temperature after soldering -0.3V -0.3V AGND -0.3V AGND -0.3V +4.5V AVDD +0.3V AVDD +0.3V
RECOMMENDED OPERATING CONDITIONS
PARAMETER Analogue supply Speaker supply Ground Notes: Analogue speaker grounds must always within 0.3V each other. supplies completely independent from each other (i.e. internally connected). AVDD must less than equal SPKVDD. SPKVDD must high enough support peak output voltage when using DCGAIN ACGAIN functions, avoid output waveform clipping. Peak output voltage AVDD*(DCGAIN+ACGAIN)/2. SYNC pins compatible with voltage (eg. 1.8v) logic levels from external devices, accept logic digital inputs 1.6V, even though WM9001 AVDD supply minimum 2.7V. This provides compatibility with voltage DVDD controlling device such WM8991 CODEC. SYMBOL AVDD SPKVDD AGND, SPKGND UNIT
June 2009,
WM9001 THERMAL PERFORMANCE
Pre-Production
Thermal analysis should performed intended application prevent WM9001 from exceeding maximum junction temperature. Several contributing factors affect thermal performance most notably physical properties mechanical enclosure, location device relation surrounding components number layers. Connecting pins/paddle through thermal vias into large ground plane will heat extraction. Three main heat transfer paths exist surrounding air: Package (radiation). Package bottom (radiation). Package pins/paddle/balls (conduction).
temperature rise given power dissipated device. thermal resistance from junction ambient temperature therefore measure heat transfer from surrounding air. determined with reference JEDEC standard JESD51-9.
junction temperature given +TR, where ambient temperature.
PARAMETER Operating temperature range Operating junction temperature Thermal Resistance
SYMBOL
UNIT °C/W
June 2009,
Pre-Production
WM9001
POWER DE-RATING
speaker driver been designed drive maximum into with supply. However, thermal restrictions defined package limit amount power that safely dissipated device without exceeding maximum operating junction temperature. Power dissipated device correlates directly with speaker efficiency, hence there separate de-rating curves class class operation. Under circumstances should recommended maximum powers exceeded. de-rating curves Figure based sinusoidal input signal delivering maximum output power into
CLASS
CLASS
SPKVDD 3.6V SPKVDD 3.3V SPKVDD 5.5V SPKVDD SPKVDD 4.2V
SPKVDD SPKVDD 2.7V
Figure Speaker Power De-Rating Curves
June 2009,
WM9001 ELECTRICAL CHARACTERISTICS
Test Conditions AVDD 3.3V; SPKVDD +25oC, 1kHz input signal, BSEL[2:0] unless otherwise stated. PARAMETER Analogue Input Pins (LIN, LIP) Maximum Full-Scale Input Signal Level Differential Mode (INP_SEL=0): This maximum each input pin; total differential input this figure. Single-Ended Mode (INP_SEL=1): This maximum LIP. Note that maximum signal level scales proportion AVDD (AVDD/3.3). Input Resistance Differential Mode (INP_SEL=0) Gain=0dB (BSEL[2:0]=000) Gain=2.1dB (BSEL[2:0]=001) Gain=2.9dB (BSEL[2:0]=010) Gain=3.6dB (BSEL[2:0]=011) Gain=4.5dB (BSEL[2:0]=100) Gain=5.1dB (BSEL[2:0]=101) Input Resistance Single-Ended Mode (INP_SEL=1) Input Capacitance Speaker Driver Performance (A-weighted) (PO=0.5W) THD+N (PO=0.5W) (PO=1.0W) THD+N (PO=1.0W) (A-weighted) (PO=0.5W) THD+N (PO=0.5W) (PO=1.0W) THD+N (PO=1.0W) Mute Attenuation Common Mode Rejection Ratio Bandwidth AVDD PSRR SPKVDD PSRR Offset load SPKVDD Leakage Current AVDD Leakage Current Reference Levels VMID Midrail Reference Voltage Output Common Mode Voltage (Note: BSEL[2:0]=110 BSEL[2:0]=111 reserved settings) BSEL[2:0] BSEL[2:0] BSEL[2:0] BSEL[2:0] BSEL[2:0] BSEL[2:0] AVDD/2 1.00 VMID 1.27 VMID 1.40 VMID 1.52 VMID 1.67 VMID 1.80 VMID EN=0 EN=0 100mV pk-pk ripple, 217Hz BSEL[2:0] (1.52x) Bridge Tied Load Class Mode Differential Single-Ended Input Modes BSEL[2:0] (1.52x) Bridge Tied Load Class Mode Differential Single-Ended Input Modes Device disabled (EN=0) Differential Mode gain settings TEST CONDITIONS
Pre-Production
UNIT Vrms
June 2009,
Pre-Production Test Conditions AVDD 3.3V; SPKVDD +25oC, 1kHz input signal, BSEL[2:0] unless otherwise stated. PARAMETER Input Output (for hardware control) Input HIGH Level (BSEL, CDMODE) Input HIGH Level (EN, SYNC) Input Level Input capacitance Input leakage Oscillator Free-running oscillator frequency External clock frequency range Class Enable time Class Enable time Vmid capacitor 4.7F Vmid capacitor 4.7F 1000 1000 -0.9 TEST CONDITIONS
WM9001
UNIT
Power-Up Time (Based recommended Vmid capacitor value; these times will vary with different capacitors)
TERMINOLOGY
Signal-to-Noise Ratio (dB) measure difference level between maximum theoretical full scale output signal output with input signal applied. Total Harmonic Distortion (dB) level value harmonic distortion products relative amplitude measured output signal. Total Harmonic Distortion plus Noise (dB) THD+N level value harmonic distortion products plus noise specified bandwidth relative amplitude measured output signal. performance measurements carried with 20kHz pass filter, where noted A-weighted filter. Failure such filter will result higher lower readings than found Electrical Characteristics. pass filter removes band noise; although audible affect dynamic specification values. Mute Attenuation This measure difference level between full scale output signal output with mute applied.
June 2009,
WM9001 TYPICAL POWER CONSUMPTION
MODE BATTERY LEAKAGE EN=0, AVDD=0V STANDBY LEAKAGE Standby EN=0, AVDD enabled 2.1dB 2.1dB 3.6dB 3.6dB QUIESCENT Class Speaker Mode 2.1dB 2.1dB 3.6dB 3.6dB Class Speaker Mode Internal Oscillator 2.1dB 2.1dB 3.6dB 3.6dB Class Speaker Mode External Oscillator 2.1dB 2.1dB 3.6dB 3.6dB ACTIVE Class Speaker Mode 0.45W into Class Speaker Mode 0.2W into Class Speaker Mode into Class Speaker Mode 0.5W into 3.6dB 1.36 120.45 3.6dB 1.34 235.15 3.6dB 0.35 144.22 3.6dB 800kHz 800kHz 800kHz 800kHz 800kHz GAIN CDMODE SYNC INP_SEL AVDD (uA) (uA) 7.67 8.16 8.91 8.93 9.75 (mA) 0.33 0.35 0.35 0.38 1.09 1.22 1.36 1.36 1.08 1.23 1.37 1.37 1.52 (mA) 0.35 SPKVDD (uA) 0.02 0.06 0.11 0.14 0.17 (uA) 0.02 0.07 0.37 0.64 (mA) 3.45 4.69 6.37 7.42 1.08 1.52 2.15 2.42 1.13 1.54 1.76 2.19 2.47 (mA) 211.63
Pre-Production
TOTAL (uW) 0.054 0.222 0.462 0.935 (uW) 20.763 24.739 29.823 31.319 38.62 (mW) 10.12 18.35 24.71 42.16 5.84 12.06 15.23 18.74 5.97 11.91 15.45 19.06 (mW) 1059.3 722.26 1180.18 606.73
Note that Gain settings determined BSEL[2:0] values follows: Gain (dB) 2.1dB 2.9dB 3.6dB 4.5dB 5.1dB Gain 1.00x 1.27x 1.40x 1.52x 1.67x 1.80x BSEL[2] BSEL[1] BSEL[0]
June 2009,
Pre-Production
WM9001
SPEAKER DRIVER PERFORMANCE
THD+N performance Speaker Driver shown below Class mode Class mode. Load 22H, Frequency 1kHz. Data provided four typical Power Supply /Gain combinations: AVDD 2.7V 3.0V 3.3V 3.3V SPKVDD 2.7V 3.7V 4.2V 5.0V GAIN (x1.0) (x1.27) (x1.27) (x1.52)
CLASS MODE
WM9001 THD+N Ratio Output Power
Class
THD+N Ratio
0.01
0.001 Output Power SPKVDD=5.0V, AVDD=3.3V, Gain=3.6dB SPKVDD=3.7V, AVDD=3.0V, Gain=2.1dB SPKVDD=4.2V, AVDD=3.3V, Gain=2.1dB SPKVDD=2.7V, AVDD=2.7V, Gain=0dB
Figure Class Speaker Performance
CLASS MODE
WM9001 THD+N Ratio Output Power
Class
THD+N Ratio
0.01
0.001 Output Power SPKVDD=5.0V, AVDD=3.3V, Gain=3.6dB SPKVDD=3.7V, AVDD=3.0V, Gain=2.1dB SPKVDD=4.2V, AVDD=3.3V, Gain=2.1dB SPKVDD=2.7V, AVDD=2.7V, Gain=0dB
Figure Class Speaker Performance
June 2009,
WM9001 PSRR PERFORMANCE
Pre-Production
Typical PSRR versus frequency curves provided below. curves were produced superimposing 100mV pk-pk ripple onto level supply measuring rejection this signal output.
CLASS SPKVDD PSRR
WM9001 Class SPKVDD PSRR
AVDD=3.3V, SPKVDD=5.0V
Differential Mode PSRR (dB)
PSRR (dB)
CLASS SPKVDD PSRR
WM9001 Class SPKVDD PSRR
AVDD=3.3V, SPKVDD=5.0V
Differential Mode Single-Emded Mode
Single-Emded Mode
Frequency (kHz)
Frequency (kHz)
CLASS AVDD PSRR
WM9001 Class AVDD PSRR
AVDD=3.3V, SPKVDD=5.0V
Differential Mode PSRR (dB)
PSRR (dB)
CLASS AVDD PSRR
WM9001 Class AVDD PSRR
AVDD=3.3V, SPKVDD=5.0V
Differential Mode Single-Emded Mode
Single-Emded Mode
Frequency (kHz)
Frequency (kHz)
Note: measurement noise floor approximately 88dB
June 2009,
Pre-Production
WM9001
EFFICIENCY
Typical Efficiency versus output power curves provided below both class class modes.
CLASS
WM9001 Class Efficiency
AVDD=3.3V, SPKVDD=5.0V, BSEL[2:0]=011 (x1.52) Efficiency
Efficiency
CLASS
WM9001 Class Efficiency
AVDD=3.3V, SPKVDD=5.0V, BSEL[2:0]=011 (x1.52)
1000 1200 1400 Output Power (mW) Differential Mode Single-Ended Mode
Differential Mode Single-Ended Mode 1000 1200 1400
Output Power (mW)
June 2009,
WM9001 AUDIO SIGNAL PATHS
WM9001 speaker driver operate modes:
Pre-Production
INP_SEL=0: Takes differential audio input produces differential class class output. audio signal path illustrated below.
Figure Differential Mode Audio Signal Paths
INP_SEL=1: Takes single-ended audio input produces differential class class output. audio signal path illustrated below.
Figure Single-Ended Mode Audio Signal Paths
June 2009,
Pre-Production
WM9001
DEVICE INTRODUCTION
WM9001 powerful mono speaker driver, which operate class mode, providing total flexibility system designer. WM9001 deliver class mode, Figure class mode, Figure into load. input configured either single channel differential line output offering good noise rejection characteristics, single-ended line output systems where there differential option. used stand-alone device, conjunction with CODEC such WM8991 WM8990 provide complete stereo solution. gain settings speaker driver mode configurable hardware control pins BSEL[2:0] CDMODE. stand-alone operation these pins tied logic 1/0. class amplifier requires clock signal. internal oscillator used stand alone operation tying SYNC logic 1/0. Alternatively external clock used applying this signal SYNC pin. (Enable) provides controllable method switching ON/OFF speaker outputs. very small packages make WM9001 ideal portable systems, such mobile phones, portable navigation devices, media players, laptop computers electronic dictionaries.
POWER RESET
WM9001 includes internal Power-On Reset (POR) circuit which used reset device into default state power circuit controlled AVDD power supply. Note that there SPKVDD supply. When chip powered down, speaker driver outputs, SPKP SPKN, become tri-state.
ENABLE
chip enabled logic pin. NAME DESCRIPTION Device Enable input Device Disabled Device Enabled
Table Device Enable Control
should used disable device prior removing audio clock (removing external clock will disable output). When chip disabled, speaker driver outputs become tri-state. compatible with voltage (eg. 1.8v) logic levels from external devices, accept logic digital inputs 1.6V, even though WM9001 AVDD supply minimum 2.7V. This provides compatibility with voltage DVDD controlling device such WM8991 CODEC. Ultra quiescent current disabled state minimises extends battery life this condition. typical values SPKVDD current AVDD current disabled (Standby) state described Electrical Characteristics section.
June 2009,
WM9001
INPUT SIGNAL PATH
Pre-Production
line inputs WM9001 identified diagram. These fully balanced differential input pair, with matched impedances both terminals. input stage WM9001 driven voltage difference between these pins. This results very noise amplifier stage, common mode noise (unwanted signals that present equal amplitude both pins) cancelled input reproduced output. input also configured single-ended line input Table below. Single-ended differential conversion carried internally with channel input (normally LIN) connected inverted version channel (LIP). this configuration should connected analogue ground. NAME INP_SEL DESCRIPTION Input Mode Select Differential Mode (LIP/LIN) Single-Ended Mode (LIP only)
Table Input Mode Control WM9001 inputs biased Vmid (equal AVDD/2) therefore DC-blocking capacitors required when connecting Vmid reference input signals. Vmid must decoupled externally `Applications Information' more detail.
SYNC
Class operation WM9001 clocked using methods. Externally supplied clock SYNC (800kHz typical). Internal oscillator, allowing stand-alone operation device.
Clock source selection determined automatically WM9001 according status SYNC pin. clock signal present SYNC pin, then this signal automatically selected WM9001 clock source. clock signal interrupted this pulled high low, then internal oscillator will selected. recommended interrupt change clock sources whilst device enabled. NAME SYNC DESCRIPTION Class clock input Constant Internal Oscillator enabled Clock Clock used sync class
Table Sync Clock Control
SYNC compatible with voltage (eg. 1.8v) logic levels from external devices, accept logic digital inputs 1.6V, even though WM9001 AVDD supply minimum 2.7V. This provides compatibility with voltage DVDD controlling device such WM8991 CODEC.
Figure System Clock Timing Requirements
Please refer Electrical Characteristics minimum maximum SYNC frequencies.
June 2009,
Pre-Production
WM9001
SPEAKER DRIVER MODE SELECT
speaker outputs operate configuration, either class class mode. speaker driver mode selected using CDMODE pin. NAME CDMODE DESCRIPTION Class AB/D Mode Select Class mode Class mode
Table Class Mode Control
SIGNAL BOOST CONTROL
levels signal boost available provide maximum output power many commonly used SPKVDD/AVDD combinations. These boost options available class class modes. gain levels from 1.0x 1.8x selected using BSEL[2:0] input pins. Note that ACGAIN DCGAIN settings. appropriate SPKVDD supply voltage must provided prevent waveform clipping when signal boost used.
Figure Signal Boost Operation
12,11,10
NAME BSEL[2:0]
DESCRIPTION Signal Boost Control 1.00x boost (+0dB) 1.27x boost (+2.1dB) 1.40x boost (+2.9dB) 1.52x boost (+3.6dB) 1.67x boost (+4.5dB) 1.8x boost (+5.1dB) Reserved Reserved
Table Signal Boost Control
prevent noise, BSEL[2:0] settings should modified while speaker outputs enabled. Note that ACGAIN DCGAIN settings.
June 2009,
WM9001
THERMAL SHUTDOWN
Pre-Production
protect WM9001 from damage overheating, thermal shutdown circuit included. junction temperature exceeds approximately then WM9001 will disabled. Note that internal power dissipation WM9001 significantly higher class mode than class mode "Power De-Rating" section. possible disable thermal shutdown function.
NOISE SUPPRESSION
WM9001 provides internal filtering which minimises impact high frequency noise system.
POPS CLICK SUPPRESSION
WM9001 incorporates mechanisms that reduce audible pops/clicks speaker outputs. prevent noise, recommended that BSEL, SYNC, CDMODE INP_SEL settings should modified while speaker outputs enabled. Muting device (setting during update these settings recommended.
June 2009,
Pre-Production
WM9001
APPLICATIONS INFORMATION
TYPICAL STAND-ALONE USAGE
WM9001 used differential speaker amplifier, illustrated Figure single-ended speaker amplifier Figure
Figure Operation WM9001 Stand-alone Differential Amplifier
Figure Operation WM9001 Stand-alone Single-ended Amplifier
both configurations blocking capacitors required input paths. typical application might capacitors this purpose, providing high pass cut-off frequency less than 20Hz. single-ended mode recommend that unused input connected analogue ground.
June 2009,
WM9001
TYPICAL USAGE WITH WM8991 CODEC
Pre-Production
WM9001 used conjunction with CODEC such WM8991 provide complete stereo solution. Such solution allows left right drivers positioned separately close speakers possible, minimising emissions from long speaker cables. this configuration SYNC pins driven from GPIO outputs from WM8991, and, providing that WM8991 WM9001 connected same analogue supply (AVDD), then blocking capacitors required inputs WM9001.
LONMIX
Mixer Mixer Inverted Line
Record Mixer
INPUT PGAs
INPUT MIXERS
OUTPUT MIXERS
0dB, -6dB Line
LOPMIX
Left Line Input Speaker Voice Left Line Input Left Output Mixer -16.5dB +30dB, 0.75dB steps -12dB +6dB -12dB +6dB -12dB +6dB -12dB +6dB Left Left Bypass LIN3 RIN3 Bypass Bypass -12dB 0dB, steps -73dB +6dB, steps Mixer
RXVOICE
DIFFINL
RXVOICE DIFFINR
-16.5dB +30dB, 0.75dB steps
RIN3/GPI8 RIN4/RXP RIN1 RIN2
0dB, +30dB 0dB, +30dB -12dB +6dB -12dB +6dB
RIN34
-16.5dB +30dB, 0.75dB steps
RIN12
MICBIAS Current Detect
VREF
MICBIAS
250k
250k
Figure Operation WM9001 Conjunction with WM8991
SYNC pins compatible with voltage (eg. 1.8v) logic levels from external devices, accept logic digital inputs 1.6V, even though WM9001 AVDD supply minimum 2.7V. This provides compatibility with voltage DVDD controlling device such WM8991 CODEC.
LIN4/RXN
LIN3/GPI7
LIN1 LIN2
OUT3MIX
0dB, -6dB
LEFT CHANNEL SPEAKER OUTPUT
OUT3
LIN12
-16.5dB +30dB, 0.75dB steps
-12dB +6dB -12dB +6dB 0dB, +30dB 0dB, +30dB
DIGITAL CORE
INMIXL AINLMUX
HIGH PASS FILTER (Voice HiFi) -71.625dB +17.625dB, 0.375dB steps -36dB 0dB, steps -71.625dB 0dB, 0.375dB steps
LIN34
LOPGA
LADC bypass LIN2 Mixer Mixer -73dB +6dB, steps RIN2 RADC bypass
LOUT
1.27x 1.4x, 1.52x 1.67x 1.8x
SPKMIX SPKPGA
-73dB +6dB, steps
LOMIX
-73dB +6dB, steps
ROMIX
0dB, -6dB, -12dB
1xVMID, 1.27xVMID, 1.4xVMID, 1.52xVMID, 1.67xVMID 1.8xVMID
SPKN SPKP
AINRMUX INMIXR
HIGH PASS FILTER (Voice HiFi)
-71.625dB +17.625dB, 0.375dB steps
-71.625dB 0dB, 0.375dB steps
Bypass Bypass LIN3 RIN3 -12dB 0dB, steps
ROPGA
-73dB +6dB, steps
ROUT
0dB, +6dB, +12dB, +18dB
Right Bypass Right Right Line Input Right Output Mixer Voice Right Line Input Speaker Record
Mixer 0dB, -6dB
OUT4
OUT4MIX
ACGAIN DCGAIN REGISTERS
Mixer
ROPMIX
0dB, -6dB Line
AVDD DCVDD
DIGITAL AUDIO INTERFACE
A-law u-law support Support
GPIO
Alternative Interface Alternative MCLK Button Control Accessory Detect Clock Output Inverted ADCLRC MCLK2 MCLK
Inverted Mixer Mixer Line
RONMIX CONTROL INTERFACE
SYSCLK
AGND
VMID
AVDD
SPKVDD SPKGND
HPGND
DBVDD
DCVDD
DGND
BCLK
DACLRC
DACDAT
ADCDAT
ADCLRC/GPIO1
GPIO3/BCLK2 GPIO2/MCLK2
GPIO4/DACLRC2
GPIO6/ADCLRCB GPIO5/DACDAT2
MCLK
SCLK MODE
CSB/ADDR SDIN
HPVDD
SYNC
DIFFERENTIAL RIGHT CHANNEL SPEAKER OUTPUT
AVDD
AGND
SPKVDD SPKGND
INP_SEL
NOISE SUPPRESSION
THERMAL SHUTDOWN
POP/CLICK SUPPRESSION
ACGAIN
CLASS AB/D SPEAKER DRIVER
SPKP
AVDD
ACGAIN
Select
SPKN
VMID
DCGAIN OSCILLATOR
OUTPUT POWER BOOST SELECT CLOCK DETECT
DEVICE ENABLE CDMODE SYNC
BSEL[2:0]
ACGAIN DCGAIN
CDMODE
June 2009,
Pre-Production
WM9001
SPEAKER SELECTION
Class driver mode, WM9001 output contains high frequency signals resulting from switched operation. avoid need specific filter components, important make appropriate choice loudspeaker. Note that, Class mode usage, choice speaker important there high frequency harmonics WM9001 output. speaker inductance load resistance create low-pass filter which, ideally, will attenuate high frequency Class switching harmonics whilst passing desired audio frequencies. cut-off frequency speaker inductance resistance calculated follows: Therefore, speaker desired cut-off frequency 20kHz, speaker should chosen have inductance 20kHz speakers portable applications typically have inductance range 100H. inductance higher than value calculated above, then cut-off frequency will reduced, limiting audio bandwidth. Lower values inductance will result higher cut-off frequency. Class outputs contain harmonics much higher frequencies than recommended most speakers, cut-off frequency filter must therefore enough protect speaker.
Figure Speaker Equivalent Circuit
June 2009,
WM9001
LAYOUT CONSIDERATIONS
Pre-Production
efficiency speaker drivers affected series resistance between WM9001 speaker (e.g. inductor ESR) shown Figure This resistance should possible maximise efficiency.
Figure Speaker Connection Losses
distance between WM9001 speakers should kept minimum reduce series resistance, also reduce EMI. Further reductions achieved additional passive filtering and/or shielding shown Figure When additional passive filtering used, components should chosen minimise series resistance between WM9001 speaker, maximising efficiency. passive filtering will usually effective reducing frequencies around 30MHz. reduce emissions higher frequencies, ferrite beads placed close device possible will more effective.
SPKP WM9001 SPKN
SPKP
WM9001 SPKN
Long, exposed tracks emit more
SPKP WM9001 SPKN SPKP WM9001 SPKN
Short connection reduces
Shielding using ground plane Vdd) reduces
SPKP WM9001 SPKN
Filtering reduces filtering more effective removing frequencies below ~30MHz Ferrite beads more effective removing frequencies above ~30MHz
Ferrite beads reduce
Figure Reduction Techniques
June 2009,
Pre-Production
WM9001
EXTERNAL COMPONENTS
June 2009,
WM9001 PACKAGE DIMENSIONS
PLASTIC PACKAGE 0.75 BODY, 0.50 LEAD PITCH
DETAIL
Pre-Production
DM053.C
EXPOSED GROUND PADDLE
INDEX AREA (D/2 E/2)
DETAIL
VIEW
BOTTOM VIEW
0.08
DETAIL
DETAIL
degrees Datum
Terminal
SEATING PLANE
SIDE VIEW
DETAIL
0.32mm EXPOSED GROUND PADDLE
Exposed lead
DETAIL
Symbols REF: 0.70 0.20 1.65
Dimensions (mm) NOTE 0.75 0.80 0.02 0.05 0.20 0.25 0.30
3.00 1.70 1.75 3.00 1.65 1.70 1.75 0.50 0.325 0.375 0.425 Tolerances Form Position 0.15
0.10 0.10 JEDEC, MO-220, VARIATION VGGD-2.
NOTES: DIMENSION APPLIES METALLIZED TERMINAL MEASURED BETWEEN 0.15 0.30 FROM TERMINAL TIP. FALLS WITHIN JEDEC, MO-220, VARIATION VGGD-2. DIMENSIONS MILLIMETRES. TERMINAL IDENTIFIER TERMINAL NUMBERING CONVENTION SHALL CONFORM JEDEC 95-1 SPP-002. COPLANARITY APPLIES EXPOSED HEAT SINK SLUG WELL TERMINALS. REFER APPLICATIONS NOTE WAN_0118 FURTHER INFORMATION REGARDING FOOTPRINTS PACKAGE SOLDERING. THIS DRAWING SUBJECT CHANGE WITHOUT NOTICE.
June 2009,
Pre-Production
WM9001
IMPORTANT NOTICE
Wolfson Microelectronics ("Wolfson") products services sold subject Wolfson's terms conditions sale, delivery payment supplied time order acknowledgement.
Wolfson warrants performance products specifications effect date shipment. Wolfson reserves right make changes products specifications discontinue product service without notice. Customers should therefore obtain latest version relevant information from Wolfson verify that information current.
Testing other quality control techniques utilised extent Wolfson deems necessary support warranty. Specific testing parameters each device necessarily performed unless required regulation.
order minimise risks associated with customer applications, customer must adequate design operating safeguards minimise inherent procedural hazards. Wolfson liable applications assistance customer product design. customer solely responsible selection Wolfson products. Wolfson liable such selection circuitry other than circuitry entirely embodied Wolfson product.
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June 2009,

WM9001

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