Download pdf - DS-000069 ICS-43434 v1 - InvenSense · 2016-10-13 · ICS-43434 Page 5 of 21 Document Number: DS-000069 Revision: 1.2 TABLE 3. ACOUSTICAL/ELECTRICAL CHARACTERISTICS – LOW-POWER

ICS-43434

Multi-ModeMicrophonewithI2SDigitalOutput

InvenSensereservestherighttochangethedetailspecificationsasmayberequiredtopermitimprovementsinthedesignofitsproducts.

InvenSenseInc.1745TechnologyDrive,SanJose,CA95110U.S.A

+1(408)988–7339www.invensense.com

DocumentNumber:DS-000069Revision:1.2ReleaseDate:08/29/2016

GENERALDESCRIPTIONTheICS-43434isdigitalI2Soutputbottomportmicrophone.ThecompleteICS-43434solutionconsistsofaMEMSsensor,signalconditioning,ananalog-to-digitalconverter,decimationandantialiasingfilters,powermanagement,andanindustrystandard24-bitI²Sinterface.TheI²SinterfaceallowstheICS-43434toconnectdirectlytodigitalprocessors,suchasDSPsandmicrocontrollers,withouttheneedforanaudiocodecinthesystem.TheICS-43434hasmultiplemodesofoperation:HighPerformance,LowPower(AlwaysOn)andSleep.TheICS-43434hashighSNRand120dBSPLAOPinalloperationalmodes.TheICS-43434hasahighSNRof65dBAandawidebandfrequencyresponse.ThesensitivitytoleranceoftheICS-43434is±1dB,whichenableshigh-performancemicrophonearrayswithouttheneedforsystemcalibration.TheICS-43434isavailableinasmall3.50mm×2.65mm×0.98mmsurface-mountpackage.TheICS-43434isfunction-compatiblewiththeICS-43432whileprovidingequivalentelectro-acousticperformanceatlowerpowerconsumptionandinasmallerpackage.

APPLICATIONS• Wearables• SmartTelevisions• RemoteControls• IoTDevices• TeleconferencingSystems• GamingConsoles• SecuritySystems

FEATURESSPEC HIGHPERFORMANCE

MODELOW-POWER

MODESensitivity −26dBFS±1dB −26dBFS±1dB

SNR 65dBA 64dBACurrent 490µA 230µAAOP 120dBSPL 120dBSPL

SampleRate 23–51.6kHz 6.25–18.75kHz

• DigitalI²Sinterfacewithhighprecision24-bitdata• Widefrequencyresponsefrom60Hzto20kHz• Highpowersupplyrejection:−100dBFS• Small3.50mm×2.65mm×0.98mmsurface-mount

package• CompatiblewithSn/PbandPb-freesolderprocesses• RoHS/WEEEcompliant

FUNCTIONALBLOCKDIAGRAM

ORDERINGINFORMATION

PART TEMPRANGE PACKAGINGICS-43434 −40°Cto+85°C 13”Tape&ReelEV_ICS-43434-FX —

ICS-43434

ADCFILTER

HARDWARECONTROL

I2SSERIALPORTPOWER

MANAGEMENT

SCK

SD

WS

VDD

GND LR

ICS-43434

Page2of21DocumentNumber:DS-000069Revision:1.2

TABLEOFCONTENTSGeneralDescription.....................................................................................................................................................................1Applications..................................................................................................................................................................................1Features.......................................................................................................................................................................................1FunctionalBlockDiagram.............................................................................................................................................................1OrderingInformation...................................................................................................................................................................1

TableofContents....................................................................................................................................................................................2Specifications..........................................................................................................................................................................................4

Table1.Acoustical/ElectricalCharacteristics–General..............................................................................................................4Table2.Acoustical/ElectricalCharacteristics–High-PerformanceMode...................................................................................4Table3.Acoustical/ElectricalCharacteristics–Low-PowerMode..............................................................................................5Table4.DigitalFilterCharacteristics............................................................................................................................................5Table5.I²SDigitalINPUT/Output................................................................................................................................................6TimingDiagram............................................................................................................................................................................7

AbsoluteMaximumRatings....................................................................................................................................................................8Table6.AbsoluteMaximumRatings............................................................................................................................................8ESDCaution..................................................................................................................................................................................8SolderingProfile...........................................................................................................................................................................9Table7.RecommendedSolderingProfile....................................................................................................................................9

PinConfigurationsAndFunctionDescriptions......................................................................................................................................10Table8.PinFunctionDescriptions.............................................................................................................................................10

TypicalPerformanceCharacteristics.....................................................................................................................................................11TheoryofOperation..............................................................................................................................................................................12

PowerManagement...................................................................................................................................................................12StartupandNormalOperation.......................................................................................................................................12StandbyMode.................................................................................................................................................................12

SynchronizingMicrophones.......................................................................................................................................................12I²SDataInterface.......................................................................................................................................................................12

DataOutputMode..........................................................................................................................................................12DataWordLength...........................................................................................................................................................12DataWordFormat..........................................................................................................................................................12DataOutputFormat........................................................................................................................................................13

DigitalMicrophoneSensitivity...................................................................................................................................................13DigitalFilterCharacteristics.......................................................................................................................................................14

High-PassFilter...............................................................................................................................................................14Low-PassDecimationFilter.............................................................................................................................................14

ApplicationsInformation.......................................................................................................................................................................15Low-PowerMode.......................................................................................................................................................................15

ICS-43434


SleepMode................................................................................................................................................................................15SDOutputDriveStrength...........................................................................................................................................................15PowerSupplyDecoupling..........................................................................................................................................................15

SupportingDocuments..........................................................................................................................................................................16EvaluationBoardUserGuide.....................................................................................................................................................16ApplicationNotes.......................................................................................................................................................................16

PCBDesignAndLandPatternLayout....................................................................................................................................................17PCBMaterialAndThickness.......................................................................................................................................................17

HandlingInstructions............................................................................................................................................................................18PickAndPlaceEquipment..........................................................................................................................................................18ReflowSolder.............................................................................................................................................................................18BoardWash................................................................................................................................................................................18

OutlineDimensions...............................................................................................................................................................................19OrderingGuide...........................................................................................................................................................................19RevisionHistory..........................................................................................................................................................................20

ComplianceDeclarationDisclaimer......................................................................................................................................................21

ICS-43434


SPECIFICATIONSTABLE1.ACOUSTICAL/ELECTRICALCHARACTERISTICS–GENERALTA=25°C,VDD=1.8to3.3V,fS=48kHz,CLOAD=30pFunlessotherwisenoted.Typicalspecificationsarenotguaranteed.PARAMETER CONDITIONS MIN TYP MAX UNITS NOTESPERFORMANCEDirectionality Omni OutputPolarity Inputacousticpressurevs.

outputdata Non-Inverted

SupplyVoltage(VDD) 1.65 3.63 V SleepModeCurrent(IS) fS<3.125kHz 12 20 µA

TABLE2.ACOUSTICAL/ELECTRICALCHARACTERISTICS–HIGH-PERFORMANCEMODETA=25°C,VDD=1.8to3.3V,fS=48kHz,CLOAD=30pFunlessotherwisenoted.Typicalspecificationsarenotguaranteed.PARAMETER CONDITIONS MIN TYP MAX UNITS NOTESSensitivity 1kHz,94dBSPL −27 −26 −25 dBFS 1Signal-to-NoiseRatio(SNR) 20kHzbandwidth,A-weighted 65 dBA EquivalentInputNoise(EIN) 20kHzbandwidth,A-weighted 29 dBASPL DynamicRange DerivedfromEINandacoustic

overloadpoint 91 dB

TotalHarmonicDistortion(THD) 105dBSPL 0.2 1 % PowerSupplyRejection(PSR) 217Hz,100mVp-psquarewave

superimposedonVDD=1.8V,A-weighted

−99 dBFS

PowerSupplyRejection—SweptSine

1kHzsinewave,VDD=1.8V −106 dBFS

AcousticOverloadPoint 10%THD 120 dBSPL

NoiseFloor 20Hzto20kHz,A-weighted,rms −90 dBFS

SupplyCurrent(IS) VDD=1.8V,noload 490 550 µA Note1:SensitivityisrelativetotheRMSlevelofasinewavewithpositiveamplitudeequalto100%1sdensityandnegativeamplitudeequalto0%1sdensity.

ICS-43434


TABLE3.ACOUSTICAL/ELECTRICALCHARACTERISTICS–LOW-POWERMODETA=25°C,VDD=1.8to3.3V,fS=16kHz,CLOAD=30pFunlessotherwisenoted.Typicalspecificationsarenotguaranteed.PARAMETER CONDITIONS MIN TYP MAX UNITS NOTESSensitivity 1kHz,94dBSPL −27 −26 −25 dBFS 1Signal-to-NoiseRatio(SNR) 20kHzbandwidth,A-weighted 64 dBA EquivalentInputNoise(EIN) 20kHzbandwidth,A-weighted 30 dBASPL DynamicRange DerivedfromEINandacoustic

overloadpoint 90 dB

TotalHarmonicDistortion(THD) 105dBSPL 0.2 1 % PowerSupplyRejection(PSR) 217Hz,100mVp-psquarewave

superimposedonVDD=1.8V,A-weighted

−98 dBFS

PowerSupplyRejection—SweptSine

1kHzsinewave,VDD=1.8V −100 dBFS

AcousticOverloadPoint 10%THD 120 dBSPL

NoiseFloor 20kHzbandwidth,A-weighted,rms −90 dBFS

SupplyCurrent(IS) VDD=1.8V,noload 230 300 µA Note1:SensitivityisrelativetotheRMSlevelofasinewavewithpositiveamplitudeequalto100%1sdensityandnegativeamplitudeequalto0%1sdensity.

TABLE4.DIGITALFILTERCHARACTERISTICSPARAMETER CONDITIONS MIN TYP MAX UNITS NOTES

GroupDelayAcousticinputtodigitaloutput–includesfilterandI2Sserialoutput

2/fS sec.

PassBandRipple ±0.3 dB StopBandAttenuation 58 dB PassBand fs=48kHz 20 kHz

ICS-43434


TABLE5.I²SDIGITALINPUT/OUTPUT–40°C<TA<+85°C,1.8V<VDD<3.3V,unlessotherwisenoted.

PARAMETER CONDITIONS MIN MAX UNITS NOTESMODESWITCHINGSleepTime TimefromfSfalling

<3.125kHz 1 ms

Wake-UpTime High-Performancemode,SleepModetofWS>21.875kHz,outputwithin1dBoffinalsensitivity,poweron

20 ms

Wake-UpTime Low-PowerMode,SleepModetofWS>6.25kHz,outputwithin1dBoffinalsensitivity,poweron

20 ms

Switchingtime BetweenLow-PowerandHigh-PerformanceModes 10 ms

INPUT/OUTPUTSCKperiod(tSCP) Inputclockperiod 303 2500 ns SamplingFrequency(fS) SleepMode 3.125 kHz

Low-PowerMode 6.25 18.75 kHz High-PerformanceMode 23 51.6 kHz

SCKhigh(tSCH) 50 ns SCKlow(tSCL) 50 ns WSsetup(tWSS) 0 ns WShold(tWSH) 20 ns SCKDutyCycle 40 60 %

SDDataValid(tSDV)FromSCKfallingtovalidSDdata

75 ns

SDDataDisable(tSDD)FromSCKfallingtoSDoutputtristated

76 ns

tRISESCKrisetime(10%to90%level)

25 ns 1

tFALLSCKfalltime(90%to10%level)

25 ns 1

DIGITALINPUTVoltageInputLow(VIL) 0 0.3×VDD V

VoltageInputHigh(VIH) 0.7×VDD VDD V

SDDIGITALOUTPUTVoltageOutputLow(VOL) 0 0.35×VDD V

VoltageOutputHigh(VOH) 0.65×VDD VDD V

MaximumLoad fS=48kHz 85 pF Note 1: Guaranteed by design

ICS-43434


TIMINGDIAGRAM

Figure1.SerialDataPortTiming

ICS-43434


ABSOLUTEMAXIMUMRATINGSStressabovethoselistedasAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratingsonlyandfunctionaloperationofthedeviceattheseconditionsisnotimplied.Exposuretotheabsolutemaximumratingsconditionsforextendedperiodsmayaffectdevicereliability.TABLE6.ABSOLUTEMAXIMUMRATINGS

PARAMETER RATING

SupplyVoltage(VDD) −0.3Vto+3.63V

DigitalPinInputVoltage −0.3VtoVDD+0.3Vor3.63V,whicheverisless

SoundPressureLevel 160dB

MechanicalShock 10,000g

Vibration PerMIL-STD-883Method2007,TestConditionB

TemperatureRange

Biased −40°Cto+85°C

Storage −55°Cto+150°C

ESDCAUTION

ESD(electrostaticdischarge)sensitivedevice.Chargeddevicesandcircuitboardscandischargewithoutdetection.Althoughthisproductfeaturespatentedorproprietaryprotectioncircuitry,damagemayoccurondevicessubjectedtohighenergyESD.ThereforeproperESDprecautionsshouldbetakentoavoidperformancedegradationorlossoffunctionality.

ICS-43434


SOLDERINGPROFILE

Figure2.RecommendedSolderingProfileLimits

TABLE7.RECOMMENDEDSOLDERINGPROFILE

PROFILEFEATURE Sn63/Pb37 Pb-FreeAverageRampRate(TLtoTP) 1.25°C/secmax 1.25°C/secmax

Preheat

MinimumTemperature(TSMIN)

100°C 100°C

MinimumTemperature(TSMIN)

150°C 200°C

Time(TSMINtoTSMAX),tS 60secto75sec 60secto75secRamp-UpRate(TSMAXtoTL) 1.25°C/sec 1.25°C/secTimeMaintainedAboveLiquidous(tL) 45secto75sec ~50secLiquidousTemperature(TL) 183°C 217°CPeakTemperature(TP) 215°C+3°C/−3°C 260°C+0°C/−5°CTimeWithin+5°CofActualPeakTemperature(tP)

20secto30sec 20secto30sec

Ramp-DownRate 3°C/secmax 3°C/secmax

Time+25°C(t25°C)toPeakTemperature 5minmax 5minmax

*ThereflowprofileinTable7isrecommendedforboardmanufacturingwithInvenSenseMEMSmicrophones.AllmicrophonesarealsocompatiblewiththeJ-STD-020profile

tP

tL

t25°C TO PEAK TEMPERATURE

tSPREHEAT

CRITICAL ZONETL TO TP

TEM

PER

ATUR

E

TIME

RAMP-DOWN

RAMP-UP

TSMIN

TSMAX

TP

TL

ICS-43434


PINCONFIGURATIONSANDFUNCTIONDESCRIPTIONS

Figure3.PinConfiguration(topview,terminalsidedown)

TABLE8.PINFUNCTIONDESCRIPTIONS

PIN NAME TYPE FUNCTION

1 WS Input SerialData-WordSelectforI²SInterface.

Thispinincludesaninternal100kΩpull-downresistor.IfthepinispulledtoVDDin

standbymode,thenVDD/100kΩcurrentwillsinkthroughthepin.2 LR Input Left/Rightchannelselect.Whensetlow,themicrophoneoutputsitssignalintheleft

channeloftheI²Sframe.Whensethigh,themicrophoneoutputsitssignalintherightchannel.

3 GND Ground Ground.ConnecttogroundonthePCB.

4 SCK Input SerialDataClockforI²SInterface.5 VDD Power Power,1.65to3.63V.ThispinshouldbedecoupledtoGNDwitha0.1μFcapacitor.

6 SD Output SerialDataOutputforI²SInterface.Thispintristateswhennotactivelydrivingtheappropriateoutputchannel.TheSDtraceshouldhavea100kΩpull-downresistortodischargethelineduringthetimethatallmicrophonesonthebushavetristatedtheiroutputs.

ICS-43434


TYPICALPERFORMANCECHARACTERISTICS

Figure4.TypicalFrequencyResponse(Measured)

Figure5.TotalHarmonicDistortion+Noise(THD+N)vs.InputSPL

Figure6.PSRvs.Frequency,100mVp-pSweptSineWave

Figure7.Linearity

-30

-20

-10

0

10

20

30

10 100 1000 10000

NORM

ALIZED

AMPLITUDE

(dB)

FREQUENCY(Hz)

0.01

0.1

1

10

90 100 110 120 130

THD+

N(%

)

INPUTAMPLITUDE(dBSPL)

LOW-POWERMODE

HIGH-PERFORMANCEMODE

-120

-100

-80

-60

-40

-20

0

100 1,000 10,000

PSR(dBFS)

FREQUENCY(Hz)

LOW-POWERMODE

HIGH-PERFORMANCEMODE

-40

-30

-20

-10

0

90 100 110 120

OUTPUTAM

PLITUDE

(dBFS)

INPUTAMPLITUDE(dBSPL)

ICS-43434


THEORYOFOPERATIONPOWERMANAGEMENTTheICS-43434hasthreepowerstates:high-performancemode,low-powermodeandstandbymode.StartupandNormalOperationThestart-uptimeoftheICS-43434islessthan20ms.TheI2Sdatafromthemicrophoneisvalidtobeusedassoonasthedataisbeingoutput.Thepartisinnormaloperation(high-performanceandlow-powermodes)whenSCKandWSareactive.StandbyModeThemicrophoneentersstandbymodewhenthefrequencyofSCKfallsbelowabout200kHz.ItisrecommendedtoenterstandbymodebystoppingboththeSCKandWSclocksignalsandpullingthosesignalstogroundtoavoiddrawingcurrentthroughtheWSpin’sinternalpull-downresistor.Thetimingforexitingstandbymodeisthesameasnormalstartup.Itisnotrecommendedtosupplyactiveclocks(WSandSCK)totheICS-43434whilethereisnopowersuppliedtoVDD.DoingthiscontinuouslyturnsonESDprotectiondiodes,whichmayaffectlong-termreliabilityofthemicrophone.SYNCHRONIZINGMICROPHONESStereoICS-43434microphonesaresynchronizedbytheWSsignal,soaudiocapturedfromtwomicrophonessharingthesameclockwillbeinsync.ThetwomicrophoneswillsynchronouslysampletheacousticsignalsatthebeginningoftheI2Sframe(WSfallingedge).I²SDATAINTERFACETheslaveserialdataport’sformatisI²S,24-bit,twoscomplement.Theremustbe64SCKcyclesineachWSstereoframe.TheLRcontrolpindetermineswhethertheICS-43434outputsdataintheleftorrightchannel.Whensettotheleftchannel,thedatawillbeoutputfollowingWS’sfallingedgeandwhensettooutputontherightchannel,datawillbeoutputfollowingWS’srisingedge.Forastereoapplication,theSDpinsoftheleftandrightICS-43434microphonesshouldbetiedtogetherasshowninFigure8.TheformatofastereoI²SdatastreamisshowninFigure9.Figure10andFigure11showtheformatsofamonomicrophonedatastreamforleftandrightmicrophones,respectively.DataOutputModeTheoutputdatapin(SD)istristatedwhenitisnotactivelydrivingI²Soutputdata.SDimmediatelytristatesaftertheLSBisoutputsothatanothermicrophonecandrivethecommondataline.TheSDtraceshouldhaveapull-downresistortodischargethelineduringthetimethatallmicrophonesonthebushavetristatedtheiroutputs.A100kΩresistorissufficientforthis,asshowninFigure8.IftheSDlineneedstobedischargedfasterthana100kΩresistorcan,asmallerresistor,suchas10kΩ,canbeused.DataWordLengthTheoutputdatawordlengthis24bitsperchannel.DataWordFormatThedefaultdataformatisI²S(twoscomplement),MSB-first.Inthisformat,theMSBofeachwordisdelayedbyoneSCKcyclefromthestartofeachhalf-frame.

ICS-43434


Figure8.SystemBlockDiagram

Figure9.StereoOutputI²SFormat

Figure10.MonoOutputI²SFormatLeftChannel(LR=0)

Figure11.MonoOutputI²SFormatRightChannel(LR=1)

DataOutputFormatTheoutputdatawordlengthis24bits/channel.Thedatawordformatis2’scomplement,MSB-first.Theoutputdatapin(SD)istri-statedwhenitisnotactivelydrivingoutputdata.SDwillimmediatelytri-stateaftertheLSBisoutputsothatanothermicrophonecandrivethecommondataline.DIGITALMICROPHONESENSITIVITYThesensitivityofadigitaloutputmicrophoneisspecifiedinunitsofdBFS(decibelsrelativetoafull-scaledigitaloutput).A0dBFSsinewaveisdefinedasasignalwhosepeakjusttouchesthefull-scalecodeofthedigitalword(seeFigure5).ThismeasurementconventionmeansthatsignalswithadifferentcrestfactormayhaveanRMSlevelhigherthan0dBFS.Forexample,afull-scalesquarewavehasanRMSlevelof3dBFS.

SCK

WS

SD

SYSTEM MASTER(DSP, MICROCONTROLLER,

CODEC)

SCK

WS

SD

VDD

LEFTICS-43434

GND

0.1µF

FROM VOLTAGEREGUL ATOR(1.8VTO 3.3V)

LRSCK

WS

SD

VDD

RIGHTICS-43434

GND

0.1µF

100kΩ

VDD

LR

ICS-43434


Figure11.1kHz,0dBFSSineWave

Thedefinitionofa0dBFSsignalmustbeunderstoodwhenmeasuringthesensitivityoftheICS-43434.Anacousticinputsignalofa1kHzsinewaveat94dBSPLappliedtotheICS-43434resultsinanoutputsignalwitha−26dBFSlevel.Thismeansthattheoutputdigitalwordpeaksat−26dBbelowthedigitalfull-scalelevel.AcommonmisunderstandingisthattheoutputhasanRMSlevelof−29dBFS;however,thisisnotthecasebecauseofthedefinitionofa0dBFSsinewave.Thereisnocommonlyacceptedunitofmeasurementtoexpresstheinstantaneouslevelofadigitalsignaloutputfromthemicrophone,asopposedtotheRMSlevelofthesignal.SomemeasurementsystemsexpresstheinstantaneouslevelofanindividualsampleinunitsofD,where1.0Disdigitalfullscale(seeFigure11).Inthiscase,a−26dBFSsinewavehaspeaksat0.05D.Formoreinformationaboutdigitalmicrophonesensitivity,seetheAN-1112ApplicationNote,MicrophoneSpecificationsExplained.DIGITALFILTERCHARACTERISTICSTheICS-43434hasaninternaldigitalbandpassfilter.Ahigh-passfiltereliminatesunwantedlowfrequencysignals.Alow-passdecimationfilterscalesthepassbandwiththesamplingfrequencyandperformsrequiredout-of-bandnoisereduction.High-PassFilterTheICS-43434incorporatesahigh-passfiltertoremoveDCandlowfrequencycomponents.Thishighpassfilterhasa−3dBcornerfrequencyof24Hzanddoesnotscalewiththesamplingrate.Low-PassDecimationFilterTheanalog-to-digitalconverterintheICS-43434isasingle-bit,highorder,sigma-delta(Σ-Δ)runningatahighoversamplingratio.Thenoiseshapingoftheconverterpushesthemajorityofthenoisewellabovetheaudiobandandgivesthemicrophoneawidedynamicrange.However,itdoesrequireagoodqualitylow-passdecimationfiltertoeliminatethehighfrequencynoise.Thepassbandofthefilterextendsto0.417×fSand,inthatband,hasonly±0.3dBofripple.A48kHzsamplingrateresultsinapassbandof20kHzandahalfamplitudecornerat24kHz;thestop-bandattenuationofthefilteris58dB.Notethatthesefilterspecificationsscalewithsamplingfrequency.

1.0

–1.0

–0.8

–0.6

–0.4

–0.2

0

0.2

0.4

0.6

0.8

0 0.9 1.00.80.70.60.50.40.30.20.1

DIG

ITAL

AM

PLIT

UDE

(D)

TIME (ms)

ICS-43434


APPLICATIONSINFORMATIONLOW-POWERMODELowPowerMode(LPM)enablestheICS-43434tobeusedinanAlwaysOnlisteningmodeforkeywordspottingandambientsoundanalysis.TheICS-43434willenterLPMwhenthesamplingfrequencyisbetween6.25and18.75kHz.Inthismode,themicrophoneconsumesonly230µAwhileretaininghighelectro-acousticperformance.WhenonemicrophoneisinLPMforAlwaysOnlistening,asecondmicrophonesharingthesamedatalinemaybepowereddown.Inthiscase,whereonemicrophoneispoweredupandanotherispowereddownbydisablingtheVDDsupplyorinsleepmodebyreducingthefrequencyofaseparateclocksource,thedisabledmicrophonedoesnotpresentaloadtothesignalontheLPMmicrophone’sDATApin.SLEEPMODEThemicrophoneenterssleepmodewhenthesamplingfrequencyfallsbelow3.125kHz.Inthismode,themicrophonedataoutputisinahighimpedancestate.Thecurrentconsumptioninsleepmodeis12µA.TheICS-43434enterssleepmodewithin1msofthesamplingfrequencyfallingbelow3.125kHz.Themicrophonewakesupfromsleepmodeandbeginstooutputdata32,768SCKcyclesaftertheclockbecomesactive.Fora3.072MHzclock(fS=48kHz),themicrophonestartstooutputdatain10.7ms.Fora2.4MHzclock(fS=37.5kHz),themicrophonestartstooutputdatain13.7ms.Thewake-uptime(Table5)indicatesthetimefromwhentheclockisenabledtowhentheICS-43434outputsdatawithin1dBofitssettledsensitivity.SDOUTPUTDRIVESTRENGTHTheSDdataoutputpinmustdrivealoadthatincludesthePCBtraceandthetri-statedinputsoftheotherICS-43434SDpinsconnectedtothatsametrace.Thetri-statedloadcapacitanceoftheICS-43434SDpinisabout6pF.TheICS-43434hasbeendesignedtodrivealoadof85pF.POWERSUPPLYDECOUPLINGForbestperformanceandtoavoidpotentialparasiticartifacts,placinga0.1µFceramictypeX7RorbettercapacitorbetweenPin5(VDD)andgroundisstronglyrecommended.ThecapacitorshouldbeplacedasclosetoPin3aspossible.Theconnectionstoeachsideofthecapacitorshouldbeasshortaspossible,andthetraceshouldstayonasinglelayerwithnovias.Formaximumeffectiveness,locatethecapacitorequidistantfromthepowerandgroundpinsor,whenequidistantplacementisnotpossible,slightlyclosertothepowerpin.Thermalconnectionstothegroundplanesshouldbemadeonthefarsideofthecapacitor,asshowninFigure12.

Figure12.RecommendedPowerSupplyBypassCapacitorLayout

VDD GND

TOGND

TOVDD

CAPACITOR

ICS-43434


SUPPORTINGDOCUMENTSForadditionalinformation,seethefollowingdocuments.EVALUATIONBOARDUSERGUIDEAN-000088,Bottom-PortI2SOutputMEMSMicrophoneEvaluationBoardAPPLICATIONNOTESAN-100,MEMSMicrophoneHandlingandAssemblyGuideAN-1003,RecommendationsforMountingandConnectingtheInvenSenseBottom-PortedMEMSMicrophonesAN-1112,MicrophoneSpecificationsExplainedAN-1124,RecommendationsforSealingInvenSenseBottom-PortMEMSMicrophonesfromDustandLiquidIngressAN-1140,MicrophoneArrayBeamforming

ICS-43434


PCBDESIGNANDLANDPATTERNLAYOUTTherecommendedPCBlandpatternfortheICS-43434shouldbelaidouttoa1:1ratiotothesolderpadsonthemicrophonepackage,asshowninFigure13.TakecaretoavoidapplyingsolderpastetothesoundholeinthePCB.AsuggestedsolderpastestencilpatternlayoutisshowninFigure14.ThediameterofthesoundholeinthePCBshouldbelargerthanthediameterofthesoundportofthemicrophone.Aminimumdiameterof0.5mmisrecommended.

Figure13.PCBLandPatternLayout

Dimensionsshowninmillimeters

Figure14.SuggestedSolderPasteStencilPatternLayout

Dimensionsshowninmillimeters

PCBMATERIALANDTHICKNESSTheperformanceoftheICS-43434isnotaffectedbyPCBthickness.TheICS-43434canbemountedoneitherarigidorflexiblePCB.AflexiblePCBwiththemicrophonecanbeattacheddirectlytothedevicehousingwithanadhesivelayer.Thismountingmethodoffersareliablesealaroundthesoundportwhileprovidingtheshortestacousticpathforgoodsoundquality.

ICS-43434


HANDLINGINSTRUCTIONS PICKANDPLACEEQUIPMENTTheMEMSmicrophonecanbehandledusingstandardpick-and-placeandchipshootingequipment.TakecaretoavoiddamagetotheMEMSmicrophonestructureasfollows:

• Useastandardpickuptooltohandlethemicrophone.Becausethemicrophoneholeisonthebottomofthepackage,thepickuptoolcanmakecontactwithanypartofthelidsurface.

• Donotpickupthemicrophonewithavacuumtoolthatmakescontactwiththebottomsideofthemicrophone.Donotpullairoutoforblowairintothemicrophoneport.

• DonotuseexcessiveforcetoplacethemicrophoneonthePCB.REFLOWSOLDERForbestresults,thesolderingprofilemustbeinaccordancewiththerecommendationsofthemanufacturerofthesolderpasteusedtoattachtheMEMSmicrophonetothePCB.ItisrecommendedthatthesolderreflowprofilenotexceedthelimitconditionsspecifiedinFigure2andTable7.BOARDWASHWhenwashingthePCB,ensurethatwaterdoesnotmakecontactwiththemicrophoneport.Donotuseblow-offproceduresorultrasoniccleaning.

ICS-43434


OUTLINEDIMENSIONS

Figure15.6-TerminalChipArraySmallOutlineNoLeadCavity

3.50×2.65×0.98mmBodyDimensionsshowninmillimeters

Figure16.PackageMarkingSpecification(TopView)

ORDERINGGUIDEPART TEMPRANGE PACKAGE QUANTITY PACKAGINGICS-43434 −40°Cto+85°C 6-TerminalLGA_CAV 10,000 13”TapeandReel

EV_ICS-43434-FX FlexEvaluationBoard

PIN#1REFERENCE

CORNER

PIN#1REFERENCECORNER

0.98

0.75

0.23(REF)

2.65

3.50 3.20

R0.16

2.35

0.125

0.125

0.600(5X)

0.522(5X)

0.300

0.300

ø0.375

ø1.025

ø1.625

1.325

1.040

1.513

2.03

2.88

R0.125R0.240

YYXXX434

LOTTRACEABILITY CODE

PIN1INDICATIONPARTNUMBER

DATECODE

ICS-43434


REVISIONHISTORY

REVISIONDATE REVISION DESCRIPTION

4/26/2016 1.0 Initialversion

6/3/2016 1.1 UpdatedOrderingQuantity

8/29/2016 1.2 UpdatedHPMSNR,EINandDynamicRangevalue

ICS-43434


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