000831 v1.2 Benchmark Wrist Datasheet - Valencellvalencell.com/wp-content/uploads/2016/06/000831-v1.2... · · 2017-04-07General design guidelines are covered along with references

1(17)

Document number Revision

000831 01.20 Prepared by Date

Jesse Tucker 2016-04-27

Contents responsible if other than preparer Remarks

Approved by

ValencellBenchmarkTMBiometricSensorSystemforWrist/Arm/ForeheadWearableDevices

1. ScopeThisdocumentistheDatasheetfortheBenchmark™sensorsystemfromValencell,Inc.Itdescribesthesensormoduleelectrical,mechanical,andcommunicationsinterfacefeatures.Generaldesignguidelinesarecoveredalongwithreferencestofurtherdetaileddocuments.

2. ReferenceDocumentation

ThefollowingdocumentsshouldbeusedinconjunctionwiththisDatasheet.

Table1:RelatedDocuments

Document Title Notes000828 Benchmark™wrist/arm/headintegrationguide 000638 TRS–PerformTek®InterfaceProtocolDocument 000832 Benchmark™WristFAQ

Benchmark™ PT-4100 Datasheet 2(17)


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BenchmarkTM(4/25/2016)Copyright©2016-2017byValencell,Inc.Page2USandInternationalPatentsGrantedandApplied

ValencellBenchmarkTMBiometricSensorSystemforWrist/Arm/ForeheadWearableDevices

Features • Opticalheartrate(HR),activity,calories,fitness• Accurate,continuousHRmonitoringevenduringintenseactivity

• Measureheartrate,fitnessassessments,running&cyclingcadence/distance/calories

• Smallsensorsystemsize

• <2.1mAsensorcurrentconsumptioninActivemode,<16uAinStandbymode

• SimpleUARTorI2Cinterface• ProductdesignguidanceandclinicallyvalidatedaccuracyofyourproductfromValencellbiometriclabs

Description

ThePerformTek®poweredBenchmark™isanewgenerationofbiometricmonitoringtechnologydevelopedbyValencell,Inc.ThismoduledesignhelpsyouquicklydevelopyourownPerformTek®basedbiometricproducts.Themoduledesignbringstogetherthebestavailablepartsofasuccessfulbiometricsensorsystem:emitter/detectorsensorelectronics,advancedalgorithmstoremovenoiseduringheavyactivity,accelerometertotrackactivity,andopticallensingtoprovidegoodopticalcouplingtotheuser’sskin.TheintegratedPerformTek®processorconvertssensordataintoassessmentssuchasHR,VO2,runningcadence,distance,andcaloriesburned.ThePerformTek®processorcommunicateswithyourhostprocessorusingasimpleUARTorI2Cinterfaceprotocol.Benchmark™is100%testedforopticalandsensorperformanceatthefactoryusingtestsystemsdevelopedbyValencell.Benchmark™allowsyoutoeasilyintegratehighlyintelligentbiometricsensorsintoyourwearableproductsforaccurateandmeaningfulfitnessandlifestyleuserexperiencesforyourcustomers.

Form Factors Technical Brief

• WearableDevices• SmartWatches• Lifestyle/ActivityBands• Wrist,ForearmandUpperArmBandsforSports• Helmets,Headbands

Feature Description

Operatingsupply 1.71-3.6VVDD,4.1-5VVLED<2.1mAaverageoperatingcurrent,<5uAstandbycurrent

Connector 0.4mmpitchHirose20pinFPCreceptacleDataInterface UARTorI2Coptions,POST,WAKEpinsModuleDimensions 14.5x19.5x3.25mmWeight 0.85grams



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TableofContents1. Scope....................................................................................................................................................1

2. ReferenceDocumentation...................................................................................................................1

3. KeyFeatures.........................................................................................................................................4

4. BlockDiagram/SystemOverview.......................................................................................................5

5. SystemElectricalSpecifications...........................................................................................................6

6. Optical-MechanicalSpecification.........................................................................................................7

7. SuggestedConnectionDiagram...........................................................................................................8

8. PinAssignments.................................................................................................................................10

9. ProcessorCommunicationInterface..................................................................................................14

10. OrderingGuide...............................................................................................................................15

11. IncomingQCModuleTestFixture..................................................................................................15

12. In-circuitPowerOnSelfTesting(POST)..........................................................................................15

13. ValencellProductDevelopmentDesignandTestServices............................................................16

14. ANoteonAccuracy........................................................................................................................16

15. ContactInformation.......................................................................................................................17

16. Statements.....................................................................................................................................17



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3. KeyFeatures

Table2:KeyFeatures

Feature DescriptionPower +1.71to+3.6VformoduleVDD,+4.1to+5VforVLED.

<2.1mAaveragecurrentforentiresensormodulesystemincontinuousHRmode.

InterfaceConnector

0.4mmpitch20positionflatflexlayoutdesignedforlowprofileFPCconnectivityforcompactdesigns.HirosereceptaclemountedonsensorPCB.Part#:BM20B(0.6)-20DS-0.4V(51)

FirmwareInterface 2-wire57.6kbpsUARTor2-wire100kHzI2CPowerOnSelf-Test(POST)statusindicatorWakefromStandbyinput

Dimensions PCBofsensorsystem:9.0x14.0x2.9mmOptomechaniclensassembly(includingPCBandlens):14.5x19.5x3.25mm

Optomechaniclensassembly

OpaquePC/ABSplastichousingwithclearPMMA/PClenses.Ultrasonicweldribformatingwithproductenclosure.Designedfor1.5mmprotrusionfrombottomshellofatypicalwristorarmproduct,minimalprotrusionintotheproductinteriordesign.



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4. BlockDiagram/SystemOverview

Figure1:Benchmark™FunctionalBlockDiagram

Theabovediagramcanbebrokenconceptuallyintothreesections:

1. Ontheleft,thesensormodulecircuitboardcontainsadigitalopticaldetectorsystem.ThisdetectorcontrolstheLEDsandconvertstheopticalsignalsreflectedfromtheuser’sskintodigitalformatandcommunicatesovertheinternalI2CbuswiththebuiltinPerformTek®processor.TheaccelerometerisalsoreadviatheinternalI2Cbusforactivitysignal.

2. ThemoduleboardcontainsthePerformTek®processorandallsensorcomponentsrequiredforHRandmotionmonitoring.ThePerformTek®processor,utilizingpatentprotectedtechnology,pollssensordataovertheinternalI2Cbusandconvertstherawmeasurementsintodataregistersofbiometricvalues(i.e.HeartRate,Cadence,VO2)andprocessesthosevaluesfurtherintohigherleveluserassessments(i.e.CaloriesBurned,Distance,VO2max,fitnesslevel).ThePerformTek®processorrunsValencell’spatentprotectedalgorithmstoconverttherawsignalstoaregisterarrayofbiometricvaluesandhighlevelassessments.ThesevaluesareavailableforreadingviatheUARTorI2Cfirmwareinterface.Inaddition,sensormodulediagnosticssuchassignalquality,errorcodes,andserialnumberIDareavailable.

3. ControllinesforinterfacingwiththesensormoduleincludeaPowerOnSelf-Test(POST),UARTorI2Ccommunicationinterface,andawake-from-standbyline(WAKE).ThehostprocessorcancontrolmuchofthefunctionalityofthesensormoduleviaasoftwareprotocolinterfaceovertheUARTorI2Cinterface.



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5. SystemElectricalSpecificationsPerformanceTables

Table3:RecommendedOperatingConditionsofSensorModule

Parameter Symbol Conditions Min Typ Max UnitsVDDSupplyVoltage VDD 1.71 3.3 3.6 VVLEDLEDSupplyVoltage

VLED 4.1 5.0 V

VDDandVLEDSupplyRippleVoltagerequiredforpropersensormoduleaccuracy

---- 10 mVpp

OperatingTemperature

T -10 25 50 oC

Table4:OperatingCharacteristicsofSensorSystem

Parameter Symbol Conditions Min Typ Max UnitsIDDOFFMode IOFF NoVDDsupplygivento

module 0 uA

IDDStandbyMode Istandby SystemisinStandbymode

16 uA

IDDActivelyMeasuring

Iactive SystemisinACTIVEmode

1.65 1.8 2.1 mA

IDDPulseCurrent Ipulse TBD mAStart-uptimebeforePOSTresponse

tPOST VDDabove1.8V 40 120 ms

RX,TX,POST,WAKEpinCurrentleakage

Ileak 1 uA

Table5:AbsoluteMaximumLimits

Parameter Conditions Min Typ Max UnitsOperatingTemperature -10 ---- 50 oCStorageTemperature -50 ---- 85 oCMaximumtotalcurrentthroughVDD 10 mAMaximumpulsedcurrentthroughVLED 500 mAMaximumpulsedcurrentthroughGND ---- 600 mAESDRating HumanBodyModel

MachineModelChargedDevice

Model

TBDTBDTBD

kVkVkV



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6. Optical-MechanicalSpecificationTheopticallenssystemisacriticalcomponentofthesensormodule,ensuringgoodopticalcouplingfromtheemittersandsensorstotheuser’sskin.Thisisnecessaryforaccuratemeasurement.ThelensframeisanovermoldedPC/ABSopaqueframeontoanopticalgradefilmlens.ThePCBandopto-mechanicallensistestedasanassemblyandshouldnotbedisassembled.

TheopticallenssystemisshownintheFigure2andFigure3below.

Figure2:Benchmark™SensorModuleDrawing



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Figure3:Benchmark™SensorModuleCrossSectionDrawing

Thereisanultrasonicweldribthatisdesignedalongtheinneredgeofthelensframe,asshowninFigure2andFigure3.Thisweldribisusedtoensureagoodsealusingultrasonicweldingtothecustomer’splasticenclosurebottom.Forultrasonicweldingdesignandprocessguidelinesaswellas3DCADmodelsofthesensormodule,pleasecontactValencell.

Themechanicaldesignhasbeenoptimizedtoreducetheimpactofthesensormoduleonindustrialdesign,especiallyintotalsensorheightwhenbuiltintothedevicehousing.Itisdesignedforeasyintegrationintothebottomshellofawristband,wristwatch,orarmbandwithpartofthemoduleprotrudingintotheinteriorofthewristproduct(~1mm),andpartprotrudingfromthebottomofthewristproduct(1.5mm).Thisdesignbalanceprovidesoptimalsensoraccuracywithminimaldisruptiontoothercomponentsoftheinterioroftheproductdesign.

7. SuggestedConnectionDiagramFigure4showsthesuggestedwiringconnectiondiagramforthesensorsystemforthePT-4100(UARTinterfaceversion).



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Figure4:Benchmark™ModuleSuggestedConnectionDiagramforPT-4100(UARTversion)

Figure5showsthesuggestedwiringconnectiondiagramforthesensorsystemforthePT-4110(I2Cinterfaceversion).



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Figure5:Benchmark™ModuleSuggestedConnectionDiagramforPT-4110(I2Cversionversion)

8. PinAssignments

Figure6:Benchmark™ModulePCBshowingX1connectorpin1physicallocation

Pin1marker



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Figure7:Benchmark™Moduleconnectorshowingpinout

PinAssignments

Table6belowprovidesabriefdescriptionofthepinassignmentstotheprocessor.Pinsnotlistedarenotconnectedinthecurrentdesignimplementation.

Table6:PinDescriptions

Pin Name I/O Description

1 GND Power Ground/ReferenceVoltage


3 VDD Power PowersupplytosensormodulesectionsotherthanLEDs.

4 VDD Power PowersupplytosensormodulesectionsotherthanLEDs.

5 VLED Power PowersupplytoLEDsonmodule.

6 VLED Power PowersupplytoLEDsonmodule.

Receptaclepartnumber(Receptaclesideismountedonsensormodule).Plugsidenotincluded.



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7 NC Donotconnect.

8 POST Output PowerOnSelfTestresult.GoestoVDD_Supplyvoltage

whenmoduleisproperlyinitializedandreadyfor

commands.





13 UART_RX

/I2C_SDA

I/O PT-4100(UARTversion):RXdatatosensorfromhost

PT-4110(I2Cversion):I2Cdataline,bidirectional

14 WAKE Input WakefromStandby.

15 UART_TX

/I2C_SCL

I/O PT-4100(UARTversion):TXdatafromsensortohost

PT-4110(I2Cversion):I2Cclockline,suppliedbyhost

16 NC Donotconnect.

17 NC Donotconnect.

18 NC Donotconnect.





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PinDetails

PIN1,2,9,10,11,12,19,20:GND

Thesepinsshouldbetieddirectlytoground.Thisgroundshouldbekeptasnoisefreeaspossiblebyconnectingdirectlytoagroundplaneifpossible.NotethatallgroundsonthesensormodulearetiedtogetherelectricallyinternallybythesensormodulePCB.Itmaynotbenecessarytoconnecttoallgroundsifspaceislimitedonaflexconnectorlayout.

PIN3,4:VDD

ThispinisaninputsupplyofVDDpowertothesensormodule.Thissupplyshouldbeasquietaspossibletoavoidnoiseonthemodule’ssensorsystem.Voltagerippleandnoiseonthissupplylinecanhurtsensorperformance.PleaseconsultwithValencellfordetailedsupplyrequirements.

PIN5,6:VLED

Thesepinsareusedtosupplypowertothemodule’sinternalLEDs.ThesuggestedrangeforsupplyingVLEDisshowninTable3.Belowthisrange,theLEDbrightnesswillbeinsufficienttomaintainaccuratemeasurements.Thesepinsshouldbeconnectedwithasufficientlywidetracetohandleburstsofpowerconsumptionofupto300mA,eventhoughthetypicalburstcurrentrequirementismuchlower.ThisLEDsupplyshouldbeasquietaspossibletoavoidnoiseonthemodule’ssensorsystem,asthiswillcauseinaccuratemeasurementsandassessments.

PIN8:POST(PowerOnSelf-Test)

OnceVDDpowerisapplied,theon-boardprocessorwilltrytoinitializeallcomponentsinternaltothemodule.Ifsuccessful,thispinwillgohigh(toVDD).Pleaseallowupto120msecforthisinitializationtotakeplace.Iftheinitializationisnotsuccessfulafterthistime,thispinwillstaylow(0V),andanydiagnosticinformationwillbestoredinthesensormodule’sregistersthatcanbereadviatheUART/I2C(refertoDocument000638-PerformTek®InterfaceProtocolDocumentforfurtherinformationondiagnosticregisters).

PIN13:UART_RX/SDAPIN15:UART_TX/SCL

ForBenchmarkTM,Pin13istheUART_RXpin,whichistheUARTreceivelinefordatasenttothemodulefromthehostprocessor.Pin15istheUART_TXpin,whichistheUARTtransmitlinefromthesensormoduletothehost.Theportsettingsare57.6kpbs,8,N,1.Thereisnohardwareorsoftwareflowcontrol.LogicHIGHvoltageofbothlinesisatVDD.ForinformationaboutUARTcommunications,pleaseseethe000638-PerformTek®InterfaceProtocolDocument.

ForthePT-4110module,Pin13istheI2C_SDAline,whichisthedatalineoftheI2Cinterface.Pin15istheI2C_SCLline,whichistheclocklineontheI2Cbus.Thesensormoduleactsasaslaveata100KHzbusspeed.ForinformationabouttheI2Ccommunications,pleaseseethe000638-PerformTek®InterfaceProtocolDocument.



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Notethat0Ohmresistorsshouldbeincludedbythecustomerwhenwiringtheselines.Thisfacilitatesanytestingand/ortroubleshootingservicesprovidedbyValencell.

NotethatfortheI2Ccommunicationoption,externalpull-upresistorsareneeded.Therearenopull-upsontheI2ClinesonthePT-4110module.

PIN14:(WAKE)

WAKEisaninputtothemoduleusedtobringthemoduleoutofStandbymode.RaisingthispinfromLowtoHighwillreturnthemoduletoanawakestate,readyforcommunication.

NotethatloweringWAKEdoesnotputthemoduleintostandbymode.StandbymodeisenteredviaacommandovertheUART/I2Cmodulecommunications.WAKEpinshouldbeloweredbeforeissuingthestandbycommand.

PIN7,16,17,18:NoConnect

Thesepinsarereservedforfutureuse.Donotconnectorgroundthesepins.

9. ProcessorCommunicationInterfaceTheProcessorcommunicationsinterfaceprotocolisdescribedinshortdetailbelow.Forafulldescriptionoftheinterfaceprotocol,pleasereferto:000638-TRS–PerformTek®InterfaceProtocolDocument.

Valencell’sPerformTek®processorinterfacesovereithera57.6kbps/8/N/1UARTconnectionwithanexternalhostprocessor,orinterfacesovera100kHz,7-bitI2ClineatVDDasaslave.Theslaveaddressis0x44.

Forfurtherdetailsonthecommunicationsinterfaces,pleaserefertotheValencell000638-PerformTek®InterfaceProtocolDocument.SimplepacketbasedcommandsareusedtoGetorSetmeasurementreadingsorparameters,ortocontrolthePerformTek®processor:Command:Get(0x08)

TheGETcommandissuesrequestsforparametersandmeasuredvaluesfromthePerformTekoutputregisters.Thepurposeoftheseregistervaluescanrangefromdeclarationsaboutthefirmwarefeaturestothemostrecentlycalculatedvalueforheartrate.FollowingisanexampleofaGETcommandthatrequeststhreevalues(heartrate,steprate,andcalories):

PerformTekStart

ByteCount

GETCommand

BPMRequest

SPMRequest

CALSRequest

0x44 0x04 0x08 0x20 0x30 0x42



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Command:Set(0x04)

TheSETcommandwritesconfigurationvaluestoPerformTekregisters.Thepurposeoftheseregistervaluescanrangefromdeclarationsaboutthecapabilityoftheapplication,toinformationneededbythealgorithmsabouttheuser.HereisanexampleofatypicalSETcommandthatsendsthreeuserinformationparameters(age,gender,andweight):

PerformTekStart

ByteCount

SETCommand

0x44 0x0A 0x04 ...

age 34.5yearsold gender female weight 140lbs.

... 0x10 0x01 0x9E 0x11 0x00 0x00 0x12 0x02 0x7B

OtherinterfacecommandscontrolPerformTekprocessoroperation.FullspecificationsoftheAPIareavailable.

10. OrderingGuideTable7:OrderingGuide

PartNumber DescriptionPT-4100 Benchmark™UARTInterfacePT-4110 Benchmark™I2CInterface

11. QCModuleTestFixtureBenchmark™modulesaretested100%atfactoryusingtheVIPERoptical/electricaltestfixture.InadditiontoValencell’soutgoingQCtesting,theseVIPERtestfixturesarealsoavailableforcustomerstouseaspartoftheirincominginspectionprocess.Thetestfixturesareavailableforpurchase–pleasecontactValencell,Inc.forpricing,availabilityandadditionaldetails.

12. In-circuitPowerOnSelfTesting(POST)In-circuitconfirmationoftheproperoperationoftheBenchmark™sensorsystemisprovidedbythemodule’sPowerOnSelf-Test(POST)pin.Seepinfunctiondescriptionsectionfordetails.AhostprocessorcanmonitorthePOSTpintogetconfirmationthattheBenchmark™modulehaspoweredonandinitializedproperly.

Theaxesoftheaccelerometerarestimulatedandcheckedforaresponsewithinbounds.IftheaccelerometerfailsanyofthePOSTtests,thenthePOSTregisterwillindicatethefailureandthedevicewillcontinuetooperate.Thisisusefulforverifyingaccelerometerhassurvivedanyultrasonicweldingprocess.



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13. ValencellProductDevelopmentDesignandTestServicesValencellhasyearsofexperiencehelpingcustomersbringaccuratebiometricwearablestomarket.Muchofthatexperiencehasbeencapturedinapplicationnotesandintheintegrationguide.FurtherdesignassistancecanbemadeavailablethroughValencell’sSupplyAgreementserviceprogram.Thissupportspansallstagesoftheproductdevelopmentprocess,fromproductconceptdevelopmentthroughmassproductionandmarketing.Formoredetails,contactValencell.

Goodproductperformancecomesfromgoodproductdesignandvalidatedwithasolidtestplan.Valencellcanassistwiththedesignandtestingofyourproduct.Ourengineershaveyearsofexperienceandmultipleproductlaunchestobacktheirknowledge.Examplesincludeassistingwithdesignoflow-noisepowersupplytothesensormodule;goodmechanicalplacementofthesensormodulewithintheproductbeingworn;alsoproductfit,comfort,andotherdesignconsiderationswhenincorporatingafitness/healthsensorsystem.

ValencellInc.hasaverysophisticatedexerciseandsportphysiologytestlabwhereproductsusingBenchmarkTMsystemscanbetestedforproperperformance.Ourlabcanvalidatetheaccuracyandperformanceofthecompleteproductdesignandprovideastatisticalanalysisofmultipleuserswithmultipleskintone/hairtype/bodymass/etc.Aspartofadesignfeedbackreport,suggestionstoimprovetheproductdesignarealsoincluded.

Formoreinformation,pleasecontactValencell.

14. ANoteonAccuracyValencellhasyearsofexperienceandsophisticatedexerciseandsportphysiologytestlabswhereproductsusingBenchmark™modulesaretestedforaccuracy.ThesetestresultscanbeseenintheformoftechnicalwhitepapersontheValencellwebsitehere:www.valencell.com/white-papers.

BiometricsensorsfromValencellhavebeentestedonthousandsoftestsubjectswiththestatisticalanalysisdoneinawaythatconformstomedicalandsportsjournalpublicationstandards.Testingiscarriedoutbothindoorsandoutdoorsundermanydifferentactivitieswithpoolsofsubjectsthathavedifferentskintones,weight,hair,fitnesslevels,etc.ValencellLabsislocatedintheU.S.wherethereisagooddiversityoftestsubjects.Thistypeoftestingisthebestandonlywaytoknowhowwellyourproductwillperformwhenintroducedintothemarket.



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15. ContactInformation

ForadditionalinformationpleasecontactBenchmark@valencell.comValencell,Inc.4601SixForksRd.Suite103Raleigh,NC27609www.valencell.com

16. Statements

PatentNotice:

Protectedbygrantedpatentsand/orpatentspending:www.valencell.com/patents

PerformTek®andthePerformTekdesignareregisteredtrademarksofValencell,Inc.andmaynotbeusedforanypurposewithouttheexpresspriorwrittenconsentofValencell,Inc.Patent:

Valencell,Inc.reservestherighttomakechangestoitsproductsorexampledesignsaspartofitsdevelopmentprogram.

Whileeveryefforthasbeentakentoensuretheaccuracyofthecontentsofthisdocument,Valencelldoesnotassumeanyresponsibilityforanyerrorsthatthisdocumentmaycontain,norforanypotentialdamagesorlossesarisingfromrelianceontheinformationcontainedherein.

PerformTek®technologyisnotdesignedorauthorizedforuseinlifesupport,medical,orsafetycriticalapplications.Valencellmakesnowarranty,representation,orguaranteeregardingthesuitabilityofitsproductsforanyparticularpurpose.Valencellassumesnoliabilityarisingoutoftheapplicationoruseofanyproductorcircuit,andspecificallydisclaimsanyandallliability,includingwithoutlimitationconsequentialorincidentaldamages.

NolicenseisgrantedorimpliedunderanypatentorotherrightsownedbyValencell,Inc.,bythepublicationortransferoftheinformationcontainedherein.

Unlessotherwisestated,wordsandlogosmarkedwith®or®aretrademarksregisteredorownedbyValencell,Inc.Otherproducts,servicesandnamesusedinthisdocumentmayhavebeentrademarkedbytheirrespectiveowners.