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INA223EVM User?셲 Guide and Software Tutorial

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1 Overview
2 INA223EVM Hardware Setup
3 INA223EVM Hardware Overview
4 INA223EVM SoftwareSetup
5 INA223EVM SoftwareOverview
6 INA223EVM Documentation
1 Hardware IncludedwithINA223EVM Kit
2 Hardware Setup
3 INA223 TestBoard BlockDiagram
4 SM-USB-DIG PlatformBlockDiagram
5 TypicalHardware TestConnectionson theINA223EVM
6 ConnectingtheUSB CabletotheSM-USB-DIG Platform
7 ConfirmationofSM-USB-DIG PlatformDriverInstallation
8 INA223EVM DefaultJumpers
9 TypicalFilterSetup
10 INA223 ShuntConfigurations
11 SoftwareInstallWindow
12 SoftwareLicenseAgreement
13 SoftwareInstallProgress
14 INA223EVM SoftwareInterface
15 CommunicationErrorwithSM-USB-DIG Platform
16 SettingtheA0 Address
17 ConfiguringtheOutputMode
18 ConfiguringtheBus VoltageGain
19 ConfiguringtheCurrentShuntVoltageGain
20 RegisterTable
21 Auto-Write,Power,and VoltageControls
22 Example Hardware Calculator
23 INA223EVM Board Schematic
24 INA223EVM PCB Component Layout
1 RelatedDocumentation
2 INA223EVM H1 PinConnections
3 INA223 TestBoard Jumper Functions
4 INA223 I2C AddressConfiguration
5 Power Gain Values
6 BillofMaterials
2 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June

User's Guide SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial INA223EVM Thisuser'sguidedescribesthecharacteristics,operation,and use oftheINA223EVM evaluationboard.It discusseshow to setup and configurethe softwareand hardware,and reviewsvariousaspectsof the program operation.This user'sguide also includesinformationregardingoperatingproceduresand input/outputconnections,an electricalschematic,printedcircuitboard(PCB) layoutdrawings,and a parts listfortheEVM. Throughoutthisdocument,thetermsevaluationboard,evaluationmodule,and EVM aresynonymous with theINA223EVM. Microsoft,Windows areregisteredtrademarksofMicrosoftCorporation. SPI isa trademarkofMotorolaInc,. I2C isa trademarkofNXP Semiconductors. 1SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

www.ti.com Overview

1 Overview

The INA223 isa voltageoutputdevicethatmonitorscurrent,bus voltage,and power ofa supplylineby sensinga voltagedropacrossa shunt.The INA223EVM isa platformforevaluatingtheperformanceof theINA223 undervarioussignal,shunt,and supplyconditions.Thisdocument givesa generaloverviewof theINA223EVM, and providesa generaldescriptionofthefeaturesand functionstobe consideredwhile usingthisevaluationmodule.

1.1 INA223EVM KitContents

The INA223EVM kitincludesthefollowingitems:

(1)INA223 PCB evaluationboard
(1)SM-USB-DIG PlatformPCB
(1)USB extendercable
(1)SM-USB-DIG connectorribboncable
(1)User’s guideCD-ROM Figure1 shows alloftheincludedhardware.ContacttheTexas InstrumentsProductInformationCenter nearestyou ifany component ismissing.Itishighlyrecommended thatyou checktheTIweb siteat http://www.ti.comtoverifythatyou have thelatestversionsoftherelatedsoftware. Figure1.Hardware IncludedwithINA223EVM Kit 3SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM Hardware Setup www.ti.com

1.2 RelatedDocumentation

The followingdocument providesinformationregardingTexas Instrumentsintegratedcircuitsused inthe assemblyoftheINA223EVM. Thisuser'sguideisavailablefromtheTIweb siteunderliteraturenumber SBOU125 .Any letterappended totheliteraturenumber correspondstothedocument revisionthatis currentatthetimeofthewritingofthisdocument.Newer revisionsmay be availablefromtheTIweb site athttp://www.ti.com,orcalltheTexas InstrumentsLiteratureResponse Centerat(800)477-8924orthe ProductInformationCenterat(972)644-5580.When ordering,identifythedocument by bothtitleand literaturenumber. Table1.RelatedDocumentation Document LiteratureNumber INA223 ProductData Sheet SBOS528 SM-USB-DIG PlatformUser’s Guide SBOU098

2 INA223EVM Hardware Setup

ThissectiondiscussestheoverallsystemsetupfortheINA223EVM. A PC runssoftwarethat communicateswiththeSM-USB-DIG Platform.Thisplatformgeneratestheanalogand digitalsignals used tocommunicatewiththeINA223 board.Connectorson theINA223 allowtheusertoconnecttothe systemundertestconditionswhere thepower,current,and voltagearemonitored. Figure2.Hardware Setup

4 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM Hardware Setup

2.1 Theory ofOperationforINA223 Hardware

A blockdiagramoftheINA223 test-boardhardwaresetupisshown inFigure3.The PCB provides connectionstotheI2C ™ and general-purposeinputsand outputs(GPIO)on theSM-USB-DIG Platform board.Italsoprovidesconnectionpointsforexternalconnectionstotheshuntvoltage. Figure3.INA223 TestBoard Block Diagram

2.2 SignalDefinitionsofH1 (10-PinMale Connector Socket)

Table2 shows thepinoutforthe10-pinconnectorsocketused tocommunicatebetween theINA223EVM and theSM-USB-DIG. Itshouldbe notedthattoissuecommands totheINA223 chip,theINA223EVM onlyuses H1 connnectorpins1 and 3 (I2C communicationlines),pin6 (VDUT),and pin8 (GND). Table2.INA223EVM H1 Pin Connections Pin on H1 Signal Description

1 I2C_SCL I2C clocksignal(SCL)

2 CTRL/MEAS4 (1) GPIO — Controloutputormeasure input

3 I2C_SDA1 I2C datasignal(SDA)

4 CTRL/MEAS5 (1) GPIO — Controloutputormeasure input

5 SPI_DOUT3 (1) SPI™ dataoutput(MOSI)

6 VDUT SwitchableDUT power supply:+3.3V,+5V, Hi-Z (disconnected).(2)

7 SPI_CLK (1) SPI clocksignal(SCLK)

8 GND Power return(GND)

9 SPI_CS1 (1) SPI chipselectsignal(CS)

10 SPI_DIN1(1) SPI datainput(MISO)

(1) Thissignalisnotused on theINA223EVM. (2) When VDUT isHi-Z,alldigitalinputsand outputs(I/O)areHi-Zas well. 5SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

/c180 Buffer and Level Translators 3.3-V Regulator +3.3 V USB +5.0 V To Computer and Power Supplies To Test Board USB +5.0 V +3.3 V SM-USB-DIG VDUT (Hi-Z, 3.3 V, or 5 V) TUSB3210

8052 Microcontroller

INA223EVM Hardware Setup www.ti.com

2.3 Theory ofOperationforSM-USB-DIG Platform

Figure4 shows theblockdiagramfortheSM-USB-DIG Platform.Thisplatformisa general-purposedata acquisitionsystemthatisused on severaldifferentTexas Instrumentsevaluationmodules.The detailsof itsoperationareincludedina separatedocument (SBOU098 ).The blockdiagramshown inFigure4 is givenas a briefoverviewoftheSM-USB-DIG Platform. Figure4.SM-USB-DIG PlatformBlock Diagram The brainoftheSM-USB-DIG PlatformistheTUSB3210, an 8052 microcontrollerthathas a built-inUSB interface.The microcontrollerreceivesinformationfromthehostcomputerthatisinterpretedintopower, I2C, SPI,and otherdigitalI/Opatterns.DuringthedigitalI/Otransaction,themicrocontrollerreadsthe responseofany deviceconnectedtotheI/Ointerface.The responsefromthedeviceissentback tothe PC where itisinterpretedby thehostcomputer.

6 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM Hardware Overview

3 INA223EVM Hardware Overview

The INA223EVM hardwaresetupinvolvesconnectingthetwo EVM PCBs together,applyingpower, connectingtheUSB cable,and settingthejumpers.Thissectiondescribesthedetailsofthisprocedure.

3.1 ElectrostaticDischargeWarning

Many ofthecomponents on theINA223EVM aresusceptibletodamage by electrostaticdischarge(ESD). CustomersareadvisedtoobserveproperESD handlingprecautionswhen unpackingand handlingthe EVM, includingtheuse ofa groundedwriststrapatan approvedESD workstation.

3.2 Connecting theHardware

To connecttheINA223 testboardand theSM-USB-DIG Platformtogether,gentlyslidethemale and femaleends ofthe10-pinconnectorstogether.Make surethatthetwo connectorsarecompletelypushed together;looseconnectionsmay cause intermittentoperation.

3.3 Connecting Power

AftertheEVM and SM-USB-DIG arejoined,as shown inFigure5,connectthedesiredVBUS and shunt configurationtobe measured.Typically,setupinvolvesa high-orlow-sideloadand a shuntresistor acrossVIN+ and VIN–.The example inFigure5 representsa testscenariowitha low-sideshuntattached. The power supplyforVBUS isnotincludedwiththekitand issuppliedby thecustomer;thespecificvoltage needed depends on yourtestingneeds. Figure5.TypicalHardware TestConnections on theINA223EVM 7SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM Hardware Overview www.ti.com

3.4 Connecting theUSB Cable totheSM-USB-DIG Platform

Figure6 shows theUSB connectiontotheSM-USB-DIG Platformboard.The firsttimeyou connecttothe PC, thecomputertypicallyrespondswitha Found New Hardware,USB Devicepop-upwindow.The pop- up window thenlikelychanges toFound New Hardware,USB Human InterfaceDevice.The SM-USB-DIG Platformuses thehuman interfacedevicedriversthatarepartofwithMicrosoft® Windows ® operating systems. Figure6.Connecting theUSB Cable totheSM-USB-DIG Platform Insome cases,theWindows Add Hardware Wizardisshown.Ifthispromptappears,allowthesystem devicemanager toinstallthehuman interfacedriversby clickingYes when requestedtoinstalldrivers. Windows confirmsinstallationofthedriverswiththemessage shown inFigure7.Thispop-upindicates thatthedeviceisreadytobe used. Figure7.ConfirmationofSM-USB-DIG PlatformDriverInstallation

8 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM Hardware Overview

3.5 INA223EVM DefaultJumper Settings

Figure8 shows thedefaultjumperconfigurationfortheINA223EVM. You may want tochange some ofthe jumperson theINA223EVM tomatch yourspecificconfiguration.Forexample,you may wishtoseta specificI2C addressby configuringjumper1 (JMP1) and jumper2 (JMP2). Figure8.INA223EVM DefaultJumpers Jumper 3 (JMP3) on theINA223EVM istypicallysettotheinternal(INT)position.When settotheINT position,thedevicesupplyvoltageisgeneratedand controlledfromtheSM-USB-DIG Platform.When this jumperissettotheexternal(EXT)position,INA223 pin4 (VS)connectstoterminalstripT1 and can be powered froman externalsupply. JMP1 and JMP2 controltheI2C addresspinfortheINA223;thesejumperssettheaddressforA0 toeither high,low,SCL, orSDA. Make suretoconnectonlyone jumperata timefortheaddresscontrol(for example,ifJMP1 isconnected,do notconnectJMP2, and viceversa).Failuretoproperlyconnect jumperscan cause shortsorinterruptionsinthecommunicationlines.Formore informationon theINA223 addressing,consulttheINA223 datasheet(SBOS528 ). Table3 summarizesthefunctionoftheINA223 testboardjumpers.Formost applications,allthejumpers shouldbe leftintheirdefaultconfigurations. Table3.INA223 TestBoard Jumper Functions Jumper Default Description JMP1 Open These jumpersselecttheI2C AO addressselectionforA0.Four separateI2C addressescan be selected,dependingon whetherJMP2JMP2 GND issettohighorlow,orJMP1 issettoSDA orSCL. JMP3 INT ThisjumperselectswhethertheVS pinon theINA223 isconnectedto thedigitalpower-supplysignal(VDUT) generatedfromtheSM-USB- DIG Platform(INTposition),orwhethertheVDUT pinisconnectedto terminalT1,thusallowingforan externalsupplytopower thedigital circuitry(EXT position). 9SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM Hardware Overview www.ti.com

3.6 INA223EVM Hardware

Thissectiondescribessome ofthehardwarefeaturespresenton theINA223EVM board.

3.6.1 JMP3: I2C versus ControlSetting

The JMP3 settingdeterminesiftheINA223 ispowered fromtheSM-USB-DIG platformoran external power supply.IfJMP3 issettotheINT position,theVS pinisconnectedtotheswitchableVDUT signal generatedfromtheSM-USB-DIG Platform.Thisvoltagecan be settoeither3.3V or5 V,dependingon how itisconfiguredinthesoftware. When JMP3 issettotheEXT position,an externalsupplyconnectedtoterminalT1 must be used to providethedigitalsupplyvoltagefortheINA223.

3.6.2 JMP1 and JMP2: I2C Address Hardware Setting(A0)

JMP1 and JMP2 areused tosetthehardwaresettingfortheA0 I2C addresspinon theINA223.Using JMP2, theA0 addresscan be settoeithera logic'1'ora logic'0'.UsingJMP1, theA0 addresscan be set toeithertheSCL orSDA communicationline.Make suretoonlyhave a jumperinstalledon JMP1 or JMP2. Failuretokeep theselinesseparatecan leadtoboardshortsand problemswiththeI2C communicationlines.See theI2C AddressSelectionsectionforhow toconfiguretheINA223EVM softwaretomatch theJMP1 and JMP2 hardwaresettings.

3.6.3 ExternalI2C linesand TerminalBlock T3

The I2C communicationlineson theINA223EVM aretiedtotwo sources:The internalI2C communication linesfromtheSM-USB-DIG Platformand terminalblockT3.IfexternalsignalsseparatefromtheSM-USB- DIG aretobe used,simplydisconnecttheSM-USB-DIG fromtheINA223 boardand connecttoexternal SDA, SCL, and GND lines.Also,remember toapplyan externalVS thatiscompatiblewiththeI2C communicationdevicebeingused. CAUTION Failureto disconnectthe SM-USB-DIG Platformwhile using externalI2C communication can cause damage to the SM-USB-DIG or external communicationdevice.

10 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

0.1 F/c109

V (Supply Voltage)S Power Supply (0V to 26V) R 4.7k PULLUP /c87 VIN/c45 VIN+ VOUT SCL SDA

0 Resistors/c87

www.ti.com INA223EVM Hardware Overview

3.6.4 VIN+ and VIN– InputFilter(R4,R3, and C3)

The INA223EVM has an optionalinputfilterlocatedbetween theterminalblockT2 and theINA223 input pins.Thisfilterhelpstoremove high-frequencynoisefromtheVIN+ and VIN– inputs.The EVM shipswith thisfilternotused.C3 istypicallyunpopulatedand R3 and R4 have 0-Ω resistorsinstalled.Iffilteringis desired,limitthevalueforR3 and R4 to10-Ω orless.Figure9 shows thetypicalsetupthatis recommended forbasicINA223 evaluation.See theINA223 datasheet(SBOS528 )formore details. Figure9.TypicalFilterSetup

3.6.5 Shunt MonitorConfigurationand TerminalBlock T2

The INA223 istypicallyused ina high-sideconfiguration,as shown inFigure10.The T2 terminalblock includestheconnectionsforVIN+ and VIN–,whichshouldbe connecteddirectlyacrosstheshuntresistor. Dependingon theuser’s needs,eitheroftheseconfigurationsmay be used withoutany changes needed totheINA223EVM boardorsoftware. Figure10.INA223 Shunt Configurations 11SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM SoftwareSetup www.ti.com

4 INA223EVM SoftwareSetup

Thissectiondiscusseshow toinstalltheINA223 software.

4.1 OperatingSystems forINA223EVM Software

The INA223 softwarehas been testedon theMicrosoftWindows XP operatingsystem(OS) withUnited Statesand European regionalsettings.Thissoftwareshouldalsofunctionon otherWindows operating systems.

4.2 INA223 SoftwareInstallation

The INA223EVM softwareisincludedon theCD thatisshippedwiththeEVM kit.Itisalsoavailable throughtheINA223EVM productfolderon theTIweb site.To downloadthesoftwaretoyoursystem, insertthediscintoan availableCD-ROM drive.Navigatetothedrivecontentsand open theINA223EVM softwarefolder.Locatethecompressed file(INA223EVM.zip)and open it.ExtracttheINA223EVM files intoa folderlabeledINA223EVM (forexample,C:\\INA223EVM) on yourharddrive. Afterthefilesareextracted,navigatetotheINA223EVM folderyou createdon yourharddrive.Locatethe setup.exefileand runittostarttheinstallation.The INA223 softwareinstallerfileopens tobeginthe installationprocess,as shown inFigure11. Figure11.SoftwareInstallWindow

12 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM SoftwareSetup Aftertheinstallbegins,theuserisgiventhechoiceofselectingthedirectorytoinstalltheprogram,usually defaultingtoC:\\ProgramFiles\\INA223\\and C:\\ProgramFiles\\NationalInstruments\\.Followingthisoption, two licenseagreementsarepresentedthatmust be accepted,as shown inFigure12. Figure12.SoftwareLicenseAgreement AfteracceptingtheTexas Instrumentsand NationalInstrumentslicenseagreements,theprogressbar opens and shows theinstallationofthesoftware,as shown inFigure13.Aftertheinstallationprocessis complete,clickFinish. Figure13.SoftwareInstallProgress 13SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM SoftwareOverview www.ti.com

5 INA223EVM SoftwareOverview

Thissectiondescribeshow touse theINA223EVM software.The softwareoperationcontainsa two-step process:configurationand operation.

5.1 StartingtheINA223EVM Software

To starttheINA223 software,go totheWindows Startmenu, selectAllPrograms,and thenselectthe INA223EVM program.Figure14 illustrateshow thesoftwareshouldappeariftheINA223EVM is functioningproperly. Figure14.INA223EVM SoftwareInterface Figure15 shows theerrorthatappearsifthecomputercannotcommunicatewiththeEVM. Intheevent you receivethiserror,firstensurethattheUSB cableisproperlyconnectedon bothends.Thiserrorcan alsooccurifyou connecttheUSB cabletoyourPC beforetheSM-USB-DIG Platformisconnectedtothe EVM board.Anotherpossiblesourceforthiserrorisa problemwiththecomputerUSB human interface devicedriver.Make surethatthedeviceisrecognizedwhen theUSB cableispluggedin,indicatedby a Windows-generatedconfirmationsound. Figure15.Communication ErrorwithSM-USB-DIG Platform

14 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM SoftwareOverview

5.2 ConfiguringtheINA223 Software

The nextstepsofthisuser’s guidedescribeshow toconfigurethesoftwareand hardwarefordifferent configurations.

5.2.1 I2C Address Selection

The INA223 has a flexibleI2C addressconfigurationthatallowsformultipledevicestobe on thesame I2C lines.By moving theA0 addresson jumpersJMP1 and JMP2 toeitherGND, VS, SDA orSCL, theINA223 can be changed tofourdifferentI2C addresses,as shown inTable4. Table4.INA223 I2C Address Configuration A0 Address GND 1000000 VS 1000001 SDA 1000010 SCL 1000011 Figure16 shows how toconfiguretheI2C addresses.Clickon theI2C AddressSelectbutton(shown inthe redbox)toselecthow thehardwareisconfiguredon theEVM. Ifthecorrectaddressisnotselected,the INA223 cannotcommunicatewiththesoftware. Figure16.SettingtheA0 Address 15SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM SoftwareOverview www.ti.com

5.2.2 Output Mode

The outputmode configurationallowstheusertotogglebetween differentoutputsignalsgeneratedfrom theINA223,and isshown intheredbox ofFigure17.The fouroptionsavailableforoutputmode are: ShuntVoltage,Bus Voltage,SupplyPower,and Load Power. Figure17.ConfiguringtheOutput Mode The two power outputmodes oftheINA223EVM isused toselectwhetherthesignalrepresentingthe power beingsuppliedby thepower supplyorthepower beingconsumed by theloadismade availableat theoutputpin.When theSupplyPower optionisselected,theVBUS measurement istakeninternallyatthe VIN+ pinoftheINA223 and combined withtheVSHUNT measurement tocalculatethepower beingsupplied. The Load Power optionoperatesina similarmanner totheSupplyPower option,exceptthattheVBUS measurement istakeninternallyattheVIN– pinoftheINA223.The power beingconsumeed by theload isfoundby takingtheVBUS measurement fromtheVIN– pin.The SupplyPower and Load Power results areverysimilarwiththeexceptionbeingthattheLoad Power optionremoves thepower beingdissipated acrosstheshuntresistorfromtheresult.Athighcurrentshuntgains,thedifferencesbetween Load Power and SupplyPower arenegligible.Atlowcurrentshuntgains,thepower dissipatedacrossthesense resistorcan resultina noticeabledifferencebetween thesetwo results.

16 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM SoftwareOverview Itisimportanttonotethatvalidbus voltageand shuntvoltagemeasurements must be withinthelinear rangeofthedeviceinorderfortheINA223 tocorrectlycalculatepower usingEquation1. POWER = VOUT /PowerGAIN × R SHUNT (1) Where VOUT iscalculatedbased on Equation2: VOUT = VCM × VSENSE × PowerGAIN (2) and PowerGAIN valuseareshown inTable5. Table5.Power Gain Values Bus VoltageGain Shunt VoltageGain Power GAIN 1/10 20 0.667 1/10 128 4.267 1/10 300 10 1/5 20 1.333 1/5 128 8.533 1/5 300 20 2/5 20 2.667 2/5 128 17.067 2/5 300 40 The remainingtwo configurations,Bus Voltageand ShuntVoltage,measure thebus voltagesattheVIN- pinand theshuntvoltagedevelopeddirectlyacrosstheshuntresistor,respectively.The actualoutput voltageofeithermeasurement isbased on theinputvoltagemultipliedby thecorrespondinggainsettings, NOTE: Formaximum accuracy,selecta gainthatgivesa full-scalevoltage,justbelowthemaximum outputvoltage. 17SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM SoftwareOverview www.ti.com

5.2.3 Bus VoltageGain

The Bus VoltageGain fieldallowstheusertoselectthegainthatthebus voltageismultipliedby.Itis importanttochoose a valuethatplacestheoutputvoltagewithinthelinearoutputrangeofthedevice. Failuretoensurethattheoutputsarewithinthelinearrangeofthedevicecan resultininaccurateresults. Figure18.ConfiguringtheBus VoltageGain

5.2.4 CurrentShunt VoltageGain

The CurrentShuntVoltageGain fieldisused toselectthedeviceshuntvoltagegainsetting.Itisimportant tochoose a valuethatplacestheoutputvoltagewithinthelinearoutputrangeofthedevice.Failureto ensurethattheoutputsarewithinthelinearrangeofthedevicecan resultininaccurateresults. Figure19.ConfiguringtheCurrentShunt VoltageGain

18 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM SoftwareOverview

5.3 Using theINA223 Software

5.3.1 RegisterTable

The registertable(shown by theredbox inFigure20)containsinformationon theinternalregistersofthe INA223 registers.Each registercan be changed on a bit-by-bitbasistoallowtheusertohave totalcontrol ofthepart,outsidethegeneralfunctionalityofthegraphicaluserinterface(GUI).Most ofthisfunctionality isdisplayedintheConfigurationRegister;however,by selectingtheappropriateregisterand clickingon theHelpw Reg button(shown inFigure20),theindividualuse ofeach bitineach registercan be diagnosed. Figure20.RegisterTable 19SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM SoftwareOverview www.ti.com

5.3.2 Auto-Writeand DVDD Voltage

The INA223EVM softwareallowsforcustomizationoftheboardlevelvoltage,regulatedby theSM-USB- DIG.Selecteither+3.3V or+5V fortheoperatingvoltageofthechip,as shown intheupperredbox in Figure21. Figure21.Auto-Write,Power, and VoltageControls The softwarealsoincludesan Auto-Writefeature(asshown inthelowerredbox inFigure21).Auto-Write isenabledby default,and automaticallyupdatestheregistertablewhenever a change ismade. When this featureisenabled,theWriteallReg buttonserveslittlepurpose,and isonlyused as an alternativefor when thisbuttonisdisabled.

20 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

www.ti.com INA223EVM SoftwareOverview

5.3.3 Example Hardware Calculator

The Example Hardware CalculatortaballowstheusertosimulatetheanalogresultsoftheINA223EVM. By adjustingthecontrolson thispage,and enteringinputsforVin+(V),Vin-(V),and Rshunt,the approximatevaluesforVout(V)and Power (W) can be estimated.Note thattheappropriateoutputmode must be selectedtoensureaccurateresults,and thatno limitationsofthedeviceareviolatedintheError field. Thiscalculatorisused tohelpensurethatthephysicaloutputand settingsareoperatingcorrectly.The EVM and devicedigitalcommunicationinterfaceareonlydesignedtoconfigurethedevicesettings.There isno analogreadbackavailablewiththisEVM. Thismeans thattheoutputvoltagesshown on this calculatortabinthesoftwarearecalculatedresultsbased on theparametersenteredand not representativeofthemeasurements oftheactualdevice. Figure22.Example Hardware Calculator 21SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM Documentation www.ti.com

6 INA223EVM Documentation

Thissectioncontainsthecompletebillofmaterials,schematicdiagram,and PCB layoutforthe INA223EVM. DocumentationinformationfortheSM-USB-DIG Platformcan be foundintheSM-USB-DIG PlatformUser’s Guide (SBOU058 ),availableattheTIweb siteathttp://www.ti.com.

6.1 BillofMaterials

Table6 liststhebillofmaterialsfortheINA223 TestBoard. Table6.BillofMaterials Digikey Manufacturer Ref Des Description Manufacturer PartNumber PartNumber R1, R2 RES 10K OHM 1/10W 5% 0603 SMD StackpoleElectronics RMCF0603JT10K0CT-ND RMCF0603JT10K0 R5 RES 300 OHM 1/10W 5% 0603 SMD Panasonic P300GCT-ND ERJ-3GEYJ301V R3, R4 RES 0.0OHM 1/10W 0603 SMD StackpoleElectronics RMCF0603ZT0R00CT-ND RMCF0603ZT0R00 C2 CAP TANTALUM 4.7UF 35V 10% SM AVX Corp 478-1717-1-ND TAJC475K035RNJ C3, C4 CAP CER .10UF 25V X7R 10% 0603 TDK Corp 445-1316-1-ND C1608X7R1E104K D1 LED GREEN WIDE ANGLE 0603 SMD Panasonic P14140CT-ND LNJ3W0C83RA U1 INA223 Texas Instruments Jumpers All CONN HEADER 50POS .100"SGL GOLD Samtec SAM1029-50-ND TSW-150-07-G-S TestPointsAll PC TEST POINT COMPACT SMT KeystoneElectronics 5016KCT-ND 5016 T3 3BlockTerminal3.5mm On Shore TechnologyInc ED2636-ND OSTTE030161 T1,T2 2BlockTerminal3.5mm On Shore TechnologyInc ED1514-ND ED555/2DS Bumpons BUMPON .50X.14BLACK 3M SJ5012-0-ND SJ-5012(BLACK) H1 CONN SOCKET RT ANG 1POS .050 Mill-MaxManufacturing ED8850-ND 851-93-10-20-001000

22 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

*+, *-.) '/01 ' 22 34 3345 '3361 $ 0&' 0#&' * + 8 9 7 . 0&' 0#&' 0&' 0#&' $<& $<& 7 ' =;& =;& !=;& 7-) www.ti.com INA223EVM Documentation

6.2 Schematic

Figure23 shows theschematicfortheINA223EVM board. Figure23.INA223EVM Board Schematic 23SBOU125 –June 2012 INA223EVM User’s Guide and SoftwareTutorial SubmitDocumentationFeedback Copyright© 2012,Texas InstrumentsIncorporated

INA223EVM Documentation www.ti.com

6.3 PCB Component Layout

Figure24 shows thelayoutofthecomponents fortheINA223EVM PCB. Figure24.INA223EVM PCB Component Layout

24 INA223EVM User’s Guide and SoftwareTutorial SBOU125 –June 2012

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Product Information

5016 specifications and overview.

Summary

INA223EVM User?셲 Guide and Software Tutorial

Description

INA223EVM User?셲 Guide and Software Tutorial

Source title 5016 Datasheet(PDF) - Texas Instruments

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