TDC7200 Time-to-Digital Converter for Time-of …

1 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand FEBRUARY2015 REVISEDMARCH2016 TDC7200 time -to-DigitalConverterfor Time-of -FlightApplicationsin LIDAR,Magnetostrictiveand Flow Meters11 Features1 Resolution:55 ps StandardDeviation:35 ps MeasurementRange: Mode1: 12 ns to 500 ns Mode2: 250 ns to 8 ms Low A (2 SPS) Supportsup to 5 STOPS ignals AutonomousMulti-CycleAveragingModefor LowPowerConsumption SupplyVoltage:2 V to V OperatingTemperature 40 C to 85 C SPI HostInterfacefor Configurationand RegisterAccess2 Applications FlowMeter:WaterMeter,Gas Meter,HeatMeter MagnetostrictivePosition/LevelSensing Time-of -Flightin Drones(LIDAR,SONAR),meteringequipmentand projectors HeatCostAllocators3 DescriptionTheTDC7200is a time -to-DigitalConverter(TDC)for ultrasonicsensingmeasurementssuchas waterflowmeter,gas flowmeter, TDC1000(ultrasonicanalog-front-end),the TDC7200can be a part of a completeTI ultrasonicsensingsolutionthatincludesthe MSP430,power,wireless,and DigitalConverter(TDC)performsthefunction of a stopwatchand measuresthe elapsedtime( Time-of -flightor TOF)

2 Betweena START pulseand up to five abilityto measurefromSTARTto multipleSTOP sgivesuserstheflexibilityto selectwhichSTOP pulseyieldsthe devicehas an the orderof TDC7200idealfor flowmeterapplications,wherezeroand low flow measurementsrequirehigh theAutonomousMulti-CycleAveragingMode,th e TDC7200can be optimizedforlow systempowerconsumption,makingit idealforbatterypoweredflow this mode,the hostcan go to sleepto savepower,and it can wakeupwheninterruptedby the TDCuponcompletionof (1)PARTNUMBERPACKAGEBODYSIZE(NOM) TDC7200 TSSOP(14) (1) For all availablepackages,see the orderableaddendumatthe end of the FEBRUARY2015 : TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryChangesfromRevisionC (August2015)to RevisionDPage AddedEN = Changed3818TO 318.

3 18 ChangesfromRevisionB (June2015)to RevisionCPage Changedthe datasheettitle From: TDC7200 time -to-DigitalConverterforWaterandGasFl owSensing,MagnetostrictivePositionSensin g,andLIDARM eteringApplicationsTo: TDC7200 time -to-DigitalConverterforTime-of-Fligh tapplicationsinLIDAR, (March2015)to RevisionBPage Changedthe datasheettitle From: TDC7200 time -to-DigitalConverterforWater,Gas,Hea tFlowMeteringApplicationsTo: TDC7200 time -to-DigitalConverterforWaterandGasFl owSensing,MagnetostrictivePositionSensin g, ChangedtheApplicationslist to include:"MagnetostrictivePositionSensing ", and "LIDARM etering"..1 ChangesfromOriginal(February2015)to RevisionAPage ChangedFrom:1-pageProductPreviewTo: Full FEBRUARY2015 REVISEDMARCH2016 ProductFolderLinks: TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporated5 for Level,Concentration,Flowand ProximitySensing4 TDC7200 SNAS647D FEBRUARY2015.

4 TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporated6 Pin Configurationand FunctionsPW Package14-PinTSSOPTop ViewPin TDCTRIGG2 OutputTriggeroutputsignalSTART3 InputSTART signalto TDCSTOP4 InputSTOP signalto TDCCLOCK5 InputClockInputto Not ConnectedGND7 GroundGroundINTB8 OutputInterruptto MCU,activelow (opendrain)DOUT9 OutputSPI DataOutputDIN10 InputSPI DataInputCSB11 InputSPI ChipSelect,activelowSCLK12 InputSPI clockVREG13 OutputLDOO utputterminalfor FEBRUARY2015 REVISEDMARCH2016 ProductFolderLinks: TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions.

5 Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)The algebraicconvention,wherebythe mostnegativevalueis a minimumand the mostpositivevalueis a maximum(3)All voltagesare with respectto ground, 25 C , VDD= ,GND= 0V (unlessotherwisenoted).(1)(2)(3)MINMAXUN ITVDDS upplyvoltage + |Voltagedifferential|betweenany two |Voltagedifferential|betweenany inputterminaland GNDor any pin 55mATAA mbienttemperature-40125 CTstgStoragetemperature 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 1000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101(2) 250(1)Specifiedby 25 C , VDD= ,GND= 0V (unlessotherwisenoted).

6 VDDVFCALIB_CLKF requency(Reference/CalibrationClock)1(1) 816 MHzDUTYCLOCKI nputclockduty cycle50%TIMINGREQUIREMENTS:MeasurementMo de1(1)T1 STARTSTOP_MinMinimumTimebetweenStartand StopSignal12nsT1 STOPSTOP_MinMinimumTimebetween2 StopSignals67nsT1 STARTSTOP_MaxMaximumtime bet. Startand StopSignal500nsT1 STOPSTOP_MaxMaximumtime bet. Startand last StopSignal500nsTIMINGREQUIREMENTS:Measur ement2(1)T2 STARTSTOP_MinMinimumTimebetweenStartand StopSignal2 tCLOCKsT2 STOPSTOP_MinMinimumTimebetween2 StopSignals2 tCLOCKsT2 STARTSTOP_MaxMaximumtime bet. Startand StopSignal(216-2) bet. Startand last StopSignal(216-2) tCLOCKsTIMINGREQUIREMENTS:ENABLEINPUTTRE NRiseTimefor EnableSignal(20%-80%)1 to 100nsTFENFall Timefor EnableSignal(20%-80%)1 to 100ns6 TDC7200 SNAS647D FEBRUARY2015 : TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporatedRecomme ndedOperatingConditions(continued)TA= 25 C , VDD= ,GND= 0V (unlessotherwisenoted).

7 MINNOMMAXUNITTIMINGREQUIREMENTS:START,ST OP,CLOCKTRST, TFSTM aximumrise, fall time for START,STOP signals(20%-80%)1nsTRXCLK, TFXCLKM aximumrise, fall time for externalCLOCK(20%-80%)1nsTIMINGREQUIREME NTS:TRIGGTTRIGSTARTT imefromTRIGto START5nsTEMPERATURETAA mbienttemperature 4085 CTJJ unctiontemperature 4085 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theICPackageThermalMetricsapplicationrep ort, (1) TDC7200 UNITPW [TSSOP]14 PINSR C/WR JC(top)Junction-to-case(top)thermalresis tance63R FEBRUARY2015 REVISEDMARCH2016 ProductFolderLinks: TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporated(1)Accu racyis definedas the systematicerrorin the outputsignal;the errorof the deviceexcludingnoise.(2)Specifiedby 25 C , VDD= V, GND= 0 V (unlessotherwisenoted).

8 PARAMETERTESTCONDITIONSMINTYPMAXUNITTDCC HARACTERISTICSLSBR esolutionSingleshot measurement55psTACC-2 Accuracy(Mode2)(1)CLOCK= 8 MHz28psTSTD-2 StandardDeviation(Mode2)Measuredtime = 100 s50psMeasuredtime = 1 s35psOUTPUTCHARACTERISTICS:TRIGG,INTB,DO UTVOHO utputvoltagehighIsource= -2 2 :ENABLE,START,STOP,CLOCK,DIN,CSB,SCLKCin Inputcapacitance(2)3pFPOWERCONSUMPTION(s eeMeasurementMode1 and MeasurementMode2)IshShutdowncurrentEN = AIQAQ uiescentCurrentAEN = HIGH; = HIGH;TDCOFF,ClockCounterrunning71 AIQCQ uiescentCurrentCEN = HIGH;measurementstopped,SPIcommunication only87 AIQDQ uiescentCurrentDEN = HIGH,TDCOFF,counterstopped,nocommunicati on50 :START,STOPINPUTS,CLOCKPWSTARTP ulsewidthfor StartSignal10nsPWSTOPP ulsewidthfor StopSignal10nsSERIALINTERFACETIMINGCHARA CTERISTICS(VDD= V, fSCLK= 20 MHz)(SeeFigure1)fSCLKSCLKF requency20 MHzt1 SCLK period50nst2 SCLKHighTime16nst3 SCLKLow Time16nst4 DIN setuptime4nst5 DIN hold time4nst6 CSBfall to SCLK rise6nst7 Last SCLK risingedgeto CSBrisingedge6nst8 Minimumpausetime (CSBhigh)40nst9 Clk fall to DOUTbus 25 C , VDD= V, GND= 0 V (unlessotherwisenoted).

9 PARAMETERTESTCONDITIONSMINTYPMAXUNITWAKE UP TIMETWAKEUP_PERIODT imeto be readyforMeasurementLSB settledvalue300 s8 TDC7200 SNAS647D FEBRUARY2015 : TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporatedFigure1 . SPI RegisterWrite:8 bit RegisterExampleVDD (V)Resolution [LSB] (ps) ( C)Resolution [LSB] (ps)-60-40-20020406080100515253545556575 859D007 VDD (V) Time-of -Flight at 250 ns (ns) ( C) Time-of -Flight at 250 ns (ns) (V) Time-of -Flight at 50 s ( s) ( C) Time-of -Flight at 50 s ( s) FEBRUARY2015 REVISEDMARCH2016 ProductFolderLinks: TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016, 25 C , VDD= V, GND= 0 V, CLOCK= 8 MHz,CALIBRATION2_PERIODS= 10, AVG_CYCLES= 1 Measurement,NUM_STOP= SingleSTOP,MeasurementMode2 (unlessotherwisenoted).Figure2. Time-of -Flight(TOF)vs. VDD(MeasurementMode2)Figure3.

10 TOFvs. Temperature(MeasurementMode2)Figure4. TOFvs. VDD(MeasurementMode1)Figure5. TOFvs. Temperature(MeasurementMode1)Figure6. Resolution(LSB)vs. VDDF igure7. Resolution(LSB)vs. TemperatureTemperature ( C)Operating Current ( A)405060708090100-402585D012 IQBIQCIQDT emperature ( C)Shutdown Current ( A) (V)Shutdown Current ( A) ( C)Operating Current [IQA] ( A)12601280130013201340136013801400-40258 5D011 VDD (V)Operating Current [IQA] ( A) (V)Operating Current ( A) FEBRUARY2015 : TDC7200 SubmitDocumentationFeedbackCopyright 2015 2016,TexasInstrumentsIncorporatedTypical Characteristics(continued)TA= 25 C , VDD= V, GND= 0 V, CLOCK= 8 MHz,CALIBRATION2_PERIODS= 10, AVG_CYCLES= 1 Measurement,NUM_STOP= SingleSTOP,MeasurementMode2 (unlessotherwisenoted).Figure8. OperatingCurrent(IQA)vs. VDDF igure9. OperatingCurrents(IQB,IQC,IQD)vs.