ADC080x 8-Bit, µP-Compatible, Analog-to-Digital Converters ...

1 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityADC0801,ADC0802,ADC0803,ADC080 4,ADC0805 SNOSBI1C NOVEMBER2009 REVISEDJUNE2015 ADC080x8-Bit, P-Compatible,Analog-to-DigitalConverters 1 Features3 DescriptionThe ADC0801,ADC0802,ADC0803,ADC0804,and1 CompatibleWith8080- P Derivatives NoADC0805devicesareCMOS8-bitsuccessiveIn terfacingLogicNeeded AccessTime135 nsapproximationconverters(ADC)that use a differential EasyInterfaceto All Microprocessors,or Operatespotentiometricladder similarto the a Stand-AloneDeivceTheseconvertersare designedto allowoperationwiththe NSC800andINS8080 Aderivativecontrol DifferentialAnalogVoltageInputsbus withTri-stateoutputlatchesdirectlydrivin gthe LogicInputsand memorylocationsTTL Voltage-LevelSpecificationsor I/O portsto the microprocessorand no interfacing (LM336)VoltageReferencelogicis needed. On-ChipClockGeneratorDifferentialanalogv oltageinputsallowincreasingthe 0-V to 5-V AnalogInputVoltageRangeWithcommon-modere jectionandoffsettingthe analogSingle5-V addition,the voltagereferenceinputcan be adjustedto allowencoding No ZeroAdjustRequiredany smalleranalogvoltagespanto the full 8 bits of Packageresolution.

2 20-PinMoldedChipCarrieror SmallOutlinePackageDeviceInformation(1) OperatesRatiometricallyor With5 VDC, VDC,PARTNUMBERPACKAGEBODYSIZE(NOM)or AnalogSpanAdjustedVoltageReferenceADC080 1,PDIP(20) Key SpecificationsPDIP(20) , Resolution:8 BitsADC0804 SOIC(20) TotalError: 1/4 LSB, 1/2 LSB and 1 LSB(1) For all availablepackages,see the orderableaddendumat ConversionTime:100 sthe end of the Applications OperatesWithAny 8-Bit P Processorsor as aStand-AloneDevice Interfaceto TempSensors,VoltageSources,andTransducer sTypicalApplicationSchematicADC0801 SpecifiedWith LSBA ccuracy1An IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand ,ADC0802,ADC0803,ADC0804,ADC0805 SNOSBI1C NOVEMBER2009 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and Orderable8 RevisionHistoryChangesfromRevisionB (Feburary2013)to RevisionCPage AddedPin Configurationand Functionssection,ESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,Applicationand Implementationsection,PowerSupplyRecomme ndationssection,Layoutsection,Deviceand DocumentationSupportsection,andMechanica l,Packaging,and 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks.

3 ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804, NOVEMBER2009 REVISEDJUNE20155 Pin Configurationand FunctionsNFHand DW Package20-PinPDIPand SOICTop ViewPin use internalclockgen with externalRC elements5 INTROI nterruptrequest6 VIN(+)IDifferentialanaloginput+7 VIN( )IDifferentialanaloginput 8A GNDIA naloggroundpin9 VREF/2 IReferencevoltageinputfor adjustmentto correctfull scalereading10D GNDID igitalgroundpin11DB7 ODatabit 712DB6 ODatabit 613DB5 ODatabit 514DB4 ODatabit 415DB3 ODatabit 316DB2 ODatabit 217DB1 ODatabit 118DB0(LSB)ODatabit 019 CLKRIRC timingresistorinputpin for internalclockgen20 VCC(or VREF)I+5V supplyvoltage,also upperreferenceinputto the ladderCopyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804,ADC0805 SNOSBI1C NOVEMBER2009 (unlessotherwisenoted)(1)(2)MINMAXUNITS upplyvoltage(VCC)(3) otherinputand outputs (VCC+ )Dual-In-LinePackage(plastic260 LeadTemperatureDual-In-LinePackage(ceram ic)300( soldering ,10 SurfaceMountPackageVaporPhase(60 seconds)215 Cseconds)Infrared(15 seconds)220 StorageTemperature 65150 PackageDissipationat TA= 25 C875mW(1)StressesbeyondthoselistedunderA bsoluteMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions.)

4 Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)If Military/Aerospacespecifieddevicesare required,contactthe SalesOffice/Distributorsfor availabilityand specifications.(3)A Zenerdiodeexists,internally,fromVCCto GNDand has a typicalbreakdownvoltageof 7 (ESD)ElectrostaticdischargeHumanbodymode l(HBM),per ANSI/ESDA/JEDECJS-001(1) 800V(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a (unlessotherwisenoted) + ,ADC0804 THERMALMETRIC(1)UNITNFH(PDIP)DW (SOIC)20 PINS20 PINSR C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom)thermalre sistance C/W(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC PackageThermalMetricsapplicationreport, 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804, NOVEMBER2009 (unlessotherwisenoted)(1)(2).

5 MINMAXUNITADC0804 LCJ 4085 ADC0801/02/03/05 LCN 4085 Temperature CADC0804 LCN070 ADC0802/04 LCWM070 Rangeof (1)AbsoluteMaximumRatingsindicatelimitsb eyondwhichdamageto the devicemay and AC electricalspecificationsdo notapplywhenoperatingthe devicebeyondits specifiedoperatingconditions.(2)All voltagesare measuredwith respectto GND, separateA GNDpointshouldalwaysbe wiredto the followingspecificationsapplyfor VCC= 5 VDC, TMIN TA TMAXand fCLK= 640 kHz (unlessotherwisespecified).PARAMETERTEST CONDITIONSMINTYPMAXUNITADC0801:TotalAdju stedError(1)WithFull-ScaleAdj. (SeeFull-Scale) 1/4 ADC0802:TotalUnadjustedVREF/2= 1/2 Error(1)ADC0803:TotalAdjustedError(1)Wit hFull-ScaleAdj. (SeeFull-Scale) 1/2 LSBADC0804:TotalUnadjustedErrorVREF/2= 1(1)ADC0805:TotalUnadjustedErrorVREF/2-N oConnection 1(1)ADC0801/02/03 InputResistance(Pin 9)k ADC0804(2) (+) or V( )(3)GND + Common-ModeErrorOverAnalogInputVoltageRa nge 1/16 1/8 LSBVCC=5 VDC 10%OverAllowedVIN(+) and VIN( )PowerSupplySensitivity 1/16 1/8 LSBV oltageRange(3)(1)Noneof theseADCsrequiresa zeroadjust(seeZeroError).

6 To obtainzerocodeat otheranaloginputvoltagesseeErrorsandRefe renceVoltageAdjustments.(2)The VREF/2 pin is the centerpointof a two-resistordividerconnectedfromVCCto all versionsof the ADC0801,ADC0802,ADC0803,and ADC0805,and in the ADC0804 LCJ,eachresistoris typically16 k . In all versionsof the ADC0804excepttheADC0804 LCJ,eachresistoris k .(3)For VIN( ) VIN(+)the digitaloutputcodewill be on-chipdiodesare tied to eachanaloginput(seeblockdiagram)whichwil l forwardconductfor analoginputvoltagesone diodedropbelowgroundor one diodedropgreaterthanthe ,duringtestingat low VCClevels( ),as high levelanaloginputs(5V) can causethis inputdiodeto conduct especiallyatelevatedtemperatures,and causeerrorsfor specallows50 mV forwardbias of as long as the analogVINdoesnot exceedthe supplyvoltageby morethan50 mV, the outputcodewill be absolute0 VDCto 5 VDCinputvoltagerangewill thereforerequirea minimumsupplyvoltageof ,initialtoleranceand ElectricalCharacteristicsThe followingspecificationsapplyfor VCC=5 VDCand TMIN TA TMAX(unlessotherwisespecified)PARAMETERT ESTCONDITIONSMINTYPMAXUNITfCLK= 640 kHz(1)103114 sTCConversionTimeSee(2)(1)66731/fCLKC lockFrequency1006401460kHzfCLKVCC= 5V(2)

7 ClockDutyCycle40%60%INTR tied to WR with CS = 0 VDC,CRConversionRatein Free-RunningMode87709708conv/sfCLK= 640 kHz(1)Accuracyis specifiedat fCLK= 640 higherclockfrequenciesaccuracycan lowerclockfrequencies,the duty cyclelimitscan be extendedso long as the minimumclockhigh time intervalor minimumclocklow time intervalis no less than275 ns.(2)Withan asynchronousstartpulse,up to 8 clockperiodsmay be requiredbeforethe internalclockphasesare properto startrequestis 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804,ADC0805 SNOSBI1C NOVEMBER2009 ElectricalCharacteristics(continued)The followingspecificationsapplyfor VCC=5 VDCand TMIN TA TMAX(unlessotherwisespecified)PARAMETERT ESTCONDITIONSMINTYPMAXUNITtW(WR)Widthof WR Input(StartPulseWidth)CS = 0 VDC(3)100 LAccessTime(DelayfromFallingEdgeof RD totACCCL= 100 pF135200 OutputDataValid)nst1H,Tri-StateControl(D elayfromRisingEdgeof RDCL= 10 pF, RL= 10k (SeeTri-State125200t0 Hto Hi-Z State)TestCircuitsand Waveforms)DelayfromFallingEdgeof WR or RD to ResettWI, tRI300450of INTRCINI nputCapacitanceof (DataBuffers) [Note.]

8 CLKIN (Pin 4) is the inputof a Schmitttriggercircuitand is thereforespecifiedseparately]VIN(1)Logic al 1 InputVoltage(ExceptPin 4 CLKIN)VCC= (0)Logical 0 InputVoltage(ExceptPin 4 CLKIN)VCC= (1)Logical 1 InputCurrent(All Inputs)VIN= 5 ADCIIN(0)Logical 0 InputCurrent(All Inputs)VIN= 0 VDC 1 ANDCLOCKRVT+CLKIN (Pin 4) (Pin 4) NegativeGoingThresholdVT (Pin 4) Hysteresis(VT+) (VT ) 0 CLKR OutputVoltageIO= 360 A, VCC= (0)VOUTL ogical 1 CLKR OutputVoltageIO= 360 A, VCC= (1)DATAOUTPUTSANDINTRDataOutputsIOUT= mA, VCC= 0 Output(0)VoltageINTRO utputIOUT= mA, VCC= 360 A, VCC= 1 OutputVoltage(1)IO= 10 A, VCC= 0 VDC 3 Tri-StateDisabledOutputLeakage(All DataIOUT ADCB uffers)VOUT= 5 VDC3 ISOURCVOUTS hortto GND,TA= 2 5 VCC, TA= 25 C916 POWERSUPPLYS upplyCurrentADC0801/02/03/04 640 kHz,VREF/2 = NC,ICC(IncludesLaddermATA= 25 C and CS = 5 VADC0804 )(3)The CS inputis assumedto bracketthe WR strobeinputand thereforetimingis dependenton the WR arbitrarilywidepulsewidthwill hold the converterin a resetmodeand the startof conversionis initiatedby the low to high transitionof the WR 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804, NOVEMBER2009 REVISEDJUNE2015 Figure1.

9 StartConversionNote:Readstrobemustoccur8 clockperiods(8/fCLK) afterassertionof interruptto specifyresetof OutputEnableand ResetWithINTRC opyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ProductFolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804,ADC0805 SNOSBI1C NOVEMBER2009 DelayFromFallingEdgeof RD to OutputDataFigure3. LogicInputThresholdVoltagevs SupplyVoltageValidvs LoadCapacitanceFigure5. CLKIN SchmittTrip Levelsvs SupplyVoltageFigure6. fCLKvs ClockCapacitorFigure7. Full-ScaleErrorvs ConversionTimeFigure8. Effectof UnadjustedOffsetErrorvs VREF/2 Voltage8 SubmitDocumentationFeedbackCopyright 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804, NOVEMBER2009 REVISEDJUNE2015 TypicalCharacteristics(continued)Figure1 0. PowerSupplyCurrentvs Temperature(1)Figure9. OutputCurrentvs TemperatureFigure11. LinearityErrorat LowVREF/2 Voltages(1)The VREF/2 pin is the centerpointof a two-resistordividerconnectedfromVCCto all versionsof the ADC0801,ADC0802,ADC0803,and ADC0805,and in the ADC0804 LCJ,eachresistoris typically16 k.

10 In all versionsof the ADC0804excepttheADC0804 LCJ,eachresistoris k .Copyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback9 ProductFolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804,ADC0805 SNOSBI1C NOVEMBER2009 WaveformsCL= 10 pFFigure12. RD to DataOutputFallingEdgeTestFigure13. RD to DataOutputFallingEdgeTestLoadConditionTi mingCL= 10 pFFigure14. RD to DataOutputRisingEdgeTestFigure15. RD to DataOutputRisingEdgeTestLoadConditionTim ing10 SubmitDocumentationFeedbackCopyright 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:ADC0801 ADC0802 ADC0803 ADC0804 ADC0805 ADC0801,ADC0802,ADC0803,ADC0804, NOVEMBER2009 REVISEDJUNE20158 ADC0801seriesare versatile8-Bit P compatiblegeneralpurposeADCconvertersope rateon treatedas a memorylocationor I/O portto a outputsare Tri-statelatchedwhichfacilitateinterfaci ngto micro-processorcontrolbus. The converteris designedwith a differentialpotentiometricladder,a circuitequivalentof the containsanalogswitchessequencedby functionaldiagramof the ADCconverteris showninFunctionalBlockDiagram.