CA3162_02中文资料
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1®April2002CA3162
A/DConvertersfor3-DigitDisplayFeatures•DualSlopeA/DConversion•MultiplexedBCDDisplay•UltraStableInternalBandGapVoltageReference•CapableofReading99mVBelowGroundwithSingleSupply•DifferentialInput•InternalTiming-NoExternalClockRequired•ChoiceofLowSpeed(4Hz)orHighSpeed(96Hz)ConversionRate•“Hold”InhibitsConversionbutMaintainsDelay•OverrangeIndication-“EEE”forReadingGreaterthan+999mV,“-”forReadingMoreNegativethan-99mVWhenUsedWithCA3161EDescriptionTheCA3162EandCA3162AEareI2LmonolithicA/Dconvertersthatprovidea3digitmultiplexedBCDoutput.TheyareusedwiththeCA3161EBCD-to-Seven-SegmentDecoder/Driverandaminimumofexternalpartstoimple-mentacomplete3-digitdisplay.TheCA3162AEisidenticaltotheCA3162Eexceptforanextendedoperatingtempera-turerange.
TheCA3161EisdescribedintheDisplayDriverssectionofthisdatabook.
OrderingInformation
PinoutCA3162(PDIP)TOPVIEW
PARTNUMBERTEMP.RANGE(oC)PACKAGEPKG.NO.
CA3162E0to7016LdPDIPE16.3
14151691312111012345
76
8
2120NSDMSDLSDHOLD/ZEROADJGND23V+GAINADJINTEGRATINGHIGHINPUTLOWINPUTZEROADJ22
CAPBYPASS
BCDOUTPUTSDIGITSELECTOUTPUTSBCDOUTPUTS
FN1080.3CAUTION:Thesedevicesaresensitivetoelectrostaticdischarge;followproperICHandlingProcedures.
1-888-INTERSILor321-724-7143|Intersil(anddesign)isaregisteredtrademarkofIntersilAmericasInc.Copyright©IntersilAmericasInc.2002.AllRightsReserved
元器件交易网www.cecb2b.comFunctionalBlockDiagramCONTROLLOGICCOUNTERSANDMULTIPLEXDIGIT
DRIVE
BANDGAPREFERENCE
REFERENCE
CURRENTGENERATOR
HOLD/BYPASSGATESOSC
÷2048÷
96
V/ICONVERTERTHRESHOLDDET.
MSD=MOSTSIGNIFICANTDIGITNSD=NEXTSIGNIFICANTDIGITLSD=LEASTSIGNIFICANTDIGIT
†
GAINADJ
GNDV+21202223HIGHINPUTLOWINPUTZEROADJV+V+BCDOUTPUTSINTEGRATINGCAP10118912121516143453456713
DIGITSELECT=MSD=LSD=NSD
CONVERSIONCONTROL
OUTPUTS†
CA3162元器件交易网www.cecb2b.comAbsoluteMaximumRatingsThermalInformationDCSupplyVoltage(BetweenPins7and14)...............+7VInputVoltage(Pin10or11toGround)...................±15VOperatingConditionsTemperatureRangeCA3162E.....................................0to75oCThermalResistance(Typical,Note1)θJA(oC/W)PDIPPackage.............................90MaximumJunctionTemperature.......................150oCMaximumStorageTemperatureRange..........-65oCto150oCMaximumLeadTemperature(Soldering10s).............300oC
CAUTION:Stressesabovethoselistedin“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thisisastressonlyratingandoperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationalsectionsofthisspecificationisnotimplied.
NOTE:1.θJAismeasuredwiththecomponentmountedonaloweffectivethermalconductivitytestboardinfreeair.SeeTechBriefTB379for
details..
ElectricalSpecificationsTA=25oC,V+=5V,ZeroPotCentered,GainPot=2.4kΩ,UnlessOtherwiseSpecified
PARAMETERTESTCONDITIONSMINTYPMAXUNITSOperatingSupplyVoltageRange,V+4.555.5VSupplyCurrent,I+100kΩtoV+onPins3,4,5--17mAInputImpedance,ZI-100-MΩ
InputBiasCurrent,IIBPins10and11--80-nA
UnadjustedZeroOffsetV11-V10=0V,ReadDecodedOutput-12-+12mV
UnadjustedGainV11-V10=900mV,ReadDecodedOutput846-954mVLinearityNotes1and2-1-+1CountConversionRateSlowModePin6=OpenorGND-4-Hz
FastModePin6=5V-96-HzConversionControlVoltage(HoldMode)atPin60.81.21.6V
CommonModeInputVoltageRange,VICRNotes3,4-0.2-+0.2V
BCDSinkCurrentatPins1,2,15,16VBCD
≥0.5V,atLogicZeroState0.41.6-mA
DigitSelectSinkCurrentatPins3,4,5VDIGITSelect=4VatLogicZeroState1.62.5-mA
ZeroTemperatureCoefficientVI=0V,ZeroPotCentered-10-µV/oVGainTemperatureCoefficientVI=900mV,GainPot=2.4kΩ-0.005-%/oCNOTES:1.Apply0VacrossV11toV10.Adjustzeropotentiometertogive000mVreading.Apply900mVtoinputandadjustgainpotentiometerto
give900mVreading.
2.Linearityismeasuredasadifferencefromastraightlinedrawnthroughzeroandpositivefullscale.Limitsdonotinclude±0.5countbitdigitizingerror.
3.Forapplicationswherelowinputpin10isnotoperatedatpin7potential,areturnpathofnotmorethan100kΩresistancemustbeprovidedforinputbiascurrents.
4.Thecommonmodeinputvoltageabovegroundcannotexceed+0.2Vifthefullinputsignalrangeof999mVisrequiredatpin11.Thatis,pin11maynotoperatehigherthan1.2Vpositivewithrespecttogroundor0.2Vnegativewithrespecttoground.Ifthemaximuminputsignalislessthan999mV,thecommonmodeinputvoltagemayberaisedaccordingly.
CA3162元器件交易网www.cecb2b.com