CJ125-Product-Info--传感器

1IntegratedcircuitforcontinuouslambdaregulationwithRimeasurementTheintegratedcircuitCJ125isacontrolandamplifiercircuitforawiderangeλ-SensorLSU4.xforthecontinuousregulationofλincombinationwiththesensorintherangeofλ=0.65...•(air).Customerbenefits:Excellentsystemknow-howSmartconceptsforsystemsafetySecuredsupplyLong-termavailabilityofmanufacturingprocessesandproductsQS9000andISO/TS16949certifiedFeaturesCurrentsandVoltages(box1)Pumpcurrentcontrol(boxes2ato2b)Pumpcurrentsenseamplifier(boxes3ato3b)Lambdaoutputamplifier(box4)Virtualgroundvoltagesourceforsensorandpumpcurrentcontrol(box5)Nernstcellreferencevoltagesource(box6)Oscillator(box7)CircuitforRiorRicalmeasurement(boxes8ato8d)Diagnosticofsensorlines(box9)Diagnosticofexternalheater(box10)Serial-Peripheral-Interface(SPI;box11)Programmablereferencepumpingcurrents(box12)SuppressionofRi-measurement(box13)AutomotiveElectronicsProductInformationLambdaProbeInterfaceIC-CJ1252Block-/functionaldiagramApplicationcircuit(onlyproposal!)3TheapplicationcircuitoftheCJ125consistsofthefollowingparts:Capacitorbetween[VCC]and[GND]tostabilizethesupplyvoltageVCCCapacitorbetween[UB]and[GND]tostabilizethesupplyvoltageVUBCapacitorbetween[CF]and[GND]tofilterthelambdasignalCapacitorbetween[UA]and[GND]tostabilizelambdasignaloutputCapacitorbetween[UN]and[GND]tostabilizenernstsignalCapacitorbetween[/RST]and[GND]tostabilizeresetsignalShuntbetween[IA]and[IP]forpumpcurrentsensingResistorbetween[IA]and[UP]tocompensateparasiticeffectsofthelambdasensorResistorbetween[US]and[UP]tofeedthenernstcellreferencevoltageintothepumpcurrentcontrolcircuitResistorbetween[UP]and[UN]forleakagedetectionResistorbetween[RF]and[CF]tofilterthelambdasignalCapacitorbetween[UR]and[GND]tostabilizetheoutputsignalforADCCapacitorbetween[UN]and[GND]forfilteringResistorbetween[RM]andcapacitorat[CM]foradjustmentofRimeasurementcurrentCapacitorbetween[CM]andresistanceat[RM]forDCfilteringResistorbetween[RS]and[VM]foradjustmentResistorbetween[DIAHD]andDrainoftheexternalheaterResistorandcapacitorbefore[UN]forfilteringPINconfigurationSOIC24PLCC28LQFP324PindescriptionPinDescriptionUBPowersupplyinput(14V)VCC,VCCSa)Powersupplyinput(5V)GND,GNDSb)GroundVMVirtualgroundofpumpcurrentcontrolandoftheLSU(0.5VCC)USNernstcellreferencevoltage(450mV)IPInvertinginputofpumpcurrentamplifier(shuntvoltage)IANoninvertinginputofpumpcurrentamplifierandoutputofthepumpcurrentcontrolRFOutputofpumpcurrentamplifier(-externalfilter)CFInputoflambdaoutputamplifier(afterexternalfilter)UAOutputoflambdaoutputamplifierUPNoninvertinginputofpumpcurrentcontrolUNInvertinginputofpumpcurrentcontrolrespectivein-/outputforRi-measurement(LSU)PinDescriptionRMOutputRi-measurementcurrent(DC)CMInputRi-measurementcurrent(AC,DCfree)RSIn-/outputRi-calibrationmeasurementUROutputRi-signal(analogous)DIAHGDiagnosisinput(gateofexternaltransistor)DIAHDDiagnosisinput(drainofexternaltransistor)SCKInputSPI-clock(fromµC)SIInputserialdata(SPI,fromµC)SOOutputserialdata(SPI,toµC)/SSSlaveselect(SPI,fromµC)/RSTInputResetOSZRextern=10kΩa.)ForhybridversionitisrecommendedtoconnectVVCSwiththereferenceVCCfortheADCb.)ForhybridversionitisrecommendedtoconnectGNDSwiththereferencegroundfortheADCMaximumRatingsParameterConditionSymbolMin.Max.UnitSupplyvoltageUBVUB-0.335VSupplyvoltageVCCVVCC-0.35.5VTemperaturejunctionstorageambientforSOIC/PLCCformax50hambientforLQFPformax50hTJTSTTA-40-40-40-40150150110125125140°C°C°C°C°C°CMaximumallowedvoltagesvalidforpins:RM,UP,US,RF,CF,UA,UR,DIAHG,DIAHD;SCK,SI,SO,/SS,/RST,OSZAllowedcurrentext.resistor6.8kΩVXIDIAHD-0.3-1VVCC+0.310VmAMaximumallowedvoltages,nodestructionwhenISO-pulses3a,bareapplied.Validforboardpins:RS,UN,VM,IA,IP,CMVX-0.328VOffsetbetweenGNDandGNDS∆VGND-0.250.25VOffsetbetweenVCCandVCCS∆VVCC-0.250.25VESDHumanBodyModelR=1.5kΩ,C=100pF-22kV5ElectricalCharacteristicsParameterConditionSymbolMin.Max.UnitPowerSupplyPowersupplyOperatingrangeVGND=VGNDSVVCC=VVCCSVUBVVCC94.75185.25VVCurrentconsumptionIVCC76mACurrentconsumptionIVCCS4mAPumpcurrentcontrolOffsetvoltageVoff-1010mVInputcurrent-40°C•Tj150°CIUP,UN-11µAInputoffsetcurrent-40°C•Tj150°CIoff-11µAOutputcurrentsourceconditionVUNVUP;PA=1;0.5VVIAVCC-0.5V-IA1030mAOutputcurrentsinkconditionVUNVUP;PA=1;0.6VVIAVCC-0.5VIA1030mANooutputcurrentPA=0IA-1010µAPumpcurrentsenseamplifier(LA=0:measurementmode;LA=1:adjustmentmode)Inputcurrent-40°C•Tj150°CIIP-11µAAmplificationSPI-bitVL=1A016.6217.24AmplificationSPI-bitVL=0A07,828.15CommonmoderejectionratioCMRR-1=∆VUA/∆VIPVIP=VIA=1...4V0.5VVUAVCC-0.5V|IUA|10µACMRR-112mV/VOutputvoltageswing|IUA|10µA;LA=0VUA0.20VVCC-0.18VOutputvoltageadjustmentIRF=0µA;LA=1VFR/VVCC0.2850.315Outputerroroffsetadjust∆VUA=VUA(LA=1)-VUA(LA=0)VIP=VIA=VVM|IUA|10µA•VUA-33mVVirtualgroundvoltagesourceOutputcurrentoperatingrangeIVM-IIA-2-IIA+2mAOutputvoltageratio-IIA-1mAIVM-IIA+1mAVVM/VVCC0.480.52NernstcellreferencevoltagesourceOutputcurrentoperatingrangeIUS-0.40.4mAOscillatorFrequencyexternal10kΩf2.493.51kHzMeasurementcurrentforRi(RA=0measurementmode;RA=1adjustmentm