北大光纤通信课件：ADN8830

PRELIMINARYTECHNICALDATAREV.PrCInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.aADN8830OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©AnalogDevices,Inc.,2002PreliminaryTechnicalDataThermoelectricCoolerControllerFUNCTIONALBLOCKDIAGRAMFEATURESHighEfficiencySmallSize:5mm
5mmLFCSPLowNoise:0.5%TECCurrentRippleLongTermTemperatureStability:±0.01CFrequencyandPhaseCompensationinControlLoopTemperatureLockIndicationThermistorLinearityCorrectionCompatibilityTemperatureMonitoringOutputOscillatorSynchronizationwithanExternalSignalClockPhaseAdjustmentforMultipleControllersProgrammableSwitchingFrequencyupto1MHzThermistorFailureAlarmMaximumTECVoltageProgrammabilityAPPLICATIONSThermoelectricCooler(TEC)TemperatureControlResistiveHeatingElementControlTemperature-StabilizationSubstrate(TSS)ControlGENERALDESCRIPTIONTheADN8830isamonolithiccontrollerthatdrivesaThermoelectricCooler(TEC)tostabilizethetemperatureofalaserdiodeorapassivecomponentusedintelecommunica-tionsequipment.ThisdevicereliesonaNegativeTemperatureCoefficient(NTC)thermistortosensethetemperatureoftheobjectattachedtotheTEC.ThetargettemperatureissetwithananaloginputvoltageeitherfromaDACorwithanexternalresistordivider.PIDCOMPENSATIONNETWORKTEMPERATUREMEASUREMENTAMPLIFIERPWMCONTROLLERFROMTHERMISTORTEMPSETINPUTVOLTAGEREFERENCEVREFOSCILLATORFREQUENCY/PHASECONTROLP-CHANNEL(UPPERMOSFET)N-CHANNELMOSFETDRIVERSP-CHANNEL(LOWERMOSFET)N-CHANNELTheloopisstabilizedbyaPIDcompensationamplifierwithhighstabilityandlownoise.Thecompensationnetworkcanbeadjustedbytheusertooptimizetemperaturesettlingtime.Thecomponentvaluesforthisnetworkcanbecalculatedbasedonthethermaltransferfunctionofthelaserdiodeorobtainedfromthelook-uptablegivenintheapplicationsnotes.VoltageoutputsareprovidedtomonitorboththetemperatureoftheobjectandthevoltageacrosstheTEC.A2.5Vvoltagereferenceisalsoprovided.PRELIMINARYTECHNICALDATAREV.PrC–2–ADN8830–SPECIFICATIONSParameterSymbolConditionsMinTypMaxUnitsTEMPERATURESTABILITYLongTermStabilityUsing10kΩthermistorwith,α=–4.4%at25°C0.01°CPWMOUTPUTDRIVERSOutputTransitionTimetR,tFCL=3,300pF20nsNon-OverlappingClockDelay65nsMaximumGateDriveCurrentIMAX(N1,P1)1.0AOutputResistanceRO(N1,P1)IL=50mA6ΩOutputVoltageSwingOUTAVLIM=0V0VDDVOutputVoltageRipple∆OUTAfCLK=1MHz0.2%OutputCurrentRipple∆ITECfCLK=1MHz0.2%LINEAROUTPUTAMPLIFIERCapacitiveLoadDriveCLOAD(N2,P2)10nFOutputResistanceR0,P2IOUT=2mA85ΩR0,N2IOUT=2mA178ΩOutputVoltageSwingOUTB0VDDVPOWERSUPPLYPowerSupplyVoltageVDD3.35.0VPowerSupplyRejectionRatioPSRRVDD=3.3Vto5V,VTEC=0V6092dB–40°C≤TA≤+85°C50SupplyCurrentISYPWMnotswitching812mA–40°C≤TA≤+85°C150mAShutdownCurrentISDPin10=0V5µASoft-StartChargingCurrentISS100µAUndervoltageLockoutVOLOCKLowtohighthreshold2.62.7VERRORAMPLIFIERInputOffsetVoltageVOSVCM=1.5V50250µVGainAV,IN20V/VInputVoltageRangeVCM0.22.0VCommon-ModeRejectionRatioCMRR0.2VVCM2.0V68dB–40°C≤TA≤+85°C60dBOpen-LoopInputImpedanceRIN1.0GΩGain-BandwidthProductGBW2MHzREFERENCEVOLTAGEReferenceVoltageVREFIREF2mA2.452.472.49VOSCILLATORSyncRangefCLKPin25connectedtoexternalclock2001,000kHzOscillatorFrequencyfCLKPin24=VDD;(R=300kΩ;Pin25=GND)480500520kHzPhaseAdjustmentφCLK45360DegreesLOGICCONTROL1LogicLowInputThreshold0.2VLogicHighInputThreshold3.0VLogicLowOutputLevel0.2VLogicHighOutputThresholdVDD–0.2VNOTE1LogicinputsmeettypicalCMOSI/Oconditionsforsource/sinkcurrent(~1µA).(@VDD=3.3Vto5.0V,VGND=0V,TA=25C,TSET=25C,usingtypicalapplicationconfigurationasshowninFigure1,unlessotherwisenoted.)PRELIMINARYTECHNICALDATAREV.PrCADN8830–3–ABSOLUTEMAXIMUMRATINGS1SupplyVoltage.................................+6VInputVoltage.......................GNDtoVS+0.3VOutputShortCircuittoGNDDuration.............TBDStorageTemperatureRange............–65°Cto+150°COperatingTemperatureRange...........–40°Cto+85°CJunctionTemperatureRangeCPPackages......................–65°Cto+150°CLeadTemperatureRange(Soldering,10sec).......+300°CESDRATINGS883(HumanBody)Model......................2.0kVNOTES1StressesabovethoselistedunderAbsoluteMaximumRatingsmaycauseperma-nentdamagetothedevice.Thisisastressratingonly;functionaloperationofthedeviceattheseoranyotherconditionsabovethoselistedintheoperationalsectionsofthisspecificationisnotimplied.Exposuretoabsolutemaximumratingcondi-tionsforextendedperiodsmayaffectdevicereliability.PackageTypeJA1JCUnits32-LeadLFCSP(ACP)3510°C/WNOTE1θJAisspecifiedforworstcaseconditions,i.e.,θJAisspecifiedfordevicesolderedin4-layercircuitboardforsurfacemountpackages.CAUTIONESD(electrostaticdischarge)sensitivedevice.Electrostaticchargesashighas4000Vreadilyaccumulateonthehumanbodyandtestequipmentandcandischargewithoutdetection.AlthoughtheADN8830featuresproprietaryESDprotectioncircuitry,permanentdamagemayoccurondevicessubjectedtohigh-energyelectrostaticdischarges.T