标签: photodiode

光电二极管可分为二类：一类为大面积光电二极管，具有高电容(30pF至3000pF)；另一类是小面积光电二极管，具有相对小的电容(小于10pF)。为提高信噪比，具有反相运算放大器和反馈电阻的跨阻放大器常用于将光电二极管的电流转换为电压。在低噪声放大器设计中，大面积光电二极管放大器需要关注减小运算放大器的输入电压噪声，而小面积光电二极管放大器则更多地关注于减少运算放大器的输入电流噪声和寄生电容。advertisementLowNoiseAmpliersforSmallandLargeAreaPhotodiodesDesignNote399GlenBriseboisIntroductionPhotodiodescanbebrokenintotwocategories:largeerconsistsofCDM(theamplier’sdifferentialmodeareaphotodiodeswiththeirattendanthighcapacitancecapacitance)andoneCCM(thecommonmodecapacitance(30pFto3000pF)andsmallerareaphotodiodeswithattheamplier’s-inputonly),orabout6pFtotal.Therelativelylowcapacitance(10pForless).Foroptimalsmallphotodiodehas1.8pF,sotheinputcapacitanceofsignal-to-noiseperformance,atransimpedanceampliertheamplieris……

Abstract:ThisarticlediscussesapplicationcircuitsforMaximforce/sensedigital-to-analogconverters(DACs).Applicationsinclude:selectablefixed-gainDAC,programmablegainDAC,photodiodebiascontrol,amperometricsensorcontrol,digitallyprogrammablecurrentsource,Kelvinloadsensing,temperaturesensing,andhighcurrentDACoutput.AbriefdescriptionofthevariousDACoutputconfigurationsisalsogiven.Maxim>DesignSupport>AppNotes>A/DandD/AConversion/SamplingCircuits>APP807Maxim>DesignSupport>AppNotes>DigitalPotentiometers>APP807Maxim>DesignSupport>AppNotes>InterfaceCircuits>APP807Keywords:DACapplicationcircuits,Force/senseDAC,DAC,digitaltoanalogconvertor,selectableDACgain,programmableDACgain,digitalpotentiometers,photodiodecontrol,amperometricsensorbiascontrol,digitallyprogrammablecurrentsource,tempsenseOct02,2001APPLICATIONNOTE807Force/SenseDACApplicationsAbstract:ThisarticlediscussesapplicationcircuitsforMaximforce/sensedigital-to-analogconverters(DACs).Applicationsi……

Abstract:Thecircuitinthefigurebelowincludesa10-bitdigital-to-analogconverter(DAC)with3-wireserialinputthatoperatesandmaintainsavisible-lightlaserdiodeatconstantaverageopticaloutputpower.Aseparatedigitalinputline(MOD)enablesacomparatorwithopen-drainoutput(IC4)toimplementdigitalcommunicationsbypulsingthelaser-diodethroughQ1.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSFIBER-OPTICCIRCUITSKeywords:modulatedlaser,diodedriver,visible-lightlaser,optical,photodiode,photodiode,peakopticalJul01,2001power,visiblelaserdriverAPPLICATIONNOTE1811Visible-LaserDriverHasDigitallyControlledPowerModulationAbstract:Thecircuitinthefigurebelowincludesa10-bitdigital-to-analogconverter(DAC)with3-wireserialinputthatoperatesandmaintainsavisible-lightlaserdiodeatconstantaverageopticaloutputpower.Aseparatedigitalinputline(MOD)enablesacomparatorwithopen-drainoutput(IC4)toimplementdigitalcommunicationsbypulsingthelaser-diodethroughQ1.Manylaserdiodesincludeaphotodiodethatgeneratesacurrent……

Abstract:Transimpedanceamplifiers(TIAs)arewidelyusedtotranslatethecurrentoutputofsensorslikephotodiode-to-voltagesignals,sincemanycircuitsandinstrumentscanonlyacceptvoltageinput.AnoperationalamplifierwithafeedbackresistorfromoutputtotheinvertinginputisthemoststraightforwardimplementationofsuchaTIA.However,eventhissimpleTIAcircuitrequirescarefultrade-offsamongnoisegain,offsetvoltage,bandwidth,andstability.ClearlystabilityinaTIAisessentialforgood,reliableperformance.Thisapplicationnoteexplainstheempiricalcalculationsforassessingstabilityandthenshowshowtofine-tunetheselectionofthefeedbackphase-compensationcapacitor.Maxim>DesignSupport>TechnicalDocuments>Tutorials>AmplifierandComparatorCircuits>APP5129Maxim>DesignSupport>TechnicalDocuments>Tutorials>Sensors>APP5129Keywords:TIA,transimpedanceamplifier,transimpedanceamp,photodiode,medicalinstrumentation,industrialcontrol,piezo-sensorinterface,TIAstability,feedbackcapacitance,phasecompensation,bodeplotFeb03,2012TUTORIAL5129StabilizeYourTransimpedanceAmplifierBy:AkshayBhat,SeniorStrategicApplicationsEngineerFeb03,2012Abstract:Transimpedanceamplifiers(TIAs)arewidelyusedtotranslatethecurrentoutputofsensorslikephotodiode-to-voltagesignals,sincema……

比较器用来检测单个光子的伽马辐射。示意图、设计注意事项和组件选择进行讨论。Maxim/Dallas>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUTOMOTIVEMEASUREMENTCIRCUITSKeywords:gammaray,photon,radiationdetector,lownoiseopamp,PIN,photodiode,gammaradiation,Jul21,2003operationamplifiers,opamps,comparatorAPPLICATIONNOTE2236Gamma-PhotonRadiationDetectorAPINphotodiode,fourlow-noiseopampsandacomparatorareusedtodetectindividualphotonsofgammaradiation.Theschematic,designconsiderationsandcomponentselectionarediscussed.ThecircuitofFigure1includesaPINphotodiodethatdetectsindividualphotonsofgammaradiation.Whenaphotonstrikesadepletionregioncreatedbyreversebiasonthephotodiode,itproducesasmallamountofchargeinproportiontothephoton'senergy.Theresultingsignalisthen……

摘要：互阻放大器（TIA）被广泛用于转换电流输出的传感器，如光电二极管的电压信号，因为许多电路和仪器只能接受电压输入。与一个反馈电阻从输出到反相输入的运算放大器是最简单的实现这样一个TIA。然而，即使这样简单的TIA电路之间的噪声增益，失调电压，带宽和稳定性需要仔细权衡。显然，在TIA的稳定是必不可少的好，性能可靠。本应用笔记介绍了评估稳定的经验计算，然后显示如何微调反馈相位补偿电容的选择。Maxim>DesignSupport>TechnicalDocuments>Tutorials>AmplifierandComparatorCircuits>APP5129Maxim>DesignSupport>TechnicalDocuments>Tutorials>Sensors>APP5129Keywords:TIA,transimpedanceamplifier,transimpedanceamp,photodiode,medicalinstrumentation,industrialcontrol,piezo-sensorinterface,TIAstability,feedbackcapacitance,phasecompensation,bodeplotFeb03,2012TUTORIAL5129StabilizeYourTransimpedanceAmplifierBy:AkshayBhat,SeniorStrategicApplicationsEngineerFeb03,2012Abstract:Transimpedanceamplifiers(TIAs)arewidelyusedtotranslatethecurrentoutputofsensorslikephotodiode-to-voltagesignals,sincema……

摘要：低输入电容运算放大器的应用，如烟雾探测器，光电二极管放大器，医疗仪器，工业控制系统，压电式传感器接口。最大限度地降低输入电容也可以增加一杆在反馈路径的频率，直到它有一个电路的影响可以忽略。测量运算放大器的输入电容是不平凡的，尤其是如果该值是只有几个皮法。如此低的价值也提出在生产过程中测试的筛选运算放大器的困难。这一设计思想，介绍了如何准确地确定任何运算放大器的输入电容。Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP5086Keywords:opamp,operationalamp,inputcapacitance,transimpedanceamp,photodiodetransimpedanceamp,medicalinstrumentation,industrialcontrol,piezo-sensorinterface,bodeplot,RCfilter,opampinputimpedance,opampstability,photodiodecapacitanceJul01,2011APPLICATIONNOTE5086MeasuretheInputCapacitanceofanOpAmpBy:AkshayBhat,SeniorStrategicApplicationsEngineerAbstract:Opampswithlowinputcapacitancearerequiredinapplicationssuchassmokedetectors,photodiodetransimpedanceamplifiers,medicalinstrumentation,industrialcontrolsystems,andth……

摘要：下图中的电路包括10位数字-模拟转换器（DAC），运营和维护一个可见的光激光二极管恒定的平均光输出功率的3线串行输入。一个独立的数字输入线（MOD），使漏极开路输出（IC4的）来实现数字通信，脉冲激光二极管，通过Q1比较。Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSFIBER-OPTICCIRCUITSKeywords:modulatedlaser,diodedriver,visible-lightlaser,optical,photodiode,photodiode,peakopticalJul01,2001power,visiblelaserdriverAPPLICATIONNOTE1811Visible-LaserDriverHasDigitallyControlledPowerModulationAbstract:Thecircuitinthefigurebelowincludesa10-bitdigital-to-analogconverter(DAC)with3-wireserialinputthatoperatesandmaintainsavisible-lightlaserdiodeatconstantaverageopticaloutputpower.Aseparatedigitalinputline(MOD)enablesacomparatorwithopen-drainoutput(IC4)toimplementdigitalcommunicationsbypulsingthelaser-diodethroughQ1.Manylaserdiodesincludeaphotodiodethatgeneratesacurrent……

MAX971）和光电二极管的组合被用于电视机遥控器红外（IrDA）信号检测等RC滤波器，减少环境光噪声和交流电的嗡嗡声。电路的输出可以驱动一个CMOS设置复位触发器或中断一个沉睡的微处理器。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSMISCELLANEOUSCIRCUITSKeywords:infraredsensor,infraredmonitor,lowsupplycurrentcomparator,comparatorplusreference,Oct13,1997photodiode,IrDAsignals,TVremotecontrolAPPLICATIONNOTE1101IRSensor/MonitorWakesHostSystemAbstract:Thecombinationofanultralowsupplycurrent,comparatorplusreference(MAX971)andphotodiodeareusedtodetectinfrared(IrDA)signalsforTVremotecontrol,etc.RCfiltersreduceambientlightnoiseandACmainshum.Thecircuit'soutputcandriveaCMOSset-resetflip-floporinterruptasleepingmicroprocessor.Thesensor/monitorcircuitofFigure1"wakesup"thehostsystemondetectionofinfrared(IR)signals.Itdrawssolittlesupplycurrentthatitcanrema……

：PIN光电二极管，四个低噪声运算放大器和比较器，用于探测单个光子的伽玛射线。的原理，设计考虑和选择组件进行了讨论。Maxim/Dallas>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUTOMOTIVEMEASUREMENTCIRCUITSKeywords:gammaray,photon,radiationdetector,lownoiseopamp,PIN,photodiode,gammaradiation,Jul21,2003operationamplifiers,opamps,comparatorAPPLICATIONNOTE2236Gamma-PhotonRadiationDetectorAPINphotodiode,fourlow-noiseopampsandacomparatorareusedtodetectindividualphotonsofgammaradiation.Theschematic,designconsiderationsandcomponentselectionarediscussed.ThecircuitofFigure1includesaPINphotodiodethatdetectsindividualphotonsofgammaradiation.Whenaphotonstrikesadepletionregioncreatedbyreversebiasonthephotodiode,itproducesasmallamountofchargeinproportiontothephoton'senergy.Theresultingsignalisthen……

摘要：DS3930包含6个256位的非易失性电位器，使DS3930需要多个电压基准的应用的理想设备。DS3930还具有四个通用，非易失性I/O引脚可以监视数字输入或提供一个数字输出。本应用笔记提供的例子使用的DS3930作为一个参考电压和数字I/OMaxim>AppNotes>DIGITALPOTENTIOMETERSKeywords:DS3930,potentiometer,non-volatile,nonvolatile,voltagereference,digitalI/O,LCD,fan,Jun25,2003photodiode,comparator,pressuresensorAPPLICATIONNOTE2140ExamplesUsingtheDS3930asVoltageReferencesandDigitalI/OAbstract:TheDS3930containssix256-positionnonvolatilepotentiometers,whichmakestheDS3930anidealdeviceforapplicationsneedingmultiplevoltagereferences.TheDS3930alsohasfourgeneral-purpose,nonvolatileI/Opinsthatcanmonitoradigitalinputorsupplyadigitaloutput.ThisapplicationnoteprovidesexamplesusingtheDS3930asavoltagereferenceanddigitalI/O.IntroductionTheDS3930containssix256-positionnonvolatile(NV)potentiometers(seeFigure1),whichmakestheDS393……

摘要：本文讨论了应用电路的格言力/感的数模转换器（Dac）。应用程序包括：DAC可选择固定增益DAC、可编程增益DAC、光电二极管偏置控制、安培传感器控制、数字可编程电流源、开尔文负载传感、温度传感，和高电流输出。此外提供了各种DAC输出配置的简短说明。Maxim>DesignSupport>AppNotes>A/DandD/AConversion/SamplingCircuits>APP807Maxim>DesignSupport>AppNotes>DigitalPotentiometers>APP807Maxim>DesignSupport>AppNotes>InterfaceCircuits>APP807Keywords:DACapplicationcircuits,Force/senseDAC,DAC,digitaltoanalogconvertor,selectableDACgain,programmableDACgain,digitalpotentiometers,photodiodecontrol,amperometricsensorbiascontrol,digitallyprogrammablecurrentsource,tempsenseOct02,2001APPLICATIONNOTE807Force/SenseDACApplicationsAbstract:ThisarticlediscussesapplicationcircuitsforMaximforce/sensedigital-to-analogconverters(DACs).Applicationsi……