标签: dacs

Abstract:Connectingtheoutputsofa1-Wireaddressableswitch(DS2408)toaresistornetworkallowsthe1-WireinterfacetocontrolasimpleDAC.ThisideaisillustratedbythepresentationofanLED-brightnesscontroller.Maxim>AppNotes>1-WireDevicesKeywords:1-Wireswitches,1-Wireinterface,currentmirrors,D/Aconverters,DACs,resistornetworksOct19,2009APPLICATIONNOTE4627ASimple1-WireDACBy:BernhardLinkeAbstract:Connectingtheoutputsofa1-Wireaddressableswitch(DS2408)toaresistornetworkallowsthe1-WireinterfacetocontrolasimpleDAC.ThisideaisillustratedbythepresentationofanLED-brightnesscontroller.AsimilarversionofthisarticlewaspublishedonSeptember29,2009onthePlanetAnalogwebsite.Amongdevicesavailablewitha1-Wireinterface,thebestknownarememories,temperaturesensors,batterymonitors,andaddressableswitches.One-WireADCsarealsoavailable,butno1-WireDACs.Youcan,however,buildasimple1-WireDACusingaddressa……

摘要：以下讨论验证了一个被现存A/D转换器应用所忽略的选择：有些条件下采用分立的比较器和D/A转换器更容易实现A/D转换。这种替代方案通常采用不同的测试方法，但是具有低成本、高速度、更大灵活性以及更低功耗等优点。利用比较器/DAC组合解决数据采集问题Mar01,2012摘要：以下讨论验证了一个被现存A/D转换器应用所忽略的选择：有些条件下采用分立的比较器和D/A转换器更容易实现A/D转换。这种替代方案通常采用不同的测试方法，但是具有低成本、高速度、更大灵活性以及更低功耗等优点。尽管当前趋势全部集中一个方向―设计者需要使用A/D转换器时通常选定一个集成的A/D转换器(ADC)。大多数工程师并没有意识到还有降低ADC性价比的其它替代方案。而模拟比较器、D/A转换器(DAC)和信号处理一起恰好就是构成逐次逼近ADC的核心电路。某些特定领域，分立比较器/DAC的使用非常普遍。自动测试设备、核脉冲反应堆高度监测器以及自动化时域反射计等，通常都采用这种技术，DAC用于驱动比较器的一个输入，另一个输入由被监测信号驱动。接下来是通用测试问题以及特定方法的选择，事实上，此时采用比较器/DAC组合比采用现成的ADC更受欢迎。瞬态电压分析捕获快速幅度变化事件(瞬态)的“强力”技术就是采用处理器支持的高速ADC和RAM对其进行简单量化(图1)。单触发事件可能必须采用这种方法，因为需要获取瞬态细节。然而，如果瞬态是重复性的，则可采用DAC/比较器的方法测量它们的峰值幅度及其它特性(图2)。图1.采用“强力”法进行瞬态分析，ADC电路耗电大且价格昂贵图2.如果图1应用可接受对幅度进行重复测量，用DAC/比较器组合替代ADC可省电并降低成本比较器的一个输入引脚由DAC设置判定电平，瞬态信号施加到另一个输入。通过调整DAC输出可确定峰值瞬态幅度，超越门限时，采用数字锁存捕获比较器的输出响应。仅需要比较器输入支持瞬态带宽，任意长的DAC输出建立时间并不会影响测量精度。这样，在模拟域可用低成本DAC和……

摘要：以下讨论验证了一个被现存A/D转换器应用所忽略的选择：有些条件下采用分立的比较器和D/A转换器更容易实现A/D转换。这种替代方案通常采用不同的测试方法，但是具有低成本、高速度、更大灵活性以及更低功耗等优点。利用比较器/DAC组合解决数据采集问题Mar01,2012摘要：以下讨论验证了一个被现存A/D转换器应用所忽略的选择：有些条件下采用分立的比较器和D/A转换器更容易实现A/D转换。这种替代方案通常采用不同的测试方法，但是具有低成本、高速度、更大灵活性以及更低功耗等优点。尽管当前趋势全部集中一个方向―设计者需要使用A/D转换器时通常选定一个集成的A/D转换器(ADC)。大多数工程师并没有意识到还有降低ADC性价比的其它替代方案。而模拟比较器、D/A转换器(DAC)和信号处理一起恰好就是构成逐次逼近ADC的核心电路。某些特定领域，分立比较器/DAC的使用非常普遍。自动测试设备、核脉冲反应堆高度监测器以及自动化时域反射计等，通常都采用这种技术，DAC用于驱动比较器的一个输入，另一个输入由被监测信号驱动。接下来是通用测试问题以及特定方法的选择，事实上，此时采用比较器/DAC组合比采用现成的ADC更受欢迎。瞬态电压分析捕获快速幅度变化事件(瞬态)的“强力”技术就是采用处理器支持的高速ADC和RAM对其进行简单量化(图1)。单触发事件可能必须采用这种方法，因为需要获取瞬态细节。然而，如果瞬态是重复性的，则可采用DAC/比较器的方法测量它们的峰值幅度及其它特性(图2)。图1.采用“强力”法进行瞬态分析，ADC电路耗电大且价格昂贵图2.如果图1应用可接受对幅度进行重复测量，用DAC/比较器组合替代ADC可省电并降低成本比较器的一个输入引脚由DAC设置判定电平，瞬态信号施加到另一个输入。通过调整DAC输出可确定峰值瞬态幅度，超越门限时，采用数字锁存捕获比较器的输出响应。仅需要比较器输入支持瞬态带宽，任意长的DAC输出建立时间并不会影响测量精度。这样，在模拟域可用低成本DAC和……

Abstract:Despitethepopularityofdigitaldevices,real-worldsignalsaretypicallyrepresentedbyanalogsignals.Digitalcontrolsystemsprocessanalogsignalsbyusingananalog-to-digitalconverter(ADC)toconvertanalogsignalstodigital.Conversionsbacktoanalogsignalsareaccomplishedusingadigital-to-analogconverter(DAC).MaximoffersacompletelineofprecisionDACsfrom8to16bits.ItisimportanttofindaDACthatmeetstherequirementsoftheapplication.Adesignengineerneedstolookatparameterssuchaslinearity,resolution,speed,andaccuracywhenselectingaDAC.Maxim>Designsupport>Appnotes>A/DandD/AConversion/SamplingCircuits>APP1055Keywords:DACs,digitalanalog,digitaltoanalogconverter,INL,DNL,linearity,gainerror,offseterror,control,PLC,actuatorsApr16,2002APPLICATIONNOTE1055Digital-to-AnalogConvertersArea"Bit"AnalogAbstract:Despitethepopularityofdigitaldevices,real-worldsignalsaretypicallyrepresentedbyanalogsignals.Digitalcontrolsystemsprocessanalogsignalsbyusingananalog-to-digitalconverter(ADC)toconvertanalogsignalstodigital.Conversionsbacktoanalogsignalsareaccomplishedusingadigital-to-analogconverter(DAC).Maximoffersacompleteli……

InanR-2RDACdesignwithsupplyvoltagesexceeding±5V,largevoltageglitches(upto1.5V)canoccurduringtheDAC'smajor-carrytransitions.Theseglitchescanpropagatethroughtheoutputbufferamplifierandappearatoutput.Theslewingofthelevelshiftersthatcontrolthetop(VREF+)andbottom(VREF-)single-poledouble-throwswitches(S0toSN)causestheglitchesMaxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSKeywords:DeglitchingTechniquesforHigh-VoltageR-2RDACsMay01,2001APPLICATIONNOTE583DeglitchingTechniquesforHigh-VoltageR-2RDACsInanR-2RDACdesignwithsupplyvoltagesexceeding±5V,largevoltageglitches(upto1.5V)canoccurduringtheDAC'smajor-carrytransitions.Theseglitchescanpropagatethroughtheoutputbufferamplifierandappearatoutput.Theslewingofthelevelshiftersthatcontrolthetop(VREF+)andbottom(VREF-)single-poledouble-throwswitches(S0toSN)causestheglitches(Figure1).Ifeachswitchofthe"inverted"R-2Rladderwereturnedonand/oroffinstantaneously,glitchamplitudesattheDACoutput(orinputoftheoutputbufferampli……

Abstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSSIGNALGENERATIONCIRCUITSKeywords:DACs,singlesupplyDAC,variablenegativecontrolvoltage,programmablenegativevoltage,May24,2002positivetonegativevoltagetranslator,digitalanalogconverter,digitaltoanalogconvertersAPPLICATIONNOTE1074DACandOpAmpGenerateVariableNegativeControlVoltageAbstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Earlydigital-to-analogconverters(DACs)weredesignedwithstandardR-2Rladders,a……

Abstract:Thisdocumentcollectsanddefinestechnicaltermscommonlyusedwithanalog-to-digitalconverters(ADCs)anddigital-to-analogconverters(DACs).Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSKeywords:glossary,ADCs,DACs,analogdigitalconverters,digitaltoanalogconverters,timedelay,jitter,Dec13,2000binary,DNL,INL,SNR,dynamicrange,sinad,sfdr,enob,gain,offset,distortion,lsb,monotonic,nyquist,quantization,THDAPPLICATIONNOTE641ADCandDACGlossaryAbstract:Thisdocumentcollectsanddefinestechnicaltermscommonlyusedwithanalog-to-digitalconverters(ADCs)anddigital-to-analogconverters(DACs).AcquisitionTimeAcquisitiontimeistheintervalbetweenthereleaseoftheholdstate(imposedbytheinputcircuitryofatrack-and-hold)andtheinstantatwhichthevoltageonthesamplingcapacitorsettlestowithin1LSBofanewinputvalue.Theequationforacquisitiontime……

Abstract:Thefollowingarticleprovidesaninsightofhowthe260Msps,14-bitdigital-to-analogconverter(DAC)MAX5195withLVPECLdigitalinputsfitsintoGSM/EDGE-basedtransceiverdesigns.ThearticledetailstheexactSFDR,IMD,SNRandMTPRrequirementsandhowtheMAX5195high-dynamicperformanceDACmeetsthesedemands.ThearticleconcludeswithapracticalexampleoftheDAC's4-toneMTPRperformanceusuallyfoundinGSM/EDGEapplications.Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsBasestations/WirelessInfrastructureHigh-SpeedSignalProcessingKeywords:high-speedDACs,digital-to-analogconverters,DAC,GSM,EDGE,transmitter,multi-carrier,dynamicperformance,spurious-Feb14,2003freedynamicrange,SFDR,signal-to-noiseratio,SNR,intermodulationdistortion,IMD,multi-tonepowerratio,MTPR,Tx,mask,modAPPLICATIONNOTE1886CriticalDACParametersforMulti-CarrierGSM/EDGETransmittersAbstract:Thefollowingarticleprovidesaninsightofhowthe260Msps,14-bitdigital-to-analogconverter(DAC)MAX5195withLVPECLdigitalinputsfitsintoGSM/EDGE-basedtransceiverdesigns.ThearticledetailstheexactSFDR,IMD,SNRandMTPRrequirementsandhowtheMAX5195high-dynamicperformance……

摘要：这样的设计理念，描述了一个简单的电路产生负可编程控制电压。它采用单电源数字-模拟转换器（DAC）的输出，并产生一个可变的负电压。DAC的输出从0V至+2.5V转换为0V至5V输出。Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSSIGNALGENERATIONCIRCUITSKeywords:DACs,singlesupplyDAC,variablenegativecontrolvoltage,programmablenegativevoltage,May24,2002positivetonegativevoltagetranslator,digitalanalogconverter,digitaltoanalogconvertersAPPLICATIONNOTE1074DACandOpAmpGenerateVariableNegativeControlVoltageAbstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Earlydigital-to-analogconverters(DACs)weredesignedwithstandardR-2Rladders,a……

摘要：下面的文章提供了一个如何260Msps，14位数字-模拟转换器（DAC）MAX5195与LVPECL数字输入到GSM/EDGE基于收发器的设计适合的洞察力。文章详细介绍了确切的SFDR，IMD，信噪比和MTPR要求，以及如何MAX5195高动态性能DAC满足了这些要求。本文的结论与实际的例子DAC的4音的MTPR通常在GSM/EDGE应用中的性能。Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsBasestations/WirelessInfrastructureHigh-SpeedSignalProcessingKeywords:high-speedDACs,digital-to-analogconverters,DAC,GSM,EDGE,transmitter,multi-carrier,dynamicperformance,spurious-Feb14,2003freedynamicrange,SFDR,signal-to-noiseratio,SNR,intermodulationdistortion,IMD,multi-tonepowerratio,MTPR,Tx,mask,modAPPLICATIONNOTE1886CriticalDACParametersforMulti-CarrierGSM/EDGETransmittersAbstract:Thefollowingarticleprovidesaninsightofhowthe260Msps,14-bitdigital-to-analogconverter(DAC)MAX5195withLVPECLdigitalinputsfitsintoGSM/EDGE-basedtransceiverdesigns.ThearticledetailstheexactSFDR,IMD,SNRandMTPRrequirementsandhowtheMAX5195high-dynamicperformance……

摘要：该电路保护汽车意外地接触到汽车的电池电压（16V最大）视频放大器，电压检测故障，并迅速打开功放和电池之间的连接。Maxim>AppNotes>CircuitProtectionVideoCircuitsKeywords:automotivecircuitprotection,videoDACs,digitalinverters,MOSFETsNov16,2010APPLICATIONNOTE4516SimpleCircuitProtectsAutomotiveVideoDriversfromOvervoltageAbstract:Thiscircuitprotectsautomotivevideoamplifiersfromaccidentalexposuretothecar'sbatteryvoltage(16Vmaximum),bysensingvoltagefaultsandquicklyopeningtheconnectionbetweenamplifierandbattery.AsimilarversionofthisarticleappearedintheMay20,2008issueofElectronicDesignmagazine.Inatypicalautomotivevideoapplication,thevideoDAC(fromarearcameraorDVDplayer,forexample)isfollowedbyalowpassreconstructionfilterandanamplifierth……

摘要：DS1851是一个双8位数字-模拟转换器（DAC），其中还包含双独立40字节的查找表（LUT）和内部数字温度传感器。其原始应用程序的激光器（VCSEL）驱动程序中使用的偏置电路的温度补偿。此应用程序的简要介绍了如何使用该A/D转换器提供温度补偿的同一类型的变容二极管，RF电路中常用的可变电容器。ApplicationNote1964DS1851:VaractorTemperatureCompensationwww.maxim-ic.comVaractorCharacteristicsVaractorsarediodesthatexhibitlargechangesincapacitancewhenthereversebiasisvaried.Thecapacitanceofavaractordecreasesasthereversebiasisincreased.Acapacitancechangeratioofgreaterthan5isnotuncommon.SeeFigure1foratypicalvaractorvoltage-capacitancecharacteristic.Figure1.TypicalVaractorVoltage-CapacitanceCharacteristic18.016.0……

摘要：该电路适应的雪崩光电二极管偏置电源IC（APDS）驱动高压的LED串，从而提供可调电流，软件关机，和逻辑开路故障指示。Maxim>AppNotes>DISPLAYDRIVERSKeywords:DACs,D/Aconverters,LEDdrivers,software-controlledlightintensityMar14,2005APPLICATIONNOTE3445High-VoltageLEDDriverProvidesSoftware-ControlledIntensityAbstract:Thiscircuitadaptsabias-supplyICforavalanchephotodiodes(APDs)todriveahigh-voltagestringofLEDs,therebyprovidingadjustablecurrent,softwareshutdown,andlogicindicationofopen-circuitfaults.RecentadvancesinoperatingefficiencyhaveexpandedtheuseofLEDsfrommereindicatorstobeingadrivingforceinelectroniclighting.Increasedreliabilityandruggedness(comparedtootherlightingtechnologies)givestheLEDabrightfuture,indeed.ManyICshavebeenintroducedinrecentyearsfordrivingLEDs,buttheissueofd……

Thisapplicationnotecomparesdigitaltoanalogconverters(DACs)todigitalpotentiometers.Traditionallydigitalpotentiometersweremeanttoreplacesimplemechanicalpots.Withrecentincreasesinresolutionandadditionalfeatures,digitalpotentiometerscanalsobeusedinsometraditionalDACsockets.Similarly,traditionalDACpackagesweretoobigandtoocostlytocompeteagainstdigitalpotentiometers.However,DACpricingandpackagesizehavereducedsignificantly,soinsomesocketsaDACordigitalpotentiometercanbeused.……