标签: epot

Acommonbrightness-controlcircuitforLEDsusesanelectricallycontrolledpotentiometer(EPOT)toachievedigitalcontroloftheLEDbrightness.ReplacingtheEPOTwithanRCnetwork,however,reducesboththeICcountandtherequirednumberofcontrollines.……

非易失性数字电位器……

Variablegainamplifiersoftenuseamechanicalpotentiometertosetthegain.Anexampleisavolumecontroldial.However,whentheanalogsignalpathisdigitallycontrolled,adigitalpotentiometermightbeusedtocontrolgain.Thisarticlediscussestheuseofthedigitalpotentiometertoformdigitallycontrolledgainorfilterblocks.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSDIGITALPOTENTIOMETERSKeywords:EPOTApplications:GainAdjustmentinOp-AmpCircuitsNov28,2001APPLICATIONNOTE864EPOTApplications:GainAdjustmentinOp-AmpCircuitsVariablegainamplifiersoftenuseamechanicalpotentiometertosetthegain.Anexampleisavolumecontroldial.However,whentheanalogsignalpathisdigitallycontrolled,adigitalpotentiometermightbeusedtocontrolgain.Thisarticlediscussestheuseofthedigitalpotentiometertoformdigitallycontrolledgainorfilterblocks.GeneralThroughoutthisdiscussionofdigitalpotentiometers,thetermEPOTisusedratherthandigitalpot,EEPOTorEPOT.ThetermEPOTdescribestheMaximseriesofvola……

摘要：双温度控制的DS1847/DS1848非易失（NV）可变电阻器由两个256位的线性可变电阻器和直接数字式温度传感器。该装置能够设置和温度补偿偏置电压和电流的使用最小的电路，这是利于控制应用。本应用笔记介绍，并提供了一个基于Excel的计算器，转换DS1847/DS1848温度为十六进制。转换工具转换回从十六进制的温度。ApplicationNote2099DS1847/DS1848OnlineInteractiveTemperatureCalculatorwww.maxim-ic.comOverviewTheDS1847/DS1848dualtemperature-controllednonvolatile(NV)variableresistorsconsistoftwo256-positionlinearvariableresistorsandadirect-to-digitaltemperaturesensor.Thedeviceiscapableofsettingandtemperature-compensatingbiasvoltagesandcurrentsusingminimalcircuitry,whichisbeneficialincontrolapplications.IntroductionTheaccompanyingcalculatorconvertstheDS1847/DS1848temperaturetohexadecimal.Theconversionutilityalsoconvertsbackfromhe……

可变增益放大器通常使用机械电位器来设置增益。一个例子是一个音量控制旋钮。然而，当模拟信号路径数字控制，数字电位器可能被用来控制增益。本文讨论了数字电位器的使用，形成数字控制增益或过滤块。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSDIGITALPOTENTIOMETERSKeywords:EPOTApplications:GainAdjustmentinOp-AmpCircuitsNov28,2001APPLICATIONNOTE864EPOTApplications:GainAdjustmentinOp-AmpCircuitsVariablegainamplifiersoftenuseamechanicalpotentiometertosetthegain.Anexampleisavolumecontroldial.However,whentheanalogsignalpathisdigitallycontrolled,adigitalpotentiometermightbeusedtocontrolgain.Thisarticlediscussestheuseofthedigitalpotentiometertoformdigitallycontrolledgainorfilterblocks.GeneralThroughoutthisdiscussionofdigitalpotentiometers,thetermEPOTisusedratherthandigitalpot,EEPOTorEPOT.ThetermEPOTdescribestheMaximseriesofvola……

摘要：DS1802是一个双音频设备范围内的对数电阻特性的锥形电位。每个电位器提供静音至少衰减90分贝的每一步和设备1分贝增量的65抽头。本数据表中给出的规格仅指分贝测量。如果设计者希望这些值计算比率，转换是必要的。本应用笔记回顾了从分贝比例转换。作为一个例子，工程师希望建立Excel表格描绘为DS1802和其他音频电位的增益计算公式在Excel中。虽然DS1802为例，本应用笔记适用于任何音频锥度电位。Maxim>AppNotes>AUDIOCIRCUITSDIGITALPOTENTIOMETERSKeywords:dBgain,dBM,gaincalculations,digitalpot,digipot,epot,audiopotentiometers,DS1802Mar03,2003APPLICATIONNOTE234CalculateRatiometricOutputsoftheLogPotDS1802Abstract:TheDS1802isadualaudiotaper-potentiometerwithlogarithmicresistivecharacteristicsoverthedevicerange.Eachpotentiometerprovides65wiperpositionswitha1dBincrementperstepanddevicemutewithatleast90dBofattenuation.Thespecificationsgiveninthisdatasheetonlyrefertodecibelmeasurements.Ifadesignerwishestocalculatethesevaluesinratiometricterms,aconversionisnecessary.Thisapplicationnotereviewstheconversionfromdecibeltoratiometric.TheformulaisgiveninExcelasanexample,……

摘要：本应用简要介绍了两种拓扑结构用于偏置光激光驱动器（开环和闭环），并演示了使用DS1847数字电位器与MAX3273激光驱动器的例子。激光模块设计人员可以使用一个固定电阻器，机械式电位器，数字电位器，或一个数字-模拟转换器（DAC）控制的激光驱动器的调制和偏置电流。一个可编程的方法（锅或DAC）的优点是可以应用（例如，用于补偿温度），制造过程可以实现自动化和数字化控制。使用的POTS可以更简单的方法是一个比一个DAC。可以用一个锅，有轻微的成本优势，但是这通常是不显着，相对其他部分的设计。使用DAC可提供的优势，包括改进的线性关系（翻译软件的实施和能力，达到所要求的精度，以纾缓），增加电路板密度，范围更广的决议，一个更好的优化范围，易用性与负电压激光驱动器和单位，以单位的一致性。Maxim>AppNotes>DIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSKeywords:MAX3273,DS1847,digitalpotentiometer,digipot,epot,laserdriver,vcseldriver,lasertransceiver,potentiometers,laserdrivers,potsDec03,2002APPLICATIONNOTE1794InterfacingDigitallyControlledPotsandResistorstoLaserDriversAbstract:Thisapplicationbriefdescribesthetwotopologiesusedtobiasopticallaserdrivers(openloopandclosedloop)anddemonstratesexamplesusingtheDS1847digitalpotentiometerandtheMAX3273laserdriver.Alasermoduledesignercanuseafixedresistor,mechanicalpot,digitalpot,oradigital-to-analogconverter(DAC)tocontrolthelaserdriver'smodulationandbiascurrents.Theadvantagesofaprogrammablemethod(POTorDAC)arethatthemanuf……

摘要：摘要：DS1847和DS1848具有两个256位的数字电阻和查找表（LUT），自动调整超过温度范围为-40°C的电阻至95°C。DS1848还具有128字节的用户EEPROM非易失（NV）的其他数据存储。可通过一个2线接口，它是用来沟通的芯片多达八颗。目前正在生产中的两个部分，可以转让。本应用笔记介绍了DS1847的温度系数（TC），特别是，为什么的85OPPM/°C间无偿TC并不适用于使用温度查找功能的系统。它还检查的LUT编程方程的准确性。本文件并不打算是关于如何使用DS1847或DS1848的教程，所以继续之前，请检查设备数据表。ApplicationNote181DS1847/DS1848TemperatureCoefficientSupplementwww.maxim-ic.comINTRODUCTIONTheDS1847andDS1848aretemperature-controlleddigitalresistors.ThesepartsfeatureanEEPROMlookuptablethatallowsaresistivefunctionR(T)tobeenteredintomemory,andthenthepartsareabletoself-adjusttheirresistanceasafunctionoftheambienttemperature.Theprimaryapplicationofthesepartsisinsertionintosystemsrequiringcalibrationovertemperaturethatcanbeaccomplishedwithavariableresistance.Thebenefitsofusingthemincludetheeliminationofbulkymechanicalpotentiometers,ICreliability,automationofsystemcalibration,andcompensa……

摘要：DS1847和DS1848有一个芯片上直接数字式温度传感器。温度存储在地址E2H和E3h的。本应用笔记介绍了如何转换成摄氏温度值十进制度数字温度数据。Maxim>AppNotes>DIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSTEMPERATURESENSORSandTHERMALMANAGEMENTKeywords:DS1847,DS1848,digitalpot,digipot,epot,temperature,laserdriver,VCSELdriver,temperatureSep09,2002compensation,digitalpotentiometersAPPLICATIONNOTE216HowtoInterpretDS1847/DS1848TemperatureReadingsAbstract:TheDS1847andDS1848haveanon-chipdirect-to-digitaltemperaturesensor.ThetemperatureisstoredinaddresslocationsE2handE3h.ThisapplicationnoteexplainshowtoconvertthedigitaltemperaturedataintoadecimaldegreesCelsiusvalue.TranslatingTemperaturesfromHextoDecimalTheprocedureforconvertingtemperaturevaluesfortheDS1847andDS1848beginswithreadingthehexvaluesstoredinbytesE2h(theMSBofthetempe……

摘要：数字电位器的温度特性不同于传统的机械电位器。温度对电位的绝对性的影响，必须考虑到这些类型的设备的设计时，为数字电位器具有绝对性，顺序上的温度超过10％的幅度可能会有所不同。其他因素，尤其是“抽头”，这实际上是一个传输门的阻力，还必须考虑到这些部件的设计时。一个稳定的设计在不同的配置概述。Maxim>AppNotes>COMMUNICATIONSCIRCUITSDIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSKeywords:digitalpot,digitpot,epot,DS1845,DS1855,xicor,digitalpotemtiometersJun07,2002APPLICATIONNOTE207DS1845/DS1855TemperatureCoefficientAnalysisAbstract:Thetemperaturecharacteristicsofdigitalpotentiometersdifferfromthoseoftraditionalmechanicalpotentiometers.Theeffectsoftemperatureontheabsoluteresistanceofthepotentiometermustbetakenintoconsiderationwhendesigningwiththesetypesofdevicesasadigitalpotentiometerhasanabsoluteresistance,whichmightvaryonanorderofmagnitudeof10%overtemperature.Otherconsiderations,especiallytheresistanceofthe"wiper"whichisinactualityatransmissiongate,……

摘要：本应用笔记介绍了如何找到基于一个电子控制的电位器（EPOT）为偏置电阻网络的戴维南等效电路。Maxim>AppNotes>DigitalPotentiometersGeneralEngineeringTopicsKeywords:EPOT,TheveninequivalentSep17,2001APPLICATIONNOTE804FindingtheTheveninEquivalentCircuitfortheEPOT-BasedOffsetResistorNetworkAbstract:ThisapplicationnoteexplainshowtofindtheTheveninequivalentcircuitforanoffsetresistornetworkbasedonanelectronicallycontrolledpotentiometer(EPOT).AdditionalInformation:EPOTApplications:OffsetAdjustmentinOp-AmpCircuitsTomodelthenetworkshownbelowinFigure1astheTheveninequivalentshownbelowinFigure2,findtheTheveninVoltage(Vth)andtheTheveninResistance(Rth).Inthiscase,VthisthesameasVos……

摘要：DS1867是一个数字电位器使用EEPROM存储器存储电位器设置，当设备断电。设备的写入过程发生在掉电周期，使该设备“记住”它的最后一个电位器设定在未来的电周期。读写EEPROM的过程，需要一段时间的最低数额，而这往往是长于电源设备在断电在一些应用中。如果是这种情况，需要外部电路提供电源，以保证在掉电周期写入EEPROM正确。给出了一个例子电路，显示此配置。Maxim>AppNotes>DIGITALPOTENTIOMETERSKeywords:digitpotEpot,EEPOT,digitalpot,DS1867,digitalpots,digitalpotentiometersApr30,2001APPLICATIONNOTE87DS1867PowerSupplyConditioningforEEPROMWiperStorageAbstract:TheDS1867isadigitalpotentiometerthatusesEEPROMmemorytostorepotentiometersettingswhenthedeviceispoweredoff.Thewriteprocesstothedeviceoccursduringthepower-downcyclesothatthedevice"remembers"it'slastpotentiometersettingduringthenextpower-upcycle.TheprocessofwritingEEPROMtakesaminimumamountoftime,whichcanoftenbelongerthanpowerisavailabletothedeviceduringpower-downinsomeapplications.Ifthisisthecase,externalcircuitryisrequiredtosupplypowerduringthepower-downcycleto……

摘要：本文演示使用DallasSemiconductor的8051兼容微处理器的DS87C520控制DS1803的硬件和软件解决方案。它描述了如何产生的2线通信信号需要通过两个微控制器上的端口引脚。一个基本的原理图显示之间的微处理器和DS1803的必要的连接，和8051汇编代码提供了一个小型应用程序，控制芯片的两个数字电位器使用不同的写入模式。每个写周期结束后，应用程序的DS1803读回的信息，并显示在电脑上通过一个串行端口，表现出正常运作的读取功能。在这篇文章中所描述的应用程序的源代码。ApplicationNote139ControllingaDS1803DigitalPotentiometerUsingan8051MicroprocessortoGenerate2-WireSignalswww.dalsemi.comIntroductionDallasSemiconductor’sDS1803isidealforsystemsthatrequiretheabilitytochangeabiasingresistance,current,orvoltage,withoutthemanualinterventionrequiredbyamechanicalpotentiometer.ItcanalsoprovideadualDigitaltoAnalogConverter(DAC)ifthepotentiometersarewiredasvoltagedividers.BecausetheDS1803requiresonlytwoI/Opinsfromamicroprocessortoaddressupto16potentiometers,itisperfectforapplicationswithlimitedI/Ocapacityandhighperformancerequirement……

摘要：温度特性的数字电位器有别传统机械电位器。设计使用这些类型的设备，因为数字电位器具有绝对的阻力，温度过10%的数量级可能会有所不同时，必须考虑对电位差计的绝对电阻温度的影响。其它考虑因素，尤其是抵抗"刮"这是在现实中传输门，还必须考虑采取与这些部件设计时。给出的设计在不同的配置中的稳定性概述。如果刮水器阻力也有解释的影响。Maxim>AppNotes>COMMUNICATIONSCIRCUITSDIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSKeywords:digitalpot,digitpot,epot,DS1845,DS1855,xicor,digitalpotemtiometersJun07,2002APPLICATIONNOTE207DS1845/DS1855TemperatureCoefficientAnalysisAbstract:Thetemperaturecharacteristicsofdigitalpotentiometersdifferfromthoseoftraditionalmechanicalpotentiometers.Theeffectsoftemperatureontheabsoluteresistanceofthepotentiometermustbetakenintoconsiderationwhendesigningwiththesetypesofdevicesasadigitalpotentiometerhasanabsoluteresistance,whichmightvaryonanorderofmagnitudeof10%overtemperature.Otherconsiderations,especiallytheresistanceofthe"wiper"whichisinactualityatransmissiongate,……

摘要：此应用程序说明的目的是显示的如何数字电位器可用于升压的直流-直流转换器的反馈回路中提供校准和/或调整输出电压的示例。示例电路使用MAX5025升压直流-直流转换器（能产生高达36V、最大的120mW)的DS1845、256的位置、非挥发性(NV)数字电位器的结合。对于此示例，所需的输出电压是伏，这从输入供应5V的生成。输出电压可（近伏)的35mV增量调整和跨越足够宽，帐户电阻、电位器和直流-直流转换器公差（27.6V36.7V）的范围。ApplicationNote226Step-UpDC-DCConverterCalibrationandAdjustmentUsingaDigitalPotentiometerwww.maxim-ic.comIntroductionThepurposeofthisapplicationnoteistoshowanexampleofhowadigitalpotentiometercanbeusedinthefeedbackloopofastep-upDC-DCconvertertoprovidecalibrationand/oradjustmentoftheoutputvoltage.TheexamplecircuitusesaMAX5025step-upDC-DCconverter(capableofgeneratingupto36V,120mWmax)inconjunctionwithaDS1845,256position,NVdigitalpotentiometer.Forthisexample,thedesiredoutputvoltageis32V,whichisgeneratedfromaninputs……

摘要：本应用指南介绍如何使用数字电位器生成使用MAX1776降压直流-直流转换器可调节电压供应。使用DS3903的参考设计显示功能产生1.25v和5.50V与电位器之间的受规管的供应能力允许所需的电压水平的1.8%内必须进行校正，供应。取决于当前的限制设置与MAX1776一起使用，设计是电流的有能力提供高达600mA。Maxim>AppNotes>DIGITALPOTENTIOMETERSPOWER-SUPPLYCIRCUITSKeywords:MAX1776,DS3903,digitalpot,digipot,epot,dc-dcconvertor,dc-dcconversion,dc-dcconverters,Dec10,2002digitalpotentiometersAPPLICATIONNOTE225UsingDigitalPotentiometersinAdjustableStep-DownDC-DCConverterDesignsAbstract:ThisapplicationnotedescribeshowtouseadigitalpotentiometertogenerateanadjustablevoltagesupplyusingaMAX1776step-downDC-DCconverter.AreferencedesignusingtheDS3903isshownthatfeaturestheabilitytoproducearegulatedsupplybetween1.25Vand5.50V,andthepotentiometerallowsthesupplytobecalibratedtowithin1.8%ofthedesiredvoltagelevel.DependingonthecurrentlimitsettingsusedwiththeMAX1776,thedesigniscapableofsup……

摘要：摘要：既DS1847和DS1848的特征两个256位数字电阻器和查找表(聿修）自动调整电阻温度范围为-40°C至95°c。DS1848还具有128个字节的EEPROM用户的其它数据的非易失性(NV)存储的功能。多达8个芯片可以访问通过一个单一的2线界面，用于芯片进行沟通。这两个部件目前在生产和可供购买。本文介绍了温度系数(TC)的DS1847，和特别是为什么85OPPM/°C无偿的TC并不适用于使用温度查找功能的系统。它还会检查聿修编程方程的准确性。本文档不是要将有关教程，说明如何使用DS1847或DS1848，所以设备数据表，在继续之前，请查看。ApplicationNote181DS1847/DS1848TemperatureCoefficientSupplementwww.maxim-ic.comINTRODUCTIONTheDS1847andDS1848aretemperature-controlleddigitalresistors.ThesepartsfeatureanEEPROMlookuptablethatallowsaresistivefunctionR(T)tobeenteredintomemory,andthenthepartsareabletoself-adjusttheirresistanceasafunctionoftheambienttemperature.Theprimaryapplicationofthesepartsisinsertionintosystemsrequiringcalibrationovertemperaturethatcanbeaccomplishedwithavariableresistance.Thebenefitsofusingthemincludetheeliminationofbulkymechanicalpotentiometers,ICreliability,automationofsystemcalibration,andcompensa……

摘要：一个简单的电路设计笔记介绍了如何使用两个按钮和三个微小的集成电路实现一个去抖，ESD保护的固态电位（EPOT）的。设计特点MAX5161digital电位器，MAX6308可编程复位IC，MAX6817开关反跳。Maxim>AppNotes>DigitalPotentiometersGeneralEngineeringTopicsMicroprocessorSupervisorCircuitsKeywords:digitalpotentiometer,potentiometer,EPOT,switchdebouncer,debounce,ESDprotectionDec05,2002APPLICATIONNOTE1802FewComponentsNeededforanESD-ProtectedSolid-StatePotentiometer(EPOT)SystemwithTwoPushbuttonsAbstract:ThisdesignnoteshowshowasimplecircuitusestwopushbuttonsandthreetinyICstoimplementadebounced,ESD-protectedsolid-statepotentiometer(EPOT).ThedesignfeaturestheMAX5161digitalpotentiometer,theMAX6308programmableresetIC,andtheMAX6817switchdebouncer.AsimilarversionofthisarticleappearedintheSeptember26,2002issueofEDNmagazine.Assystemsgrow……

摘要：一些数字系统控制位设置为高或低取决于系统的配置。一个常见的例子是在一台PC配置跳线或DIP开关设置光盘驱动器是一个ISA总线上的船长或奴隶。在其他应用程序，这些配置位可启用或禁用功能，如马达驱动器或灯泡时功率为允许处理器时间采取控制系统，使安全或电源预算的原因，有秩序地功能。本应用笔记演示如何备用非易失（NV）数字电位器可以用于数字配置位。Maxim>AppNotes>DIGITALPOTENTIOMETERSGENERALENGINEERINGTOPICSKeywords:NV,nonvolatile,digipot,digitalpotentiometer,digitalpots,digitalconfiguration,epot,DS3903,Mar03,2003DS1846APPLICATIONNOTE235UsingSpareNVDigitalPotsasNVDigitalConfigurationBitsAbstract:SomedigitalsystemshavecontrolbitsthataresettoHIorLOdependingontheconfigurationofthesystem.AcommonexampleinaPCisaconfigurationjumperordipswitchthatsetswhichdiscdriveisthemasterorslaveonanISAbus.Inotherapplications,theseconfigurationbitsmayenableordisableafunctionsuchasamotordriveorlampaduringpower-uptoallowaprocessortimetotakecontrolofthesystemandenablefunctionsinanorderlymannerforsafetyorpowerbudgeti……