标签: pot

howtoincreasethebandwidthofdigitalpotentiometers10xto100x……

Abstract:Thisapplicationbriefdescribeshowtocontrolanalogphaseshiftdigitallyusingacombinationofdigitalpotentiometersandstandardoperationalamplifiers(opamps).Itisintendedtoserveasadesignexampleforengineersneedingtoimplementdigitalphaseshiftinacircuitrywithnospecificapplication.Itpresentscommonopampphaseshiftconfigurationsandhowtoimplementthemusingadigitalpotentiometerinplaceofmechanicalpotentiometersorfixedresistors.Formulasforcalculatingphaseshiftareincludedintheapplicationnote.ApplicationNote184Digitally-ControlledPhaseShiftUsingtheDS1669www.maxim-ic.comCONTROLLINGPHASESHIFTDIGITALLYAlteringthephaseresponseofasignalwithoutchangingitsamplitudecharacteristicsiscommonlyperformedusinganallpassfilter,asinFigure1.TheresponseofthiscircuitisgivenbyAsimplephaseshiftcircuitcanbeimplementedusinganallpassfilter.Figure1AsthesignalfrequencyvariesfromDCtoinfinity,thephaseshiftwillvaryfrom0to+180degrees.YoucanalsoseethatbyvaryingR1,thephaseshiftatagivenfrequ……

Abstract:Alasermoduledesignercanuseafixedresistor,mechanicalpot,digitalpot,oradigital-to-analogconverter(DAC)tocontrolthelaserdriver'smodulationandbiascurrents.Theadvantagesofaprogrammablemethod(POTorDAC)arethatthemanufacturingprocesscanbeautomatedanddigitalcontrolcanbeapplied(e.g.,tocompensatefortemperature).UsingPOTscanbeamoresimpleapproachthanaDAC.TherecanbeaslightcostadvantagetousingaPOT,butthisisusuallynotsignificantrelativetootherpiecesofthedesign.UsingaDACcanofferadvantages,includingimprovedlinearity(translatingtoeaseofsoftwareimplementationandabilitytohittherequiredaccuracy),increasedboarddensity,awiderrangeofresolutions,abetteroptimizationrange,easeofusewithanegativevoltagelaserdriver,andunit-to-unitconsistency.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSDIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSKeywords:laserdriver,pots,digitalpot,digipot,lasermodulation,digitalpotentiometers,lasermodulation,Mar26,2002DS1845,DS1848APPLICATIONNOTE1010MethodsofControllingLaserDrivers:POTsandDACsAbstract:Alasermoduledesignercanuseafixedresistor,mechanicalpot,digitalpot,oradigital-to-analogconverter(DAC)tocontrolthelaserdriver'smodulationandbiascurrents.Theadvantagesofaprogrammablemethod(POTorDAC)arethatthemanufacturingprocesscanbeautomatedanddigitalcontrolcanbeapplied(e.g.,tocompensatefortemperature).UsingPOTscanbeamoresimpleapproachthanaDAC.Therecanbeaslightcostadvantagetou……

Abstract:TheDS1802audiopotentiometercontainstwodigitallycontrolledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchangeperincrement.Thisapplicationnotedescribesusingitinapush-buttoncontrolledaudiopreamplifiercircuit.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUDIOCIRCUITSDIGITALPOTENTIOMETERSKeywords:digitalpotentiometers,preamplifier,preamp,digitalpot,xicorMay03,2002APPLICATIONNOTE161UsingaDS1802Push-ButtonDigitalPotentiometertoCreateanAudioPreampwithAttenuatorAbstract:TheDS1802audiopotentiometercontainstwodigitallycontrolledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchangeperincrement.Thisapplicationnotedescribesusingitinapush-buttoncontrolledaudiopreamplifiercircuit.IntroductiontotheDS1802DualLogarithmicAudioPotentiometerTheDS1802AudioPotentiometercontainstwodigitally-controlledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchan……

摘要：DS1802音频电位器包含两个电位器，和功能产生的增量每1杜比变化的对数锥度。本应用指南描述了在按钮控制音频前置放大器电路中使用它。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUDIOCIRCUITSDIGITALPOTENTIOMETERSKeywords:digitalpotentiometers,preamplifier,preamp,digitalpot,xicorMay03,2002APPLICATIONNOTE161UsingaDS1802Push-ButtonDigitalPotentiometertoCreateanAudioPreampwithAttenuatorAbstract:TheDS1802audiopotentiometercontainstwodigitallycontrolledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchangeperincrement.Thisapplicationnotedescribesusingitinapush-buttoncontrolledaudiopreamplifiercircuit.IntroductiontotheDS1802DualLogarithmicAudioPotentiometerTheDS1802AudioPotentiometercontainstwodigitally-controlledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchan……

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：DS1802音频电位器包含两个数字控制电位器和功能产生每递增1分贝变化对数锥度。本应用笔记介绍使用它在一个按钮控制音频前置放大电路。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUDIOCIRCUITSDIGITALPOTENTIOMETERSKeywords:digitalpotentiometers,preamplifier,preamp,digitalpot,xicorMay03,2002APPLICATIONNOTE161UsingaDS1802Push-ButtonDigitalPotentiometertoCreateanAudioPreampwithAttenuatorAbstract:TheDS1802audiopotentiometercontainstwodigitallycontrolledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchangeperincrement.Thisapplicationnotedescribesusingitinapush-buttoncontrolledaudiopreamplifiercircuit.IntroductiontotheDS1802DualLogarithmicAudioPotentiometerTheDS1802AudioPotentiometercontainstwodigitally-controlledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchan……

摘要：本文件的目的是提供一个考试的DS1802双数字potentiomter的音频特性。测试电路开发与抽头点之间，通道间匹配，或两个电位器雨刷器，总谐波失真（THD），互调失真（IMD）和串扰之间的跟踪测量绝对错误的目标。ApplicationNote88AudioCharacterizationReportfortheDS1802DualDigitalAudioPotentiometerwww.dalsemi.comPURPOSEThepurposeofthisdocumentistoprovideanexaminationoftheDS1802DualDigitalPotentiometer’saudiocharacteristics.Testcircuitsweredevelopedwiththegoalofmeasuringabsoluteerrorbetweentappoints,inter-channelmatchingortrackingbetweenthetwopotentiometerwipers,totalharmonicdistortion(THD),intermodulationdistortion(IMD),andcross-talk.Additionally,dataisprovidedformutelevelsforeachpotentiometer,aswellasactiveandstandbycurrentasafunctionoftemperaturea……

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：对所有的低频振荡器配置，维恩桥是最容易使用的。它是可靠的，使用标准组件，提供了一个很好的正弦波，并围绕它设计的运算放大器的类型是相当免疫。然而，文氏桥被误解和过于简单，导致设计师挫折。本文介绍的理论和实际使用维恩电桥振荡器，以及如何使电路更稳定和更factory-/user-flexible。Maxim>AppNotes>DIGITALPOTENTIOMETERSKeywords:WienBridge,DigitalPotentiometer,digitalpot,oscillatorMay24,2006APPLICATIONNOTE3846AnalysisofaDigitallyControlledWien-BridgeOscillatorAbstract:Ofallthelow-frequencyoscillatorconfigurations,theWienbridgeistheeasiesttouse.Itisreliable,usesstandardcomponents,givesagoodsinewave,andisfairlyimmunetothetypeofopamparoundwhichitisdesigned.AWienbridgecan,however,bemisunderstoodandoversimplified,leadingtodesignerfrustration.ThisarticledescribesthetheoryandpracticalitiesofusingaWien-bridgeoscillator,andhowtomakethecircuitmorestableandmorefactory-/user-flexible.TheWien-BridgeCircuitThecircuitofastandardWien-br……

摘要：本文讨论了一些与数字电位器设计时的关键问题和常见问题。主题雨刷当前（以及它如何影响动态范围），雨刮器电压，温度系数。如何减少或消除不必要的错误提示也包括在内。Maxim>AppNotes>DIGITALPOTENTIOMETERSGENERALENGINEERINGTOPICSKeywords:digitalpot,digitalpotentiometer,digitalpotFAQ,digitalpotbasics,designing,potentiometersMar25,2003APPLICATIONNOTE1956TipstoRememberWhenDesigningwithDigitalPotentiometersAbstract:Thisarticlediscussessomeofthekeyissuesandcommonquestionsthatarisewhendesigningwithdigitalpotentiometers.Topicsincludewipercurrent(andhowitaffectsdynamicrange),wipervoltages,andtemperaturecoefficients.Tipsonhowtoreduceoreliminateunwantederrorsarealsoincluded.qMoreappnotesfordigitalpotentiometerapplicationsqDigitalpotentiometerproductsThisarticlehighlightssomeofthekeyissuestoaddresswhendesigningwithdigitalpots.Configur……

摘要：数字电位器（盆）提供音频音量（增益）控制应用的优势，可以取代笨重的机械电位器，尤其是在手持便携设备，如MP3播放器，掌上电脑，手机，移动互联网设备，或立体声调幅/调频收音机。本文档介绍了音频控制，如对数锥盆（日志盆）提供的数字电位器的类型。它会检查使用日志锥盆和音频放大器的几种常见的设计，评估他们的优点和缺点，并建议电路设计。Maxim>AppNotes>AudioCircuitsDigitalPotentiometersKeywords:digitalpot,digitalpotentiometer,audiovolumecontrol,MAX5407,MAX5408,MAX5409,MAX5410,MAX5411,volumecontrol,Dec26,2002volumeadjust,digitalvolumeadjustment,logpots,digitallogpots,logarithmictaper,logarithmic,potentiometersAPPLICATIONNOTE1828AudioGainControlUsingDigitalPotentiometersAbstract:Digitalpotentiometers(pots)offeradvantagesforaudiovolume(gain)controlapplicationsandcanreplacebulkymechanicalpots,especiallyinhandheldportabledevicessuchasMP3players,PDAs,cellphones,mobileInternetdevices,orstereoAM/FMradios.Thisdocumentdescribesthetypesofdigitalpotsavailableforaudiocontrolsuchaslogarithmictaperpots(logpots).Itexaminessev……

摘要：DS1802音频电位器包含两个数字控制电位器和功能产生每递增1分贝变化对数锥度。本应用笔记介绍使用它在一个按钮控制音频前置放大电路。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUDIOCIRCUITSDIGITALPOTENTIOMETERSKeywords:digitalpotentiometers,preamplifier,preamp,digitalpot,xicorMay03,2002APPLICATIONNOTE161UsingaDS1802Push-ButtonDigitalPotentiometertoCreateanAudioPreampwithAttenuatorAbstract:TheDS1802audiopotentiometercontainstwodigitallycontrolledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchangeperincrement.Thisapplicationnotedescribesusingitinapush-buttoncontrolledaudiopreamplifiercircuit.IntroductiontotheDS1802DualLogarithmicAudioPotentiometerTheDS1802AudioPotentiometercontainstwodigitally-controlledpotentiometersandfeaturesalogarithmictaperthatproducesa1dBchan……

摘要：本应用笔记的目的是展示如何DS1847/48数字电阻校准常数可以再生。本应用笔记假定读者熟悉的编程DS1847或DS1848数据表的查找表节。本应用笔记将介绍所需的测量，以及需要重新校准常数的计算。最后，本应用笔记将显示例如电子表格计算器（可以在本应用笔记中发现一个链接），可以用来执行计算多次测量一次输入。Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSDIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSPOWER-SUPPLYCIRCUITSKeywords:digitalresistor,digitalpot,digitalpotentiometer,digipot,DS1847,DS1848,potentiometersMar10,2003APPLICATIONNOTE233RegeneratingtheDS1847/DS1848ResistorCalibrationConstantsAbstract:ThepurposeofthisapplicationnoteistoshowhowtheDS1847/48digitalresistorcalibrationconstantscanberegenerated.ThisapplicationnoteassumesthatthereaderisfamiliarwiththeProgrammingtheLookupTablesectionoftheDS1847orDS1848datasheets.Thisapplicationnotewilldescribethemeasurementsrequired,aswellasshowthecalculationsneededtoregeneratethecalibrationconstants.Lastofall,thisapplicationnote……

摘要：环境温度，监视VCC时，DS1854，DS1857和DS1858和外部模拟输入。本应用笔记介绍如何解释在主设备SRAM中存储的值，并将其转化成温度和电压。2的补码转换的审查也包括在内。Maxim>AppNotes>DIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSTEMPERATURESENSORSandTHERMALMANAGEMENTKeywords:DS1854,DS1857,DS1858,digitalpot,digitalpotentiometer,digipot,potentiometersDec10,2002APPLICATIONNOTE228HowtoInterpretDS1854,DS1857,andDS1858TemperatureandVoltageReadingsAbstract:TheDS1854,DS1857,andDS1858monitorVCC,ambienttemperature,andexternalanaloginputs.ThisapplicationnoteexplainshowtointerpretthevaluesstoredintheMainDeviceSRAMandtranslatethemintotemperatureandvoltages.Areviewof2'scomplementconversionisalsocovered.TranslatingTemperaturefromBinarytoDecimalTheprocedureforconvertingtemperaturevaluesfortheDS1854/57/58beginswithreadingthevaluesstoredinbytes60h(MSBo……

摘要：在外行人的术语，本文介绍了基于光纤通信的日益增长的重要性，并说明实施这项技术正在使用的各种标准（SDH，SONET和FDDI）。作为一个年轻的技术，可以改进，既提高该技术的性能和降低成本，在生产过程中。数字电位器提供了一种手段，关键的激光驱动器和反馈电路设置为最佳性能。花盆内温度传感机制，可以用来作为温度的函数可能发生的任何参数变化的监测和补偿这些电路。这些数字电位器也可以用于自动化生产校准程序进行一次手动使用机械电位器或固定电阻挑选。这不仅降低了生产成本，这些激光驱动器也可以用来提高设备的可靠性和质量，消除人为错误的因素校准过程。达拉斯半导体电位讨论包括DS1845，DS1846，DS1847和DS1848。Maxim>AppNotes>DIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSKeywords:SONET,SDH,ATM,FDDI,fasterethernet,gigabitethernet,laserdriver,digitalpot,laserdrivers,Oct21,2002digitalpotentiometers,digipotsAPPLICATIONNOTE1769BehindtheLightShowinOpticalTransceiversAbstract:Thisarticleexplains,inlaymen'sterms,thegrowingimportanceofoptic-basedtelecommunicationsanddescribesthevariousstandards(SDH,SONET,andFDDI)thatarebeingusedtoimplementthistechnology.Asayoungtechnology,improvementscanbemadetobothimprovetheperformanceofthetechnologyandreducecostsinmanufacturingprocess.Digitalpotentiometersprovideameanstosetcriticallaserdriverandfeedbackcircuitsforoptimalperformance.Temperaturesensingmec……

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：激光模块的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）来控制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>A/DandD/ACONVERSION/SAMPLINGCIRCUITSDIGITALPOTENTIOMETERSFIBER-OPTICCIRCUITSKeywords:laserdriver,pots,digitalpot,digipot,lasermodulation,digitalpotentiometers,lasermodulation,Mar26,2002DS1845,DS1848APPLICATIONNOTE1010MethodsofControllingLaserDrivers:POTsandDACsAbstract:Alasermoduledesignercanuseafixedresistor,mechanicalpot,digitalpot,oradigital-to-analogconverter(DAC)tocontrolthelaserdriver'smodulationandbiascurrents.Theadvantagesofaprogrammablemethod(POTorDAC)arethatthemanufacturingprocesscanbeautomatedanddigitalcontrolcanbeapplied(e.g.,tocompensatefortemperature).UsingPOTscanbeamoresimpleapproachthanaDAC.Therecanbeaslightcostadvantagetou……