标签: ds1845

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……

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……

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：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：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,……