标签: ds1802

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,……