A5191HRT型HART调制解调器 毕业论文外文翻译

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1、西安工程大学本科毕业设计（译文）译文原文题目：A5191HRTAMISHART™Modem译文题目：A5191HRT型HART调制解调器学院：电子信息学院专业班级：自动化2009级04班学生姓名：学号：4090501043522西安工程大学本科毕业设计（译文）A5191HRTAMISHART™Modem1.FeaturesCanbeusedindesignspresentlyusingtheSYM20C15Single-chip,half-duplex1200bitspersecondFSKmodemBell202shiftfrequenciesof1200Hzand220

2、0Hz3.3V-5.0VpowersupplyTransmit-signalwaveshapingReceiveband-passfilterLowpower:optimalforintrinsicallysafeapplicationsCMOScompatibleInternaloscillatorrequires460.8kHzcrystalorceramicresonatorMeetsHARTphysicallayerrequirementsIndustrialtemperaturerangeof-40°Cto+85°CAvailablein28-pinPLCCand

3、32-pinLQFPpackages2.DescriptionTheA5191HRTisasingle-chip,CMOSmodemforuseinhighwayaddressableremotetransducer(HART)fieldinstrumentsandmasters.ThemodemandafewexternalpassivecomponentsprovideallofthefunctionsneededtosatisfyHARTphysicallayerrequirementsincludingmodulation,demodulation,receivef

4、iltering,carrierdetect,andtransmit-signalshaping.TheA5191HRTispin-compatiblewiththeSYM20C15.SeethePinDescriptionandFunctionalDescriptionsectionsfordetailsonpincompatibilitywiththeSYM20C15.TheA5191HRTusesphasecontinuousfrequencyshiftkeying(FSK)at1200bitspersecond.Toconservepowerthereceiveci

5、rcuitsaredisabledduringtransmitoperationsandviceversa.Thisprovidesthehalf-duplexoperationusedinHARTcommunications.22西安工程大学本科毕业设计（译文）Figure2-128-PinPLCCPinoutDiagrams(green&non-green)Figure2-232-PinLQFPPinoutDiagrams(green&non-green)Table2-1PinoutSummary28-PinPLCC,A5191HRTP/Pg(12197-504/508

6、)PinN0.SignalNameTypePindescription1TEST1InputConnecttoVSS2TEST2-Noconnect3TEST3-Noconnect4TEST4-Noconnect5TEST5InputConnecttoVSS6INRESETInputResetalldigitallogicwhenlow7TEST7InputConnecttoVSS8TEST8InputConnecttoVSS9TEST9InputConnecttoVSS10OTXAOutputOutputtransmitanalog,FSKmodulatedHARTtra

7、nsmitsignalto4-20mAloopinterfacecircuit22西安工程大学本科毕业设计（译文）11IAREFInputAnalogreferencevoltage12ICDREFInputCarrierdetectreferencevoltage13OCBIASOutputComparatorbiascurrent14TEST10InputConnecttoVSS15VDDAPowerAnalogsupplyvoltage16IRXAInputFSKmodulatedHARTreceivesig