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1、Linear公司的LTC2983能测量各种温度传感器并以数字输出,分辨率0.001℃,精度0.1℃,可以测量2/3/4线RTD,温度调节器和二极管.器件包括20个可配置的模拟输入端,激励电流源和对每种传感器的故障检测电路.工作电压2.85V-5.25V,主要用在热电偶,RTD和温度调节器的温度直接测量,以及专用传感器应用.本文介绍了LTC2983主要特性,框图,典型应用电路,以及包括LTC2983入门板,主板(DC2209),20输入分接板(DC2210)和LinduinoOne(DC2026)的温度测量系统DC2296A特性,电路图和材料清单.TheLTC?2983
2、measuresawidevarietyoftemperaturesensorsanddigitallyoutputstheresult,in ℃or°F,with0.1℃accuracyand0.001℃resolution.TheLTC2983canmeasurethetemperatureofvirtuallyallstandard(typeB,E,J,K,N,S,R,T)orcustomthermocouples,automaticallycompensateforcoldjunctiontemperaturesandlinearizetheresults.T
3、hedevicecanalsomeasuretemperaturewithstandard2-,3-,or4-wireRTDs,thermistors,anddiodes.Ithas20reconfigurableanaloginputsenablingmanysensorconnectionsandconfigurationoptions.TheLTC2983includesexcitationcurrentsourcesandfaultdetectioncircuitryappropriateforeachtypeoftemperaturesensor.TheLT
4、C2983allowsdirectinterfacingtogroundreferencedsensorswithouttheneedforlevelshifters,negativesupplyvoltages,orexternalamplifiers.Allsignalsarebufferedandsimultaneouslydigitizedwiththreehighaccuracy,24-bitΔΣADC’s,drivenbyaninternal10ppm/℃(maximum)reference.LTC2983主要特性: DirectlyDigitizeRTD
5、s,Thermocouples,Thermistors,=andDiodes Single2.85Vto5.25VSupply ResultsReportedin ℃or°F 20FlexibleInputsAllowInterchangingSensors AutomaticThermocoupleColdJunctionCompensation Built-InStandardandUser-ProgrammableCoefficientsforThermocouples,RTDsandThermistors Configurable2-,3-,or4-WireR
6、TDConfigurations MeasuresNegativeThermocoupleVoltages AutomaticBurnOut,Short-CircuitandFaultDetection BufferedInputsAllowExternalProtection Simultaneous50Hz/60HzRejection Includes10ppm/℃(max)Reference(I-Grade)LTC2983应用: DirectThermocoupleMeasurements DirectRTDMeasurements DirectThermist
7、orMeasurements CustomSensorApplications图1.LTC2983框图图2.LTC2983带自动冷端补偿的热电偶测量电路图图3.LTC2983典型RTD/电热调节器应用电路图图4.LTC2983通用输入共享热电偶,二极管,电热调节器,三线RTD和4线RTD应用电路图温度测量系统DC2296A包括LTC2983入门板,主板(DC2209),20输入分接板(DC2210)和LinduinoOne(DC2026)TheDC2296isthestarterkitfordemonstratingtheperformanceand
