LinearLTC2983多传感器高精度数字温度测量系统方案

1、Lin ear公司的LTC2983能测量各种温度传感器并以数字输岀，分辨率0.001 C，精度0.1 C，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Linduino One (DC2026) 的温 度测量系统DC2296A特性，电路图和材料清单.The LTC?2983

2、measures a wide variety of temp erature sen sors and digitally out puts the result, in C or F, with 0.1 C accuracy and 0.001 C resolution. The LTC2983 can measure the temp erature of virtually all sta ndard (type B, E, J, K, N, S, R, T) or custom thermocou pl es, automatically compen sate for cold j

3、un cti on temp eratures and lin earize the results. The device can also measure temp erature with sta ndard 2-, 3-, or 4-wire RTDs, thermistors, and diodes.It has 20 recon figurable an alog inp uts en abli ng many sen sor conn ecti ons and con figurati on op ti ons. The LTC2983 in cludes excitati on

4、 curre nt sources and fault detecti on circuitry approp riate for each type of temp erature sen sor.The LTC2983 allows direct in terfac ing to grou nd refere need sen sors without the n eed for level shifters, n egative supply voltages, or exter nal amp lifiers. All sig nals are buffered and simulta

5、neously digitized with three high accuracy, 24-bit 艺 ADCdriven by an internal10ppm/ C (maximum) referenee.LTC2983主要特性：Directly Digitize RTDs, Thermocou ples. Thermistors, =and DiodesSi ngle 2.85V to 5.25V SupplyResults Reported inC or F20 Flexible Inp uts Allow In tercha nging Sen sorsAutomatic Ther

6、mocou ple Cold Jun cti on Compen sati onBuilt-I n Sta ndard and User- Programmable Coefficie nts for Thermocou ples, RTDs and ThermistorsCon figurable 2-, 3-, or 4-Wire RTD Co nfigurati onsMeasures Negative Thermocou ple VoltagesAutomatic Bur n Out, Short-Circuit and Fault Detecti onBuffered Inp uts

7、 Allow Exter nal P rotectio nSimulta neous 50Hz/60Hz Rejecti onIn cludes 10ppm/ C (max) Refere nee (I-Grade)LTC2983 应用:Direct Thermocou ple Measureme ntsDirect RTD Measureme ntsDirect Thermistor Measureme ntsCustom Sen sor App licati onsCHlCHl lala CHTDCHTDCOMCOMB-B-图1. LTC2983框图W書獗副用W轴謝収柴目卑862011 -

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10、 1 -3 3.7J JJr1TttPfETttPfE WOflfWOflf SETSSETS OFOF UNVtPSAlUNVtPSAl f fSrN30SrN30 IKPUTIKPUTPSEJlStPSEJlSt1?1?nCHMJnCHMJ SIDHSIDHiUVIiUVI PP ftiuftiu 4 4讯RERE RTDRTDLOffLOff TOTO RESET)RESET) -”41415R5R INTERFACEINTERFACEChlitChlitVtBVtBCM?CM?QQGQGQCHSCHS(B(BlJC59eilJC59eicmcmVpiEMUiVpiEMUi臨E E肿CH

11、iCHi畑 avr-avr-的 F F TOTO ENZOENZO山0 0COMCOMJJFiRaUPIJJFiRaUPIfit&CTfit&CTtstscuncunSCISCICKCKIEIEH H3030HiiSiS1111lele1 1.直旦卫乜1?1? TVMTVM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Lin dui no One (DC2026)The DC2296 is the starter kit for dem

12、 on strat ing the p erforma nee and ease of use of the LTC?2983, which is a compi ete temp erature measureme nt system on a ehi p.This kit in cludes the DC2209 (ma in demo circuit con tai ning the LTC2983) and the DC2210 (a simple exp erime nt circuit allow ing bread board in g). I n additi on to th

13、e starter dem on strati on kit, sen sor sp ecific dem on strati on boards highlight ing the p erforma nee of RTDs, thermistors, or thermocou ples are also available.傲壹电子 (AO-Electronics) 官网： 中文网： ? Uni versal Temp erature Measureme nt Board-C2211? Thermocou ple BoardPC2212? Dedicated RTD Board -DC22

14、13? Dedicated Thermistor Board DC2214The DC2209 is a member of the QuikEval? family of dem on stration boards. It is desig ned toallow easy evaluati on of the LTC2983 and may be conn ected to any one of the sen sor daughter boards.These daughter boards allow evaluati on of the various LTC2983 sen so

15、r types (see Figure 1).For the serial digital in terface, theDC2209 may be conn ected to the DC2026 Lin dui no?On e.EiriltlaiiEiriltlaiiQuitQuit剛* GUIGUISoftwareSoftwareCrttCrtt RrRr嗦nUEnUE机皿IDEIDEfCfC CQdrigCrrKm*1唸 碩唧紿.ft EEEE二匸“ * ，mi = - 看ELH U U- -宀亠帚:空瓏.：TWjw9SHOaiTWjw9SHOaiiE 7弄心盘P 聊，g答 遂Isyw

16、O S2-僉一聲.F-m.F-m*食*F*泊图5.温度测量系统 DC2296A外形图TmSHKAiTmSHKAi JDJD ieffiaieffiaThe DC2296 is the starter kit for dem on strat ing the p erforma nee and ease of use of the LTC?2983, which is a compi ete temp erature measureme nt system on a ehi p. This kit in eludes the DC2209 (mai n demo circuit eon tai

17、ning the LTC2983) and the DC2210 (a sim pie exp erime nt circuit allow ing bread board in g). I n additi on to the starter dem on strati on kit, sensor sp ecific dem on strati on boards highlighti ng the p erforma nee of RTDs, thermistors, or thermocou pies are also available.:A*osejnA*osejni i *汁”I

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22、CH3CH3 V V CH2CH2 CHICHI *4*4图8.DC2210 实验板电路图J2J3X4X57CommonCommon ConnectionConnection BusBus forfor SharedShared RenseRenseroociogroociog DEMODEMO 隔TRAHM flOAflDflOAflD曲V VPP . .JIH*JIH*_-_盟器*誥器*UMIVIRiAllMPLTUMIVIRiAllMPLT4K4K IHLKt(/OtOUFI.t5IHLKt(/OtOUFI.t5S S WlHtRTDWlHtRTD4 4 WiftLWiftL fflIO

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