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当前位置:首页 > 建筑/环境 > 工程监理 > ADS1282及其在单通道地震数据采集单元中的应用
:2010-04-12:201004044:(50727401);(KM200810016013):(1966—),,,,。:。ADS12821,2,2,1(1.100044;2.()100083):,32、/ADS1282,、MSP430F123,、、。ADS1282,,,。、、。:ADS1282;MSP430F123;;:TN79+2:A1674-6236(2010)10-0176-04ADS1282anditsapplicationinsingle-channelseismicsamplingunitWANGHuai-xiu1,2,ZHUGuo-wei2,WANGDong1(1.BeijingInstituteofCivilEngineeringandArchitecture,Beijing100044,China;2.TheKeyLaboratoryofCoalResourcesofMinistryofEducation,ChinaUniversityofMining&Technology,Beijing100083,China)Abstract:Tomeettheneedsofhigh-precisionseismicdataacquisition,asingle-channelseismicdataacquisitionunitwasdesigned,whichusedthe32-bithighintegrationanalog-to-digitalADS1282asacoreandthehigh-performance,lowpowermicrocontrollerMSP430F123astheacquisitioncontroller.Theunitachievedsuchfunctions:single-channelseismicsignalsignalspickedup,dataconversion,storageandtransmission.ThedesignunitefullyusedwiththedesignADS1282chipintegration,withthecorrespondinganti-jammingmeasures,notonlysimplifiedthecircuitdesign,butalsoensuredthequalityofsignalacquisitionandsystemstability.Theacquisitionunitissuitablefortheapplicationwhichhavestrictrequirementsinpower,volume,precision.Keywords:ADS1282;MSP430F123;single-channel;seismicsamplingunit。,、,、、,/ADS1282,、、,,、、。ADS1282、、、。ADS1282/、。1ADS12821.1ADS1282、32、△-∑(ADC)。4、△-∑,;,;(MUX),;(PGA),、;;。ADS1282-40~+85℃,+125℃,、、。ADS1282[1-2]:1):,250SPS(RSN)130dB,,250SPS(RSN)127dB;2):(THD)-122dB,(INL)0.5ppm;3)(PGA):5nV/Hz姨;4)2(MUX);ElectronicDesignEngineering18Vol.1810No.10201010Oct.2010-176-5)4、△-∑;6):Sinc+FIR+IIR,FIR,250SPS4KSPS;7);8):25mW,17mW,90μW,10μW;9)。1.2ADS128228TSSOP,1。ADS1282:CLK:;SCLK:;DRDY:,;DOUT、DIN:、;MCLK、M1、M0:,MCLK,M1、M0,,;SYNC:,;MFLAG:,0,1;DGND:,;CAPN、CAPP:PGA,CAPPCAPN10nF;AINP2、AINN2,AINP1、AINN1:、;AVDD、AVSS:、,(+5V)(±2.5V);VREFN、VREFP:、;PWDN:,;RESET:,;DVDD::+1.8~+3.3V;BYPAS::DGND1μF。1.3ADS12822,(MUX)、(PGA)、△-∑、、、、SPI。MUX5:1、2、1、2、400Ω;、CMOS(PGA),PGA1~64,。PGA300Ω,CAPPCAPNCOG1ADS1282Fig.1PinconfigurationofADS12822ADS1282Fig.2BlockdiagramofADS1282,,fp=1/6.3×600×C[1-2]。ADS1282、4Δ-Σ,22,。VIN(VIN=(AINP-AINN)PGA)VREF(VREF=VREFP-VREFN),1s,90%100%,1s,,,,,12(fMOD),62(FIR)[2-3]。、,。CONFIG0FILTR[1:0]=00,,M0、M1,MCLK,,ADS1282-177-《》2010104ADS1282Fig.4InterfacecircuitbetweenseismicdetecterandADS1282,。,,,,。3:1、sinc,1、32(FIR)1、(HPF)。3,,(),,sinc,1。SYNC,ADS1282。RESET,PWDN,PWDN,,(STANDBY)()。ADS1282(AVDDAVSS),1.8~3.3V,+5V±2.5V,。22.1,、,,,、,。、/、、、,、、、,(MEMS)ADXL001,、、16RISCMSP430F123,,132KB×8FRAM,/FRAM,,3,,[5-6]。2.2ADS1282,(),,、,ADS1282,。,、、,ADS1282(),,ADS1282。4ADS1282,ADS1282±2.5V。R1、R2C1、C2、C3,,R1、R20.1%。C3C1C1、C2,C3C110,C1、C220。ADS1282,PCB、、,,。ADS1282,1Tab.1DigitalfilterselectionFILER[1:0]00,01sinc10sinc+FIR11sinc+FIR+HPF()3Fig.3Hardwarecompositionofsingle-channelseismicsamplingunit-178-ESD[4-7]。REF5025ADS1282,R5、C7,C8,C8ADS1282[8]。R3、R4300ΩADS1282,,PGA,。,R3、R40.1%,[2,4]。C4PGA,,,25kHz。3ADS1282,ADS128232,,‘0’,‘1’。ADS12823SPI,3:SCLK、DINDOUT。,DRDY,DRDY,。SCLKDIN,SCLKDOUT,SCLK64DRDY,SPI,SCLK。SCLK,SCLK[1,5]。5MSP430F123ADS1282,R1~R847Ω,,,RESET,R1MSP430F123RST,DOUTADS1282,R4DOUT。4ADS1282/,、、、,、,,。ADS1282Δ-Σ/,,、A/D,,,、(PCB):1)PCB、、,,。2),AG-NDDGND。3),50Ω,(),,DVDDGND。4),。:[1]TexasInstruments.High-resolutionanalog-to-digitalconverterADS1282Datasheet[EB/OL].(2009-03-23)[2010-04-05].[2].[M].:,2002[3],.24ADS1274/ADS1278[J].,2008,16(5):53-56.WANGHuai-xiu,ZHUGuo-wei.Highperformance,24-bitanalog-to-digitalconverterADS1274/ADS1278andit'sapplica-tion[J].ElectronicDesignEngineering,2008,16(5):53-56.[4]KitchinC,CountsL.[M].2.,,.:,2005.[5].MSP430[M].:,2002.[6],,.[J].,2008(S2):247-252.WANGHuai-xiu,LIUHong-mei,ZHUGuo-wei.Develop-mentofnewessentialsafetydistributedmine3-componentseismograph[J].JournalofElectronicMeasurementandInstrument,2008(S2):247-252.[7],,.24A/DADS1255[J].:,2006(5):1036-1040.HEJian,HUYan,ZHOUChao.24-BitA/DconverterADS1255andit'sapplication[J].Journalofsouthwestuniver-sityfornationalities:NaturalScienceEdition,2006(5):1036-1040.[8]TexasInstruments.Low-noise,verylowdrift,precisionvolt-agereference,REF5025Datasheet[EB/OL].(2009-04-20)[2010-04-05].,ADS1282-179-
本文标题:ADS1282及其在单通道地震数据采集单元中的应用
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