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ADIADXRS624陀螺仪传感方案关键字：工业控制,机器人,导航,陀螺仪,传感器ADI公司的ADXRS624是完整的陀螺仪传感器,具有Z轴响应,很宽频率范围有很高的防振性能,能经受2000g的震动,单电源5V和105度C工作,主要用于导航系统,惯性测量,平台稳定性和机器人.本文介绍了ADXRS624主要特性,方框图,评估板EVAL-ADXRS624电路图,元件布局图和元件列表.TheADXRS624isacompleteangularratesensor(gyroscope)thatusestheAnalogDevices,Inc.,surface-micromachiningprocesstocreateafunctionallycompleteandlowcostangularratesensorintegratedwithallrequiredelectronicsononechip.ThemanufacturingtechniqueforthisdeviceisthesamehighvolumeBiMOSprocessusedforhighreliabilityautomotiveairbagaccelerometers.Theoutputsignal,RATEOUT(1B,2A),isavoltageproportionaltoangularrateabouttheaxisnormaltothetopsurfaceofthepackage.Theoutputisratiometricwithrespecttoaprovidedreferencesupply.AsingleexternalresistorbetweenSUMJandRATEOUTcanbeusedtolowerthescalefactor.Anexternalcapacitorsetsthebandwidth.Otherexternalcapacitorsarerequiredforoperation.Atemperatureoutputisprovidedforcompensationtechniques.Twodigitalself-testinputselectromechanicallyexcitethesensortotestproperoperationofboththesensorandthesignalconditioningcircuits.TheADXRS624isavailableina7mm×7mm×3mmBGAchipscalepackage.AO-Electronics傲壹电子官网：中文网：主要特性:CompleterategyroscopeonasinglechipZ-axis(yawrate)responseHighvibrationrejectionoverwidefrequency2000gpoweredshocksurvivabilityRatiometrictoreferencedsupply5Vsingle-supplyoperation105℃operationSelf-testondigitalcommandUltrasmallandlight(0.15cc,0.5gram)TemperaturesensoroutputRoHScompliantQualifiedforautomotiveapplicationsADXRS624应用:NavigationsystemsInertialmeasurementunitsPlatformstabilizationRobotics图1.ADXRS624方框图TheEVAL-ADXRS624isasimpleevaluationboardthatallowsquickevaluationoftheperformanceoftheADXRS624±50°/secyawrategyro.Noadditionalexternalcomponentsarerequiredforoperation.TheEVAL-ADXRS624hasa20-lead,dualin-line(0.3inchwidth×0.1inchpinspacing)interfacethatallowseasyprototypingofproductswithoutBGAsoldering.图2.评估板EVAL-ADXRS624电路图TheschematicoftheEVAL-ADXRS624isshowninFigure2.Thenumbersthatappearinsquarescorrespondtothepinsontheevaluationboard.ItisidenticaltothesuggestedapplicationshownintheADXRS624datasheet.Theanalogandpowergrounds(AGNDandPGND)haveseparatepowerplanesinthisevaluationboardtoaccommodateapplication-specificgroundingschemes.Iftheuserrequiresonlyasinglegroundplane,thesenodescanbeshortedtogether.BothAGNDandPGNDmustbegroundedfortheevaluationboardtooperateproperly.Notethattheanalogsupplyvoltageandchargepumpsupplyvoltage(AVCCandVDD)arenotconnectedontheEVAL-ADXRS624andthattheusercanconnecttheseasappropriatetotheirapplication.ThepartslayoutoftheEVAL-ADXRS624isshowninFigure3,andthepartslistfortheEVAL-ADXRS624isshowninTable1.Asdelivered,theEVAL-ADXRS624issetto10Hzbandwidth(COUT=100nF).Theusercanaddanexternalcapacitortofurtherreducethebandwidthandimprovethenoisefloor.图3.评估板EVAL-ADXRS624元件布局图评估板EVAL-ADXRS624元件列表: