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1、ADIADXL362微功耗三轴MEMS加速度计解决方案关键字：工业控制,MEMS,加速度计ADI公司的ADXL362是微功耗三轴MEMS加速度计，数字输出,加速度范围为±2/±4/±8g,工作电压1.8V33V,电源电压2V和100Hz输出数据速率时的功耗为2pA,运动触发叫醒模式的功耗为300nA,器件提供12位输出分辨率,8位格式的数据，在±2g范围的分辨率为1mg/LSB,主要用在助听器,家庭保健设备，运动使能屯源开关，无线传感器和运动使能计量设备•本文介绍了ADXL362主要特性,ADXL362功能方框图以及评估板EVAL-A
2、DXL362Z主耍特性和电路图.ADXL362:Micropower3-AxisMEMSAccelerometer:DigitalOutput,±2/±4/±8gRangeTheADXL362isanultra・lowpower3-axisMEMSaccelerometerthatconsumeslessthan2pAata100Hzoutputdatarate,and300nAinmotion-triggeredWake-UpMode.Unlikeaccelerometersthatusepowerdutycyclingtoachi
3、evelowpowerconsumption,theADXL362doesnotaliasinputsignalsbyundersampling;itsamplesthesensor'sfullbandwidthatalldatarates.TheADXL362alwaysprovides12-bitoutputresolution;8-bitformatteddataisalsoprovidedformoreefficientsingle-bytetransferswhenalowerresolutionissufficient.M
4、easurementrangesof±2g,±4g,and±8gareavailable,witharesolutionof1mg/LSBonthe±2grange.ForapplicationswhereanoiselevellowerthantheADXL362'snormal550pg/7Hzisdesired,eitheroftwolowernoisemodes(downto175pg/7Hztyp)maybeselectedatminimalincreaseinsupplycurrent.Inadditiontoitsult
5、ra-lowpowerconsumption,theADXL362hasmanyfeaturestoenabletruesystem-levelpowerreduction.ItincludesadeepmultimodeoutputFIFO,abuilt-inmicropowertemperaturesensor,andseveralactivitydetectionmodesincludingadjustable-thresholdsleepandwakeupoperationthatcanrunaslowas300nAata6H
6、z(approximate)measurementrate.Apinoutputisprovidedtodirectlycontrolanexternalswitchwhenactivityisdetectedifdesired.Inaddition,theADXL362hasprovisionsforexternalcontrolofsamplingtimeand/oranexternalclock.TheADXL362operatesonawide1.6Vto3.6Vsupplyrange,andcaninterface,ifne
7、cessary,toahostoperatingonaseparate,lowersupplyvoltage.TheADXL362isavailableina3mmx3.25mmx1.06mmpackage.ADXL362主要特性:UltralowpowerPowercanbederivedfromcoincellbattery1.8pA@100HzODR,2.0Vsupply3.0pA@400HzODR,2.0Vsupply300nAmotion-activatedWake-upMode10nAStandbyCurrentBuilt
8、-infeaturesforsystem-levelpowersavings:Adjustable-thresholdsleep/wakemodesformotionactivationAutonomousinterru
