Austriamicrosystems AS3930单路低功耗ASK接收方案

AustriamicrosystemsAS3930单路低功耗ASK接收方案Austriamicrosystems公司的AS3930是单路低功耗ASK接收器,能产生LF载波频率在110-150kHz间的叫醒信号.集成的相关器能用来检测可编程的16位叫醒图,叫醒支持1秒到2小时,叫醒灵敏度100μVRMS,工作电压2.4-3.6V,主要用在RF标签,实时定位系统,工作人员识别,接入控制和无线传感器.本文介绍AS3930主要特性,方框图,有晶振,无晶振和外接时钟源的AS3930应用电路.

ActiveRFIDtags,real-timelocationsystems,operatoridentification,accesscontrol,andwirelesssensors

AS3930SingleChannelLowFrequencyWakeupReceiver

TheAS3930isasingle-channellowpowerASKreceiverthatisabletogenerateawakeupupondetectionofadatasignalwhichusesaLFcarrierfrequencybetween110-150kHz.Theintegratedcorrelatorcanbeusedfordetectionofaprogrammable16-bitwakeuppattern.

TheAS3930providesadigitalRSSIvalue,itsupportsaprogrammabledatarateandManchesterdecodingwithclockrecovery.TheAS3930offersareal-timeclock(RTC),whichiseitherderivedfromacrystaloscillatorortheinternalRCoscillator.

TheprogrammablefeaturesofAS3930enabletooptimizeitssettingsforachievingalongerdistancewhileretainingareliablewakeupgeneration.ThesensitivitylevelofAS3930canbeadjustedinpresenceofastrongfieldorinnoisyenvironments.

Thedeviceisavailablein16pinTSSOPandQFN4x416LDpackages.

AS3930主要特性:

SinglechannelASKwakeupreceiver

Carrierfrequencyrange110-150kHz

Programmablewakeuppattern(16bits)

Doublingofwakeuppatternsupported

Wakeupwithoutpatterndetectionsupported

Wakeupsensitivity100μVRMS(typ.)

Adjustablesensitivitylevel

Highlyresistanttofalsewakeups

Falsewakeupcounter

Periodicalforced

wakeupsupported(1s–2h)

Lowpowerlisteningmodes

Currentconsumptioninlisteningmode1.37μA(typ.)

Datarateadjustablefrom0.5-4kbps(Manchester)

Manchesterdecodingwithclockrecovery

DigitalRSSI

Dynamicrange64dB5bit

RSSIstep(2dBperstep)

RTCbasedon32kHzXTAL,RC-OSC,orexternalclock

Operatingtemperaturerange-40to+85℃

Operatingsupplyvoltage2.4-3.6V(TA=25℃)

Bidirectionalserialdigitalinterface(SDI)

Packageoption16pinTSSOP,QFN4x416LD

AS3930应用:

TheAS3930isidealforActiveRFIDtags,real-timelocationsystems,operatoridentification,accesscontrol,andwirelesssensors.

图1.AS3930方框图

图2.有晶振的AS3930应用电路

图3.无晶振的AS3930应用电路

图4.外接时钟源的AS3930应用电路