ADI ADF4355微波宽带(54-6800 MHz)频率合成器解决方案

ADIADF4355微波宽带(54-6800MHz)频率合成器解决方案ADIADF4355微波宽带(54-6800MHz)频率合成器解决方案ADIADF4355微波宽带(54-6800MHz)频率合成器解决方案ADIADF4355微波宽带(54-6800MHz)频率合成器解决方案编制仅供参考审核批准生效日期地址：电话：传真:邮编:ADIADF4355微波宽带(54－6800MHz)频率合成器解决方案ADI公司的ADF4355是微波宽带(54-6800MHz)可实现小数N分频或整数N分频锁相环(PLL)的频率合成器,高分辨率38位模数,低相位噪声电压控制振荡器(VCO),可编程1/2/4/8/16/32/64分频输出,模拟和数字电源为V,主要用在无线基础设施（W-CDMA,TD-SCDMA,WiMAX,GSM,PCS,DCS,DECT）,点到点/点到多点微波链路,卫星/VSAT,测试设备/仪器仪表和时钟产生.本文介绍了ADF4355主要特性,框图和几种应用电路,以及评估板EV-ADF4355SD1Z主要特性,电路图,材料清单和PCB设计图.

TheADF4355allowsimplementationoffractional-Norinteger-Nphase-lockedloop(PLL)frequencysynthesizerswhenusedwithanexternalloopfilterandanexternalreferencefrequency.Aseriesoffrequencydividerspermitsoperationfrom54MHzto6800MHz.

TheADF4355hasanintegratedVCOwithafundamentaloutputfrequencyrangingfrom3400MHzto6800MHz.Inaddition,theVCOfrequencyisconnectedtodivideby1,2,4,8,16,32,or64circuitsthatallowtheusertogenerateRFoutputfrequenciesaslowas54MHz.Forapplicationsthatrequireisolation,theRFoutputstagecanbemuted.Themutefunctionisbothpinandsoftwarecontrollable.

Controlofallon-chipregistersisthroughasimple3-wireinterface.TheADF4355operateswithanaloganddigitalpowersuppliesrangingfromVtoV,withchargepumpandVCOsuppliesfromVtoV.TheADF4355alsocontainshardwareandsoftwarepower-downmodes.

ADF4355主要特性:

RFoutputfrequencyrange:54MHzto6800MHz

Fractional-Nsynthesizerandinteger-Nsynthesizer

Highresolution38-bitmodulus

Lowphasenoise,voltagecontrolledoscillator(VCO)

Programmabledivideby1,2,4,8,16,32,or64output

Analoganddigitalpowersupplies:V

ChargepumpandVCOpowersupplies:Vtypical

Logiccompatibility:V

Programmabledualmodulusprescalerof4/5or8/9

Programmableoutputpowerlevel

RFoutputmutefunction

3-wireserialinterface

Analoganddigitallockdetect

ADF4355应用:

Wirelessinfrastructure(W-CDMA,TD-SCDMA,WiMAX,GSM,PCS,DCS,DECT)

Pointtopoint/pointtomultipointmicrowavelinks

Satellites/VSATs

Testequipment/instrumentation

Clockgeneration

图功能框图

图2.ADF4355直接转换调制器电路图

图3.ADF4355功电源电路图

评估板EV-ADF4355SD1Z

TheEV-ADF4355SD1ZevaluatestheperformanceoftheADF4355frequencysynthesizerwithintegratedVCOforphase-lockedloops(PLLs).AphotographoftheevaluationboardisshowninFigure1.TheevaluationboardcontainstheADF4355frequencysynthesizerwithintegratedVCO,adifferentialMHzreference(TCXO),aloopfilter,aUSBinterface,powersupplyconnectors,andsubminiatureVersionA(SMA)connectors.AUSBcableisincludedtoconnecttheboardtoaPCUSBport.Foreasyprogrammingofthesynthesizer,downloadtheWindows-basedsoftwarefromThisboardrequiresanSDP-S(showninFigure1,butnotsuppliedwiththekit).TheSDP-SallowssoftwareprogrammingoftheEV-ADF4355SD1Zdevice.

评估板EV-ADF4355SD1Z主要特性:

Selfcontainedboard,includingADF4355frequency

synthesizerwithintegratedVCO,differentialMHz

temperaturecontrolledcrystaloscillator(TCXO),loop

filter(20kHz),USBinterface,andvoltageregulators

Windows®-basedsoftwareallowscontrolofsynthesizerfunctionsfromaPC

Externallypoweredby6V

图4.评估板EV-ADF4355SD1Z外形图

图5.评估板EV-ADF4355SD1Z电路图(1)

图6.评估板EV-ADF4355SD1Z电路图(2)

图7.评估板EV-ADF4355SD1Z电路图(3)

评估板EV-ADF4355SD1Z材料清单:

图8.评估板