ADI ADF4150HV 4.4 GHz频率合成方案

ADIADF4150HV4.4GHz频率合成方案ADI公司的ADF4150HV是集成了高压(6V到30V)电荷泵的4.4GHz分数N或整数N的频率合成器,RF带宽到4.4GHz,输出分频可以是1/2/3/6/8或16,合成器电源3.0V到3.6V,可编程输出功率电平,主要用在无线基础设备,微波点对点/点对多点无线电,VSAT无线电,测试设备,军用和雷达等.本文介绍ADF4150HV主要特性,功能方框图,超宽带PLL电路图和微波PLL电路图以及ADuC70XX,ADSP-21xx和ADF4150HV连接框图.

TheADF4150HVisa4.4GHzfractional-Norinteger-Nfrequencysynthesizerwithanintegratedhighvoltagechargepump.ThesynthesizercanbeusedtodriveexternalwidebandVCOsdirectly,removingtheneedforoperationalamplifierstoachievehighertuningvoltages.Thissimplifiesdesignandreducescostwhileimprovingphasenoise,asactivefiltertopologiestendtodegradephasenoisewhencomparedtopassivefilters.

TheVCOfrequencycanbedivided-by1/2/4/8or16toallowtheusertogenerateRFoutputfrequenciesaslowas31.25MHz.ForapplicationsthatrequireisolationtheRFoutputstagecanbemuted.Themutefunctionisbothpinandsoftwarecontrollable.

Controlofalltheon-chipregistersisthroughasimple3-wireinterface.Thechargepumpoperatesoffasupplyrangingfrom6Vto30V,whiletherestofthedeviceoperatesfrom3.0Vto3.6V.TheADF4150HVcanbepowereddownwhennotinuse.

ADF4150HV主要特性:

Fractional-Nsynthesizerandinteger-Nsynthesizer

Highvoltagechargepump:6Vto30V

RFbandwidthto4.4GHz

Programmabledivide-by-1/2/4/8or16outputs

3.0Vto3.6Vsynthesizerpowersupply

Programmabledual-modulusprescalerof4/5or8/9

Programmableoutputpowerlevel

Programmablechargepumpcurrents

RFoutputmutefunction

3-wireserialinterface

Analoganddigitallockdetect

ADF4150HV应用:

Wirelessinfrastructure

MicrowavePointtoPoint/Multi-PointRadios

VSATRadios

Testequipment

Military&Radarapplications

Private/LandMobileRadio

图1.ADF4150HV功能方框图

图2.采用ADF4150HV和VCO的超宽带PLL电路图

图3.采用ADF4150HV的16GHz微波PLL电路图

图4.ADuC70XX和ADF4150HV连接框图

图5.ADSP-21xx和ADF4150HV连接框图

详情请见:

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