Texas Instruments LMV225 Bruksanvisning

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PA

ANTENNA

RF

IN

/E

N

OUT

LMV226/

LMV228

RF

ENABLE

R

2

10 k:

V

DD

GND

50:

C

100 pF

PA

ANTENNA

OUT

RF

V

DD

GND

RF

IN

/E

N

LMV225

R

1

1.8 k:

R

2

10 k:

ENABLE

C

100 pF

LMV225,LMV226,LMV228

www.ti.com

SNWS013L–AUGUST2003–REVISEDMARCH2013

LMV225/LMV226/LMV228RFPowerDetectorforCDMAandWCDMA

CheckforSamples:LMV225,LMV226,LMV228

1

FEATURES

DESCRIPTION

TheLMV225/LMV226/LMV228are30dBRFpower

2

•30dBLinearindBPowerDetectionRange

detectorsintendedforuseinCDMAandWCDMA

•OutputVoltageRange0.2to2V

applications.ThedevicehasanRFfrequencyrange

•LogicLowShutdown

from450MHzto2GHz.Itprovidesanaccurate

temperatureandsupplycompensatedoutputvoltage

•Multi-BandOperationfrom450MHzto2000

thatrelateslinearlytotheRFinputpowerindBm.

MHz

Thecircuitoperateswithasinglesupplyfrom2.7Vto

•AccurateTemperatureCompensation

5.5V.TheLMV225/LMV226/LMV228havean

•Packages:

integratedfilterforlow-rippleaveragepowerdetection

ofCDMAsignalswith30dBdynamicrange.

–DSBGAThin1.0mmx1.0mmx0.6mm

Additionalfilteringcanbeappliedusingasingle

–DSBGAUltraThin1.0mmx1.0mmx0.35

externalcapacitor.

mm

TheLMV225hasanRFpowerdetectionrangefrom

–WSON2.2mmx2.5mmx0.8mm

–30dBmto0dBmandisideallysuitedfordirectuse

–(LMV225andLMV228)

incombinationwithresistivetaps.The

LMV226/LMV228haveadetectionrangefrom–15

APPLICATIONS

dBmto15dBmandareintendedforusein

combinationwithadirectionalcoupler.TheLMV226

•CDMARFPowerControl

isequippedwithabufferedoutputwhichmakesit

•WCDMARFPowerControl

suitableforGSM,EDGE,GPRSandTDMA

•CDMA2000RFPowerControl

applications.

•PAModules

ThedeviceisactiveforEnable=HI,otherwiseitisin

alowpowerconsumptionshutdownmode.During

shutdowntheoutputwillbeLOW.Theoutputvoltage

rangesfrom0.2Vto2Vandcanbescaleddownto

meetADCinputrangerequirements.

TheLMV225/LMV226/LMV228powerdetectorsare

offeredinthethin1.0mmx1.0mmx0.6mm

DSBGApackageandtheultrathin1.0mmx1.0mm

x0.35mmDSBGApackage.TheLMV225andthe

LMV228arealsoofferedinthe2.2mmx2.5mmx

0.8mmWSONpackage.

TypicalApplication

Figure1.LMV225Figure2.LMV226/LMV228

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer