Texas Instruments LMV221 Handleiding

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PA

ANTENNA

RFIN

OUT

LMV221

RF

VDD

GND

50 :

REF

ADC

2

C

P

R

P

1

6

3

45

-

+

COUPLER

EN

Copyright © 2016, Texas Instruments Incorporated

PA

ANTENNA

RFIN

OUT

LMV221

RF

VDD

GND

50 :

EN

REF

ADC

2

C

S

R

S

1

6

3

45

-

+

COUPLER

Copyright © 2016, Texas Instruments Incorporated

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LMV221

SNWS018D–DECEMBER2006–REVISEDJUNE2016

LMV22150-MHzto3.5-GHz40-dBLogarithmicPowerDetectorforCDMAandWCDMA

1

1Features

1

•2.7-Vto3.3-VSupplyVoltage

•40-dBLinearindBPowerDetectionRange

•0.3-Vto2-VOutputVoltageRange

•Shutdown

•Multi-BandOperationfrom50MHzto3.5GHz

•0.5-dBAccurateTemperatureCompensation

•ExternalConfigurableOutputFilterBandwidth

•2.5mm×2.2mm×0.8mm6-pinWSON

Package

2Applications

•UMTS/CDMA/WCDMARFPowerControl

•GSM/GPRSRFPowerControl

•PAModules

•IEEE802.11b,g(WLAN)

3Description

TheLMV221isa40-dBRFpowerdetectorintended

foruseinCDMAandWCDMAapplications.The

devicehasanRFfrequencyrangefrom50MHzto

3.5GHz.Itprovidesanaccuratetemperatureand

supply-compensatedoutputvoltagethatrelates

linearlytotheRFinputpowerindBm.Thecircuit

operateswithasinglesupplyfrom2.7Vto3.3V.

TheLMV221hasanRFpowerdetectionrangefrom

−45dBmto−5dBmandisideallysuitedfordirect

useincombinationwitha30-dBdirectionalcoupler.

Additionallow-passfilteringoftheoutputsignalcan

beachievedbymeansofanexternalresistorand

capacitor.showsadetectorwithanadditionaloutput

lowpassfilter.ThefilterfrequencyissetwithR

S

and

C

S

.

showsadetectorwithanadditionalfeedbacklow

passfilter.ResistorR

P

isoptionalandlowersthe

trans-impedancegain(R

TRANS

).Thefilterfrequencyis

setwithC

P

//C

TRANS

andR

P

//R

TRANS

.

ThedeviceisactiveforEnable=High,otherwiseitis

inalowpowerconsumptionshutdownmode.Tosave

powerandpreventdischargeofanexternalfilter

capacitance,theoutput(OUT)ishigh-impedance

duringshutdown.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LMV221WSON(6)2.50mm×2.20mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

space

space

space

TypicalApplication:OutputRCLowPassFilterTypicalApplication:Feedback(R)CLowPassFilter

Product specificaties