Texas Instruments LF198JAN Handleiding

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LF198JAN

www.ti.com

SNOSAJ2A–FEBRUARY2005–REVISEDMARCH2013

LF198JANMonolithicSample-and-HoldCircuits

CheckforSamples:LF198JAN

1

FEATURES

DESCRIPTION

TheLF198isamonolithicsample-and-holdcircuit

2

•Operatesfrom±5Vto±18VSupplies

whichutilizesBI-FETtechnologytoobtainultra-high

•LessThan10μsAcquisitionTime

dcaccuracywithfastacquisitionofsignalandlow

•TTL,PMOS,CMOSCompatibleLogicInput

drooprate.Operatingasaunitygainfollower,dcgain

accuracyis0.002%typicalandacquisitiontimeisas

•0.5mVTypicalHoldStepatC

h

=0.01μF

lowas6μsto0.01%.Abipolarinputstageisusedto

•LowInputOffset

achievelowoffsetvoltageandwidebandwidth.Input

•0.002%GainAccuracy

offsetadjustisaccomplishedwithasinglepin,and

doesnotdegradeinputoffsetdrift.Thewide

•LowOutputNoiseinHoldMode

bandwidthallowstheLF198tobeincludedinsidethe

•InputCharacteristicsDoNotChangeDuring

feedbackloopof1MHzopampswithouthaving

HoldMode

stabilityproblems.Inputimpedanceof10

10

Ωallows

•HighSupplyRejectionRatioinSampleorHold

highsourceimpedancestobeusedwithout

degradingaccuracy.

•WideBandwidth

•SpaceQualified

P-channeljunctionFET'sarecombinedwithbipolar

LogicInputsontheLF198areFullyDifferential

devicesintheoutputamplifiertogivedroopratesas

lowas5mV/minwitha1μFholdcapacitor.The

withLowInputCurrent,AllowingDirect

JFET'shavemuchlowernoisethanMOSdevices

ConnectiontoTTL,PMOS,andCMOS.

usedinpreviousdesignsanddonotexhibithigh

DifferentialThresholdis1.4V.TheLF198will

temperatureinstabilities.Theoveralldesignensures

Operatefrom±5Vto±18VSupplies.

nofeed-throughfrominputtooutputinthehold

mode,evenforinputsignalsequaltothesupply

voltages.

ConnectionDiagrams

Figure1.TO-99Package

SeePackageNumberLMC

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2005–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties