LP339 LP339 Ultra-Low Power Quad Comparator Literature Number: SNOSBE0A

L August2000 P 3 3 9 U LP339 lt r a Ultra-Low Power Quad Comparator - L o General Description n Singlesupplyoperation w n Sensingatground P The LP339 consists of four independent voltage compara- n CompatiblewithCMOSlogicfamily o tors designed specifically to operate from a single power n Pin-outidenticaltoLM339 w supply and draw typically 60 µAof power supply drain cur- e rentoverawiderangeofpowersupplyvoltages.Operation Features r from split supplies is also possible and the ultra-low power Q supplydraincurrentisindependentofthepowersupplyvolt- n Ultra-lowpowersupplycurrentdrain age. These comparators also feature a common-mode (60µA)—independentofthesupplyvoltage u a range which includes ground, even when operated from a (75µW/comparatorat+5VDC) d singlesupply. n Lowinputbiasingcurrent: 3nA C Applications include limit comparators, simple n Lowinputoffsetcurrent: ±0.5nA o analog-to-digital converters, pulse, square and time delay n Lowinputoffsetvoltage: ±2mV m generators; VCO’s; multivibrators; high voltage logic gates. n Inputcommon-modevoltageincludesground The LP339 was specifically designed to interface with the p CMOS logic family.The ultra-low supply current makes the n OutputvoltagecompatiblewithMOSandCMOSlogic a n Highoutputsinkcurrentcapability(30mAatV =2V ) r LP339valuableinbatterypoweredapplications. O DC a n SupplyInputprotectedagainstreversevoltages t o Advantages r n Ultra-lowpowersupplydrainsuitableforbattery applications Schematic and Connection Diagrams DS005226-2 OrderNumberLP339MforS.O.Package DS005226-1 SeeNSPackageNumberM14A OrderNumberLP339NforDual-In-LinePackage SeeNSPackageNumberN14A Typical Applications (V+= 5.0 V ) DC BasicComparator DrivingCMOS DS005226-3 DS005226-4 ©2000NationalSemiconductorCorporation DS005226 www.national.com

9 3 3 Absolute Maximum Ratings (Note 1) OperatingTemperatureRange 0˚Cto+70˚C P L If Military/Aerospace specified devices are required, StorageTemperatureRange −65˚to+150˚C pleasecontacttheNationalSemiconductorSalesOffice/ SolderingInformation: Distributorsforavailabilityandspecifications. Dual-In-LinePackage(10sec.) +260˚C SupplyVoltage 36V or ±18V S.O.Package: DC DC DifferentialInputVoltage ±36V VaporPhase(60sec.) +215˚C DC InputVoltage −0.3V to36V Infrared(15sec.) +220˚C DC DC PowerDissipation(Note2) SeeAN-450“SurfaceMountingMethodsandTheirEffecton Product Reliability” for other methods of soldering surface MoldedDIP 570mW mountdevices. OutputShortCircuittoGND(Note3) Continuous InputCurrentV <−0.3V (Note4) 50mA IN DC Electrical Characteristics (V+=5V )(Note5) DC Parameter Conditions Min Typ Max Units InputOffsetVoltage T =25˚C(Note10) ±2 ±5 mV A DC InputBiasCurrent I (+)orI (−)withthe 2.5 25 nA IN IN DC OutputintheLinearRange,T =25˚C(Note6) A InputOffsetCurrent I (+)−I (−),T =25˚C ±0.5 ±5 nA IN IN A DC InputCommon T =25˚C(Note7) 0 V+−1.5 V A DC ModeVoltageRange SupplyCurrent R =InfiniteonallComparators,T =25˚C 60 100 µA L A DC VoltageGain V = 1V to11V , 500 V/mV O DC DC R =15kW ,V+=15V ,T =25˚C L DC A LargeSignal V =TTLLogicSwing,V =1.4V , 1.3 µSec IN REF DC ResponseTime V =5V ,R =5.1kW ,T =25˚C RL DC L A ResponseTime V =5V ,R =5.1kW ,T =25˚C(Note8) 8 µSec RL DC L A OutputSinkCurrent V (−)=1V ,V (+)=0,V =2V , 15 30 mA IN DC IN O DC DC T =25˚C(Note12) A V =0.4V 0.20 0.70 mA O DC DC OutputLeakageCurrent V (+)=1V ,V (−)=0,V =5V ,T =25˚C 0.1 nA IN DC IN O DC A DC InputOffsetVoltage (Note10) ±9 mV DC InputOffsetCurrent I (+)−I (−) ±1 ±15 nA IN IN DC InputBiasCurrent I (+)orI (−)withOutputinLinearRange 4 40 nA IN IN DC InputCommon SingleSupply 0 V+−2.0 V DC ModeVoltageRange OutputSinkCurrent V (−)=1V ,V (+)=0,V =2V 10 mA IN DC IN O DC DC OutputLeakageCurrent V (+)=1V ,V (−)=0,V =30V 1.0 µA IN DC IN O DC DC DifferentialInputVoltage AllV ‡ 0V (orV−onsplitsupplies)(Note9) 36 V IN’s DC DC Note1: AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsforwhichthedeviceisfunc- tional,butdonotguaranteespecificperformancelimits. Note2: Forelevatedtemperatureoperation,Tjmaxis125˚CfortheLP339.q ja(junctiontoambient)is175˚C/WfortheLP339Nand120˚C/WfortheLP339Mwhen eitherdeviceissolderedinaprintedcircuitboardinastillairenvironment.Thelowbiasdissipationandthe“ON-OFF”characteristicoftheoutputskeepsthechip dissipationverysmall(PD£ 100mW),providedtheoutputtransistorsareallowedtosaturate. Note3: ShortcircuitsfromtheoutputtoV+cancauseexcessiveheatingandeventualdestruction.Themaximumoutputcurrentisapproximately50mA. Note4: Thisinputcurrentwillonlyexistwhenthevoltageatanyoftheinputleadsisdrivennegative.Itisduetothecollector-basejunctionoftheinputPNPtran- sistorsbecomingforwardbiasedandtherebyactingasinputclampdiodes.Inadditiontothisdiodeaction,thereisalsolateralNPNparasitictransistoractiononthe ICchip.ThistransistoractioncancausetheoutputvoltageofthecomparatorstogototheV+voltagelevel(ortogroundforalargeinputoverdrive)forthetimedu- rationthataninputisdrivennegative.Thisisnotdestructiveandnormaloutputstateswillre-establishwhentheinputvoltage,whichisnegative,againreturnstoa valuegreaterthan−0.3VDC(TA=25˚C). Note5: ThesespecificationsapplyforV+=5VDCand0˚C£ TA£ 70˚C,unlessotherwisestated.Thetemperatureextremesareguaranteedbutnot100%production tested.TheseparametersarenotusedtocalculateoutgoingAQL. Note6: ThedirectionoftheinputcurrentisoutoftheICduetothePNPinputstage.Thiscurrentisessentiallyconstant,independentofthestateoftheoutput,so noloadingchangeexistsonthereferenceortheinputlinesaslongasthecommon-moderangeisnotexceeded. Note7: Theinputcommon-modevoltageoreitherinputvoltageshouldnotbeallowedtogonegativebymorethan0.3V.Theupperendofthecommon-modevolt- agerangeisV+−1.5V(TA=25˚C),buteitherorbothinputscangoto30VDCwithoutdamage. Note8: Theresponsetimespecifiedisfora100mVinputstepwith5mVoverdrive.Forlargeroverdrivesignals1.3µscanbeobtained.SeeTypicalPerformance Characteristicssection. www.national.com 2

L Electrical Characteristics P (Continued) 3 3 9 Note9: Positiveexcursionsofinputvoltagemayexceedthepowersupplylevel.Aslongastheothervoltageremainswithinthecommon-moderange,thecompara- torwillprovideaproperoutputstate.Thelowinputvoltagestatemustnotbelessthan−0.3VDC(or0.3VDCbelowthemagnitudeofthenegativepowersupply,if used)atTA=25˚C. Note10: Atoutputswitchpoint,VO=1.4V,RS=0W withV+from5VDC;andoverthefullinputcommon-moderange(0VDCtoV+−1.5VDC). Note11: ForinputsignalsthatexceedV+,onlytheoverdrivencomparatorisaffected.Witha5Vsupply,VINshouldbelimitedto25Vmaximum,andalimitingresistor shouldbeusedonallinputsthatmightexceedthepositivesupply. Note12: Theoutputsinkcurrentisafunctionoftheoutputvoltage.TheLP339hasabi-modaloutputsectionwhichallowsittosinklargecurrentsviaaDarlington connectionatoutputvoltagesgreaterthanapproximately1.5VDCandsinklowercurrentsbelowthispoint.(Seetypicalcharacteristicssectionandapplicationssec- tion). Typical Performance Characteristics SupplyCurrent InputCurrent OutputSinkCurrent DS005226-35 DS005226-36 DS005226-37 OutputSinkCurrent ResponseTimesfor ResponseTimesfor VariousInput VariousInput Overdrives — Overdrives — NegativeTransition PositiveTransition DS005226-38 DS005226-39 DS005226-40 3 www.national.com

9 3 3 Application Hints Notice that the output section is configured in a Darlington P connection(ignoringQ3).Therefore,iftheoutputvoltageis L All pins of any unused comparators should be tied to the held high enough (V ‡ 1 V ), Q1 is not saturated and the O DC negativesupply. output current is limited only by the product of the betas of The bias network of the LP339 establishes a drain current Q1,Q2andI1(andthe60W R ofQ2).TheLP339isthus SAT whichisindependentofthemagnitudeofthepowersupply capable of driving LED’s, relays, etc. in this mode while voltageovertherangeoffrom2V to30V . maintaining an ultra-low power supply current of typically DC DC It is usually unnecessary to use a bypass capacitor across 60µA. thepowersupplyline. IftransistorQ3wereomitted,andtheoutputvoltageallowed ThedifferentialinputvoltagemaybelargerthanV+without to drop below about 0.8 VDC, transistor Q1 would saturate damagingthedevice.Protectionshouldbeprovidedtopre- andtheoutputcurrentwoulddroptozero.Thecircuitwould, venttheinputvoltagesfromgoingnegativemorethan−0.3 therefore, be unable to “pull” low current loads down to V (at25˚C).Aninputclampdiodecanbeusedasshown ground (or the negative supply, if used).Transistor Q3 has DC intheapplicationsection. been included to bypass transistor Q1 under these condi- tionsandapplythecurrentI1directlytothebaseofQ2.The The output section of the LP339 has two distinct modes of outputsinkcurrentisnowapproximatelyI1timesthebetaof operation-aDarlingtonmodeandagroundedemittermode. Q2(700µAatV =0.4V ).TheoutputoftheLP339exhib- ThisuniquedrivecircuitpermitstheLP339tosink30mAat O DC its a bi-modal characteristic with a smooth transition be- V =2 V (Darlington mode) and 700 µA at V =0.4 V O DC O DC tween modes. (See Output Sink Current graphs in Typical (groundedemittermode).Figure1isasimplifiedschematic PerformanceCharacteristicssection.) diagramoftheLP339outputsection. Itisalsoimportanttonotethatinbothcasestheoutputisan uncommitted collector. Therefore, many collectors can be tiedtogethertoprovideanoutputOR’ingfunction.Anoutput pull-up resistor can be connected to any available power supply voltage within the permitted power supply voltage range and there is no restriction on this voltage due to the magnitudeofthevoltagewhichisappliedtotheV+terminal oftheLP339package. DS005226-11 FIGURE1. www.national.com 4

L P Typical Applications (V+=15 V ) 3 DC 3 9 One-ShotMultivibrator DS005226-13 Time-DelayGenerator DS005226-15 5 www.national.com

9 3 3 Typical Applications (V+=15 V ) (Continued) P DC L ORingtheOutputs DS005226-16 SquarewaveOscillator DS005226-17 www.national.com 6

L Typical Applications (V+=15 V ) (Continued) P3 DC 3 9 ThreeLevelAudioPeakIndicator DS005226-19 LEDDriver DS005226-22 PulseGenerator DS005226-18 7 www.national.com

9 3 3 Typical Applications (V+=15 V ) (Continued) P DC L Bi-StableMultivibrator DS005226-21 RelayDriver DS005226-23 BuzzerDriver ComparatorWith60mASinkCapability DS005226-24 DS005226-25 www.national.com 8

L Typical Applications (V+=15 V ) (Continued) P3 DC 3 9 Non-InvertingComparatorwithHysteresis InvertingComparatorwithHysteresis DS005226-26 DS005226-27 ComparingInputVoltages BasicComparator OutputStrobing ofOppositePolarity DS005226-29 DS005226-30 DS005226-28 TransducerAmplifier ZeroCrossingDetector(SinglePowerSupply) DS005226-32 DS005226-31 9 www.national.com

9 3 3 Typical Applications (V+=15 V ) (Continued) P DC L Split-SupplyApplications ComparatorWithaNegativeReference ZeroCrossingDetector DS005226-34 DS005226-33 www.national.com 10

L P Physical Dimensions inches (millimeters) unless otherwise noted 3 3 9 S.O.Package(M) OrderNumberLP339MorLP339MX NSPackageM14A MoldedDual-In-LinePackage(N) OrderNumberLP339N NSPackageNumberN14A 11 www.national.com

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