LMP2014MTX/NOPB

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www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 LMP2014MTQuadHighPrecision,Rail-to-RailOutputOperationalAmplifier Check forSamples: LMP2014MT 1FEATURES DESCRIPTION The LMP2014MT isa member ofTexas Instruments' 2• (ForVS = 5V,TypicalUnless OtherwiseNoted) new LMP TM precision amplifierfamily. The• Low SpecifiedVOS Over Temperature 60 µV LMP2014MT offersunprecedented accuracy and

• Low Noise withNo 1/f35nV/√Hz stabilitywhile also being offeredat an affordable price.This device utilizespatentedtechniquesto• High CMRR 130 dB measure and continuallycorrecttheinputoffseterror• High PSRR 120 dB voltage.The resultisan amplifierwhichisultrastable
• High A VOL 130 dB over time and temperature.Ithas excellentCMRR and PSRR ratings,and does not exhibitthe familiar• Wide Gain-Bandwidth Product 3 MHz 1/fvoltageand currentnoiseincreasethatplagues• High Slew Rate 4 V/µs traditionalamplifiers.The combination of the• Low Supply Current3.7mA LMP2014 characteristicsmakes ita good choicefor transduceramplifiers,highgainconfigurations,ADC• Rail-to-RailOutput 30 mV bufferamplifiers,DAC I-Vconversion,and any other• No ExternalCapacitorsRequired 2.7V-5Vapplicationrequiringprecisionand longterm stability.APPLICATIONS Other usefulbenefitsof the LMP2014 are rail-to-rail• PrecisionInstrumentationAmplifiers output,a low supplycurrentof 3.7 mA, and wide
• Thermocouple Amplifiers gain-bandwidthproductof 3 MHz. These extremely versatilefeaturesfoundintheLMP2014 providehigh• StrainGauge BridgeAmplifier performanceand ease ofuse. Connection Diagram Figure1. 14-PinTSSOP – Top View See Package Number PW Pleasebe aware thatan importantnoticeconcerningavailability,standardwarranty,and use incriticalapplicationsof Texas Instrumentssemiconductorproductsand disclaimerstheretoappearsattheend ofthisdatasheet. 2Alltrademarksarethepropertyoftheirrespectiveowners. PRODUCTION DATA informationiscurrentas ofpublicationdate. Copyright© 2004–2013,Texas InstrumentsIncorporatedProductsconform to specificationsper the terms of the Texas Instrumentsstandardwarranty.Productionprocessingdoes not necessarilyincludetestingofallparameters.

SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 www.ti.com These deviceshave limitedbuilt-inESD protection.The leadsshouldbe shortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamage totheMOS gates. AbsoluteMaximum Ratings(1)(2) ESD Tolerance Human Body Model 2000V Machine Model 200V SupplyVoltage 5.8V Common-Mode InputVoltage −0.3≤ VCM ≤ VCC +0.3V Lead Temperature(soldering10 sec.) +300°C DifferentialInputVoltage ±SupplyVoltage CurrentatInputPin 30 mA CurrentatOutputPin 30 mA CurrentatPower SupplyPin 50 mA (1) AbsoluteMaximum Ratingsindicatelimitsbeyond whichdamage may occur.OperatingRatingsindicateconditionsforwhichthedevice isintendedtobe functional,butspecificperformanceisnotensured.Forensuredspecificationsand testconditions,see theElectrical Characteristics. (2) IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheTISalesOffice/Distributorsforavailabilityand specifications. OperatingRatings(1) SupplyVoltage 2.7Vto5.25V StorageTemperatureRange −65°C to150°C OperatingTemperatureRange LMP2014MT, LMP2014MTX 0°C to70°C (1) AbsoluteMaximum Ratingsindicatelimitsbeyond whichdamage may occur.OperatingRatingsindicateconditionsforwhichthedevice isintendedtobe functional,butspecificperformanceisnotensured.Forensuredspecificationsand testconditions,see theElectrical Characteristics. 2.7VDC ElectricalCharacteristics Unlessotherwisespecified,alllimitsspecifiedforT J = 25°C, V+ = 2.7V,V-= 0V,V CM = 1.35V,VO = 1.35Vand R L > 1 M Ω. Boldfacelimitsapplyatthetemperatureextremes. Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units VOS InputOffsetVoltage 0.8 30 μV OffsetCalibrationTime 0.5 10 ms TCV OS InputOffsetVoltage 0.015 μV/°C Long-Term OffsetDrift 0.006 μV/month LifetimeVOS Drift 2.5 μV IIN InputCurrent -3 pA IOS InputOffsetCurrent 6 pA R IND InputDifferentialResistance 9 M Ω CMRR Common Mode RejectionRatio −0.3≤ VCM ≤ 0.9V 95 130 dB 0 ≤ VCM ≤ 0.9V 90 PSRR Power SupplyRejectionRatio 95 120 dB AVOL Open Loop VoltageGain R L = 10 kΩ 95 130 dB R L = 2 kΩ 90 124 (1) Limitsare100% productiontestedat25°C. Limitsovertheoperatingtemperaturerangearespecifiedthroughcorrelationsusing statisticalqualitycontrol(SQC) method. (2) Typicalvaluesrepresentthemost likelyparametricnorm.

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www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 2.7VDC ElectricalCharacteristics(continued) Unlessotherwisespecified,alllimitsspecifiedforT J = 25°C, V+ = 2.7V,V-= 0V,V CM = 1.35V,VO = 1.35Vand R L > 1 M Ω. Boldfacelimitsapplyatthetemperatureextremes. Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units VO OutputSwing R L = 10 kΩ to1.35V 2.63 2.68 VIN(diff)= ±0.5V 2.655 V 0.033 0.070 0.075 R L = 2 kΩ to1.35V 2.615 2.65 VIN(diff)= ±0.5V 2.615 V 0.061 0.085 0.105 IO OutputCurrent Sourcing,VO = 0V 5 12 VIN(diff)= ±0.5V 3 mA Sinking,VO = 5V 5 18 VIN(diff)= ±0.5V 3 IS SupplyCurrentperChannel 0.919 1.20 mA 1.50 2.7VAC ElectricalCharacteristics Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units GBW Gain-BandwidthProduct 3 MHz SR Slew Rate 4 V/μs θ m Phase Margin 60 Deg G m Gain Margin −14 dB en Input-ReferredVoltageNoise 35 nV/√Hz in Input-ReferredCurrentNoise pA/√Hz enp-p Input-ReferredVoltageNoise R S = 100Ω,DC to10 Hz 850 nVpp trec InputOverloadRecoveryTime 50 ms (1) Limitsare100% productiontestedat25°C. Limitsovertheoperatingtemperaturerangearespecifiedthroughcorrelationsusing statisticalqualitycontrol(SQC) method. (2) Typicalvaluesrepresentthemost likelyparametricnorm. 5V DC ElectricalCharacteristics Unlessotherwisespecified,alllimitsspecifiedforT J = 25°C, V+ = 5V,V-= 0V,V CM = 2.5V,VO = 2.5Vand R L > 1M Ω. Boldfacelimitsapplyatthetemperatureextremes. Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units VOS InputOffsetVoltage 0.12 30 μV OffsetCalibrationTime 0.5 10 ms TCV OS InputOffsetVoltage 0.015 μV/°C Long-Term OffsetDrift 0.006 μV/month LifetimeVOS Drift 2.5 μV IIN InputCurrent -3 pA IOS InputOffsetCurrent 6 pA R IND InputDifferentialResistance 9 M Ω CMRR Common Mode RejectionRatio −0.3≤ VCM ≤ 3.2 100 130 dB 0 ≤ VCM ≤ 3.2 90 (1) Limitsare100% productiontestedat25°C. Limitsovertheoperatingtemperaturerangearespecifiedthroughcorrelationsusing statisticalqualitycontrol(SQC) method. (2) Typicalvaluesrepresentthemost likelyparametricnorm. Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LMP2014MT

SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 www.ti.com 5V DC ElectricalCharacteristics(continued) Unlessotherwisespecified,alllimitsspecifiedforT J = 25°C, V+ = 5V,V-= 0V,V CM = 2.5V,VO = 2.5Vand R L > 1M Ω. Boldfacelimitsapplyatthetemperatureextremes. Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units PSRR Power SupplyRejectionRatio 95 120 dB AVOL Open Loop VoltageGain R L = 10 kΩ 105 130 100 dB R L = 2 kΩ 95 132 VO OutputSwing R L = 10 kΩ to2.5V 4.92 4.978 VIN(diff)= ±0.5V 4.95 V 0.040 0.080 0.085 R L = 2 kΩ to2.5V 4.875 4.919 VIN(diff)= ±0.5V 4.875 V 0.091 0.125 0.140 IO OutputCurrent Sourcing,VO = 0V 8 15 VIN(diff)= ±0.5V 6 mA Sinking,VO = 5V 8 17 V IN(diff)= ±0.5V 6 IS SupplyCurrentperChannel 0.930 1.20 mA 1.50 5V AC ElectricalCharacteristics TJ = 25°C, V+ = 5V,V -= 0V,VCM = 2.5V,VO = 2.5V,and R L > 1M Ω.Boldfacelimitsapplyatthetemperatureextremes. Symbol Parameter Conditions Min (1) Typ (2) Max (1) Units GBW Gain-BandwidthProduct 3 MHz SR Slew Rate 4 V/μs θ m Phase Margin 60 deg G m Gain Margin −15 dB en Input-ReferredVoltageNoise 35 nV/√Hz in Input-ReferredCurrentNoise pA/√Hz enp-p Input-ReferredVoltageNoise R S = 100Ω,DC to10 Hz 850 nVPP trec InputOverloadRecoveryTime 50 ms (1) Limitsare100% productiontestedat25°C. Limitsovertheoperatingtemperaturerangearespecifiedthroughcorrelationsusing statisticalqualitycontrol(SQC) method. (2) Typicalvaluesrepresentthemost likelyparametricnorm.

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-500 -400 -300 -200 -100 100 200 300 400 500 BIAS CURRENT (pA) VCM (V) VS = 5V 0.1 100 100k 100 1000 10000 1k10 1M FREQUENCY (Hz) 10k1 VOLTAGE NOISE (nV/ Hz) VS = 5V LMP2014MT www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 TypicalPerformance Characteristics TA=25C, VS= 5V unlessotherwisespecified. Supply Currentvs.Supply Voltage OffsetVoltagevs.Supply Voltage Figure2. Figure3. OffsetVoltagevs.Common Mode OffsetVoltagevs.Common Mode Figure4. Figure5. VoltageNoise vs.Frequency InputBias Currentvs.Common Mode Figure6. Figure7. Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LMP2014MT

FREQUENCY (Hz) 120 PSRR (dB 1M10k100 100 VS = 2.7V VCM = 1V POSITIVE NEGATIVE 10 1k 100k 10M FREQUENCY (Hz) 120 PSRR (dB 1M10k100 100 VS = 5V VCM = 2.5V POSITIVE NEGATIVE LMP2014MT SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 www.ti.com TypicalPerformance Characteristics(continued) TA=25C, VS= 5V unlessotherwisespecified. PSRR vs.Frequency PSRR vs.Frequency Figure8. Figure9. Output Sourcing @ 2.7V Output Sourcing @ 5V Figure10. Figure11. Output Sinking@ 2.7V Output Sinking@ 5V Figure12. Figure13.

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FREQUENCY (Hz) 100 120 140 CMRR (dB) VS = 5V 100 10k 10M FREQUENCY (Hz) -20 100 GAIN (dB) 1M100k1k -30.0 30.0 150.0 120.0 60.0 0.0 90.0 PHASE (° ) R L = 1M C L = < 20pF VS = 2.7V OR 5V VS = 5V VS = 5V VS = 2.7V PHASE GAIN LMP2014MT www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 TypicalPerformance Characteristics(continued) TA=25C, VS= 5V unlessotherwisespecified. Max Output Swing vs.Supply Voltage Max Output Swing vs.Supply Voltage Figure14. Figure15. Min Output Swing vs.Supply Voltage Min Output Swing vs.Supply Voltage Figure16. Figure17. CMRR vs.Frequency Open Loop Gain and Phase vs.Supply Voltage Figure18. Figure19. Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LMP2014MT

FREQUENCY (Hz) -20 100 GAIN (dB) VS = 2.7V VOUT = 200mVPP R L = >1M C L = <20pF PHASE GAIN 0°C 70°C 25°C 70°C 0°C -23 113 PHASE (deg 1k 10k 100k 1M 10M FREQUENCY (Hz) -20 100 GAIN (dB) VS = 5V VOUT = 200mVPP R L = >1M C L = <20pF PHASE GAIN 0°C 70°C 25°C 70°C 0°C -23 113 PHASE (deg 100 10k 10M FREQUENCY (Hz) -20 100 GAIN (dB) 1M100k1k -30.0 30.0 150.0 120.0 60.0 0.0 90.0 PHASE (° ) 20 pF 500 pF 20 pF 500 pF VS = 2.7V, RL = >1M C L = 20,50,200 & 500 pF PHASE GAIN 100 10k 10M FREQUENCY (Hz) -20 100 GAIN (dB) 1M100k1k 20 pF 20 pF 500 pF 500 pF VS = 5V, RL = >1M C L = 20,50,200 & 500 pF -30.0 30.0 150.0 120.0 60.0 0.0 90.0 PHASE (° ) GAIN PHASE 100 10k 10M FREQUENCY (Hz) -20 100 GAIN (dB) 1M100k1k -30.0 30.0 150.0 120.0 60.0 0.0 90.0 PHASE (° ) VS = 2.7V C L = < 20 pF R L = >1M & 2k R L = >1M R L = 2k R L = >1M R L = 2k PHASE GAIN 100 10k 10M FREQUENCY (Hz) -20 100 GAIN (dB) 1M100k1k -30.0 30.0 150.0 120.0 60.0 0.0 90.0 PHASE (° ) VS = 5V C L = < 20 pF R L = >1M & 2k R L = >1M R L = 2k R L = >1M PHASE GAIN LMP2014MT SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 www.ti.com TypicalPerformance Characteristics(continued) TA=25C, VS= 5V unlessotherwisespecified. Open Loop Gain and Phase vs.R L @ 2.7V Open Loop Gain and Phase vs.R L @ 5V Figure20. Figure21. Open Loop Gain and Phase vs.C L @ 2.7V Open Loop Gain and Phase vs.C L @ 5V Figure22. Figure23. Open Loop Gain and Phase vs.Temperature @ 2.7V Open Loop Gain and Phase vs.Temperature @ 5V Figure24. Figure25.

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NOISE (200 nV/DIV) 1 sec/DIV 0.1 1 10 OUTPUT VOLTAGE (V PP ) 0.01 0.1 THD+N (%) MEAS FREQ = 1 KHz MEAS BW = 22 KHz R L = 10k AV = +10 VS = 2.7V VS = 5V 10 100 1k 10k 100k FREQUENCY (Hz) 0.01 0.1 THD+N (%) VS = 2.7V VS = 2.7V VS = 5V VS = 5V VOUT = 2 VPP MEAS BW = 500 kHz R L = 10k AV = +10 LMP2014MT www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 TypicalPerformance Characteristics(continued) TA=25C, VS= 5V unlessotherwisespecified. THD+N vs.AMPL THD+N vs.Frequency Figure26. Figure27. 0.1Hz − 10 Hz Noise vs.Time Figure28. Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LMP2014MT

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APPLICATION INFORMATION

THE BENEFITS OF LMP2014 NO 1/fNOISE Using patentedmethods,the LMP2014 eliminatesthe 1/fnoisepresentinotheramplifiers.That noise,which increasesas frequencydecreases,isa major sourceof measurement errorinallDC-coupled measurements. Low-frequencynoiseappearsas a constantly-changingsignalinserieswithany measurement beingmade. As a result,even when themeasurement ismade rapidly,thisconstantly-changingnoisesignalwillcorrupttheresult. The valueofthisnoisesignalcan be surprisinglylarge.For example:Ifa conventionalamplifierhas a flat-band noiselevelof10nV/√Hz and a noisecornerof10 Hz, theRMS noiseat0.001Hz is1µV/√Hz. Thisisequivalent toa 0.50µV peak-to-peakerror,inthefrequencyrange0.001Hz to1.0Hz. Ina circuitwitha gainof1000,this producesa 0.50mV peak-to-peakoutputerror.Thisnumber of0.001Hz mightappear unreasonablylow,but when a dataacquisitionsystem isoperatingfor17 minutes,ithas been on longenough toincludethiserror.In thissame time,theLMP2014 willonlyhave a 0.21mV outputerror.Thisissmallerby 2.4x.Keep inmind that this1/ferrorgetseven largerat lowerfrequencies.At the extreme,many peopletryto reduce thiserrorby integratingortakingseveralsamples ofthesame signal.Thisisalsodoomed tofailurebecause the1/fnatureof thisnoisemeans thattakinglongersamplesjustmoves themeasurement intolowerfrequencieswhere thenoise leveliseven higher. The LMP2014 eliminatesthissourceof error.The noiselevelisconstantwithfrequencyso thatreducingthe bandwidthreducestheerrorscaused by noise. Anothersourceof errorthatisrarelymentionedisthe errorvoltagecaused by the inadvertentthermocouples createdwhen thecommon "Kovartype"IC package leadmaterialsaresolderedtoa copperprintedcircuitboard. These steel-basedleadframematerialscan produceover35 μV/°C when solderedontoa coppertrace.Thiscan resultinthermocouplenoisethatisequaltotheLMP2014 noisewhen thereisa temperaturedifferenceofonly 0.0014°C between theleadand theboard! For thisreason,thelead-frameoftheLMP2014 ismade ofcopper.Thisresultsinequaland oppositejunctions whichcancelthiseffect. OVERLOAD RECOVERY The LMP2014 recoversfrom inputoverloadmuch fasterthanmost chopper-stabilizedop amps. Recovery from drivingtheamplifierto2X thefullscaleoutput,onlyrequiresabout40 ms. Many chopper-stabilizedamplifierswill takefrom 250 ms toseveralseconds torecoverfrom thissame overload.Thisisbecause largecapacitorsare used tostoretheunadjustedoffsetvoltage. Figure29. The wide bandwidthoftheLMP2014 enhances performancewhen itisused as an amplifiertodriveloadsthat injecttransientsback intotheoutput.ADCs (Analog-to-DigitalConverters)and multiplexersareexamples ofthis typeofload.To simulatethistypeofload,a pulsegeneratorproducinga 1V peak squarewave was connected to the outputthrougha 10 pF capacitor.(Figure29) The typicaltimeforthe outputto recoverto 1% of the appliedpulseis80 ns.To recoverto0.1% requires860ns.Thisrapidrecoveryisdue tothewide bandwidthof theoutputstageand largetotalGBW. NO EXTERNAL CAPACITORS REQUIRED The LMP2014 does notneed externalcapacitors.Thiseliminatestheproblemscaused by capacitorleakageand dielectricabsorption,which can cause delaysof severalseconds from turn-onuntilthe amplifier'serrorhas settled.

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0.1 100 100k 100 1000 10000 1k10 1M FREQUENCY (Hz) 10k1 VOLTAGE NOISE (nV/ Hz) VS = 5V LMP2014MT www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 MORE BENEFITS The LMP2014 offersthebenefitsmentionedabove and more.Ithas a rail-to-railoutputand consumes only950 µA of supplycurrentwhileprovidingexcellentDC and AC electricalperformance.In DC performance,the LMP2014 achieves130 dB ofCMRR, 120 dB ofPSRR and 130 dB ofopen loopgain.InAC performance,the LMP2014 provides3 MHz ofgain-bandwidthproductand 4 V/µs ofslewrate. HOW THE LMP2014 WORKS The LMP2014 uses new, patentedtechniquesto achievethe high DC accuracytraditionallyassociatedwith chopper-stabilizedamplifierswithoutthe major drawbacks produced by chopping.The LMP2014 continuously monitorsthe inputoffsetand correctsthiserror.The conventionalchoppingprocessproduces many mixing products,bothsums and differences,between thechoppingfrequencyand theincomingsignalfrequency.This mixingcauses largeamounts of distortion,particularlywhen the signalfrequencyapproaches the chopping frequency.Even withoutan incomingsignal,thechopperharmonicsmix witheach othertoproduceeven more trash.Ifthissounds unlikelyor difficultto understand,lookat the plot(Figure30),of the outputof a typical (MAX432) chopper-stabilizedop amp. Thisistheoutputwhen thereisno incomingsignal,justtheamplifierina gainof-10withtheinputgrounded.The chopperisoperatingatabout150 Hz; therestismixingproducts.Add an inputsignaland thenoisegetsmuch worse.Compare thisplotwithFigure31 oftheLMP2014. Thisdatawas takenundertheexactsame conditions.The auto-zeroactionisvisibleatabout30 kHz butnotetheabsence of mixingproductsatotherfrequencies.As a result,theLMP2014 has verylow distortionof0.02% and verylow mixingproducts. Figure30. Figure31. Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:LMP2014MT

20: LMP2014MT SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 www.ti.com INPUT CURRENTS The LMP2014's inputcurrentsaredifferentthanstandardbipolarorCMOS inputcurrentsinthatitappearsas a currentflowingin one inputand out the other.Under most operatingconditions,these currentsare in the picoamp leveland willhave littleorno effectinmost circuits.These currentstendtoincreaseslightlywhen the common-mode voltageisnear theminus supply.(See thetypicalcurves.)At hightemperaturessuch as 70°C, the inputcurrentsbecome larger,0.5 nA typical,and are both positiveexceptwhen the VCM isnear V−. If operationisexpectedatlow common-mode voltagesand hightemperature,do notadd resistanceinserieswith the inputsto balancethe impedances.Doing thiscan cause an increaseinoffsetvoltage.A smallresistance such as 1 kΩ can providesome protectionagainstverylargetransientsor overloads,and willnotincreasethe offsetsignificantly. PRECISION STRAIN-GAUGE AMPLIFIER ThisStrain-Gaugeamplifier(Figure32)provideshighgain(1006or~60 dB) withverylow offsetand drift.Using the resistors'tolerancesas shown, the worstcase CMRR willbe greaterthan 108 dB. The CMRR isdirectly relatedto the resistormismatch.The rejectionof common-mode error,at the output,isindependentof the differentialgain,whichissetby R3. The CMRR isfurtherimproved,iftheresistorratiomatchingisimproved,by specifyingtighter-toleranceresistors,orby trimming. Figure32. ExtendingSupply Voltagesand Output Swing by Using a Composite AmplifierConfiguration: Incases where substantiallyhigheroutputswing isrequiredwithhighersupplyvoltages,arrangementslikethe ones shown inFigure33 and Figure34 couldbe used.These configurationsutilizetheexcellentDC performance oftheLMP2014 whileatthesame timeallowthesuperiorvoltageand frequencycapabilitiesoftheLM6171 to setthedynamic performanceoftheoverallamplifier.For example,itispossibletoachieve±12V outputswing with300 MHz ofoverallGBW (AV = 100) whilekeepingtheworstcase outputshiftdue toVOS lessthan4 mV. The LMP2014 outputvoltageiskeptataboutmid-pointofitsoverallsupplyvoltage,and itsinputcommon mode voltagerange allowstheV- terminaltobe grounded inone case (Figure33,invertingoperation)and tiedtoa smallnon-criticalnegativebiasinanother(Figure34,non-invertingoperation).Higherclosed-loopgainsarealso possiblewitha correspondingreductioninrealizablebandwidth.Table 1 shows some otherclosedloopgain possibilitiesalongwiththemeasured performanceineach case.

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0.01 PF 1N4733A (5.1V) R7, 3.9k LMP201X U1 LM6171 R5, 1M (+2.5V) Output +15V 3.9k 20k C3 0.01 PF +15V -15V Input LMP2014MT www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 Figure33. Table1.Composite AmplifierMeasured Performance AV R1 R2 C2 BW SR en p-p Ω Ω pF MHz (V/μs) (mV PP ) 50 200 10k 8 3.3 178 37 100 100 10k 10 2.5 174 70 100 1k 100k 0.67 3.1 170 70 500 200 100k 1.75 1.4 96 250 1000 100 100k 2.2 0.98 64 400 Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:LMP2014MT

+Input -Input (0V to 5V Range) 430: LM9140-2.5 +2.5V +5V ADC1203X +V REF GND -VREF VIN +5V 0.01 PF 1N4731A (4.3V) Input -15V 10k (-0.7V) R7, 3.9k LMP201X U1 LM6171 R5, 1M (+2.5V) Output 0.01 PF +15V 3.9k 20kD2 1N4148 0.01 PF +15V LMP2014MT SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 www.ti.com In terms of the measured outputpeak-to-peaknoise,the followingrelationshipholdsbetween outputnoise voltage,en p-p,fordifferentclosed-loopgain,AV,settings,where −3 dB BandwidthisBW: Figure34. Itshouldbe keptinmind thatinordertominimizetheoutputnoisevoltagefora givenclosed-loopgainsetting, one couldminimizethe overallbandwidth.As can be seen from Equation1 above, the outputnoisehas a square-rootrelationshiptotheBandwidth. In the case of the invertingconfiguration,itisalsopossibleto increasethe inputimpedance of the overall amplifier,by raisingthevalueofR1, withouthavingtoincreasethefeed-backresistor,R2, toimpracticalvalues, by utilizinga "Tee"networkas feedback.See the LMC6442 Data Sheet (ApplicationNotes section)formore detailson this. Figure35.

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www.ti.com SNOSAK6B –DECEMBER 2004–REVISED MARCH 2013 LMP2014 AS ADC INPUT AMPLIFIER The LMP2014 isa greatchoiceforan amplifierstageimmediatelybeforetheinputofan ADC (Analog-to-Digital Converter),whetherAC orDC coupled.See Figure35 and Figure36.Thisisbecause ofthefollowingimportant characteristics: a. Very low offsetvoltageand offsetvoltagedriftover time and temperatureallowa high closed-loopgain settingwithoutintroducingany short-termorlong-termerrors.Forexample,when settoa closed-loopgainof 100 as theanaloginputamplifierfora 12-bitA/D converter,theoverallconversionerroroverfulloperation temperatureand 30 yearslifeofthepart(operatingat50°C) wouldbe lessthan5 LSBs. b. Fast large-signalsettlingtimeto 0.01% of finalvalue(1.4μs) allows12 bitaccuracyat 100 KH Z or more samplingrate. c. No flicker(1/f)noisemeans unsurpasseddata accuracyover any measurement periodof time,no matter how long.Considerthe followingop amp performance,based on a typicallow-noise,high-performance commercially-availabledevice,forcomparison: Op amp flatbandnoise= 8nV/√Hz 1/fcornerfrequency= 100 Hz AV = 2000 Measurement time= 100 sec Bandwidth= 2 Hz Thisexample willresultinabout2.2mV PP (1.9LSB) ofoutputnoisecontributiondue totheop amp alone, compared toabout594 μVPP (lessthan0.5LSB) when thatop amp isreplacedwiththeLMP2014 whichhas no 1/fcontribution.Ifthe measurement time isincreasedfrom 100 seconds to 1 hour,the improvement realizedby usingtheLMP2014 would be a factorofabout4.8times(2.86mV PP compared to596 μV when LMP2014 isused)mainlybecause theLMP2014 accuracyisnotcompromised by increasingtheobservation time. d. Copper leadframeconstructionminimizesany thermocoupleeffectswhichwould degradelow level/highgain dataconversionapplicationaccuracy(seediscussionunder"The BenefitsoftheLMP2014 "sectionabove). e. Rail-to-Railoutputswing maximizestheADC dynamic range in5-Voltsingle-supplyconverterapplications. Below aresome typicalblockdiagramsshowingtheLMP2014 used as an ADC amplifier. Figure36. Copyright© 2004–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:LMP2014MT

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REVISION HISTORY

Changes from RevisionA (March 2013)toRevisionB Page

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www.ti.com 7-Oct-2013 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples LMP2014MT/NOPB ACTIVE TSSOP PW 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 LMP20 14MT LMP2014MTX/NOPB ACTIVE TSSOP PW 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM 0 to 70 LMP20 14MT (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) (mm) (mm) (mm) (mm) W (mm) Pin1 Quadrant PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2015 Pack Materials-Page 1

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMP2014MTX/NOPB TSSOP PW 14 2500 367.0 367.0 35.0 PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2015 Pack Materials-Page 2

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