TL082Wide Bandwidth Dual JFET Input Operational AmplifierGeneral DescriptionThese devices are low cost, high speed, dual JFET inputoperational amplifiers with an internally trimmed input offsetvoltage (BI-FET II technology). They require low supplycurrent yet maintain a large gain bandwidth product and fastslew rate. In addition, well matched high voltage JFET inputdevices provide very low input bias and offset currents. TheTL082 is pin compatible with the standard LM1558 allowingdesigners to immediately upgrade the overall performance ofexisting LM1558 and most LM358 designs.These amplifiers may be used in applications such as highspeed integrators, fast D/A converters, sample and holdcircuits and many other circuits requiring low input offsetvoltage, low input bias current, high input impedance, highslew rate and wide bandwidth. The devices also exhibit lownoise and offset voltage drift.

Featuresn Internally trimmed offset voltage: 15 mVn Low input bias current: 50 pAn Low input noise voltage: 16nV/Hzn Low input noise current: 0.01 pA/Hzn Wide gain bandwidth: 4 MHzn High slew rate: 13 V/sn Low supply current: 3.6 mAn High input impedance: 1012n Low total harmonic distortion: 0.02%n Low 1/f noise corner: 50 Hzn Fast settling time to 0.01%: 2 s

Typical Connection

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Connection DiagramDIP/SO Package (Top View)

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Order Number TL082CM or TL082CPSee NS Package Number M08A or N08E

Simplified Schematic

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BI-FET II is a trademark of National Semiconductor Corp.

August 2000TL082

Wide

Bandwidth

DualJFETInputOperationalAm

plifier

2004 National Semiconductor Corporation DS008357 www.national.com

Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Supply Voltage 18VPower Dissipation (Note 2)Operating Temperature Range 0C to +70CTj(MAX) 150CDifferential Input Voltage 30V

Input Voltage Range (Note 3) 15VOutput Short Circuit Duration ContinuousStorage Temperature Range 65C to +150CLead Temp. (Soldering, 10 seconds) 260CESD rating to be determined.

Note 1: Absolute Maximum Ratings indicate limits beyond which damageto the device may occur. Operating Ratings indicate conditions for which thedevice is functional, but do not guarantee specific performance limits.

DC Electrical Characteristics (Note 5)Symbol Parameter Conditions TL082C Units

Min Typ MaxVOS Input Offset Voltage RS = 10 k, TA = 25C 5 15 mV

Over Temperature 20 mVVOS/T Average TC of Input Offset RS = 10 k 10 V/C

VoltageIOS Input Offset Current Tj = 25C, (Notes 5, 6) 25 200 pA

Tj 70C 4 nAIB Input Bias Current Tj = 25C, (Notes 5, 6) 50 400 pA

Tj 70C 8 nARIN Input Resistance Tj = 25C 1012 AVOL Large Signal Voltage Gain VS = 15V, TA = 25C 25 100 V/mV

VO = 10V, RL = 2 kOver Temperature 15 V/mV

VO Output Voltage Swing VS = 15V, RL = 10 k 12 13.5 VVCM Input Common-Mode Voltage VS = 15V 11 +15 V

Range 12 VCMRR Common-Mode Rejection Ratio RS 10 k 70 100 dBPSRR Supply Voltage Rejection Ratio (Note 7) 70 100 dBIS Supply Current 3.6 5.6 mA

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AC Electrical Characteristics (Note 5)Symbol Parameter Conditions TL082C Units

Min Typ MaxAmplifier to Amplifier Coupling TA = 25C, f = 1Hz- 120 dB

20 kHz (Input Referred)SR Slew Rate VS = 15V, TA = 25C 8 13 V/sGBW Gain Bandwidth Product VS = 15V, TA = 25C 4 MHzen Equivalent Input Noise Voltage TA = 25C, RS = 100, 25 nV/Hz

f = 1000 Hzin Equivalent Input Noise Current Tj = 25C, f = 1000 Hz 0.01 pA/HzTHD Total Harmonic Distortion AV = +10, RL = 10k,

VO = 20 Vp p,BW = 20 Hz20 kHz

Typical Performance Characteristics (Continued)

Supply CurrentPositive Common-Mode Input

Voltage Limit

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Negative Common-Mode InputVoltage Limit Positive Current Limit

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Negative Current Limit Voltage Swing

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Typical Performance Characteristics (Continued)Output Voltage Swing Gain Bandwidth

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Bode Plot Slew Rate

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Distortion vs FrequencyUndistorted Output

Voltage Swing

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Typical Performance Characteristics (Continued)Open Loop Frequency

ResponseCommon-Mode Rejection

Ratio

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Power Supply RejectionRatio

Equivalent Input NoiseVoltage

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Open Loop VoltageGain (V/V) Output Impedance

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Typical Performance Characteristics (Continued)Inverter Setting Time

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Pulse ResponseSmall Signal Inverting

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Small Signal Non-Inverting

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Large Signal Inverting

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Large Signal Non-Inverting

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Pulse Response (Continued)Current Limit (RL = 100)

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Application HintsThese devices are op amps with an internally trimmed inputoffset voltage and JFET input devices (BI-FET II). TheseJFETs have large reverse breakdown voltages from gate tosource and drain eliminating the need for clamps across theinputs. Therefore, large differential input voltages can easilybe accommodated without a large increase in input current.The maximum differential input voltage is independent of thesupply voltages. However, neither of the input voltagesshould be allowed to exceed the negative supply as this willcause large currents to flow which can result in a destroyedunit.Exceeding the negative common-mode limit on either inputwill cause a reversal of the phase to the output and force theamplifier output to the corresponding high or low state. Ex-ceeding the negative common-mode limit on both inputs willforce the amplifier output to a high state. In neither casedoes a latch occur since raising the input back within thecommon-mode range again puts the input stage and thusthe amplifier in a normal operating mode.Exceeding the positive common-mode limit on a single inputwill not change the phase of the output; however, if bothinputs exceed the limit, the output of the amplifier will beforced to a high state.The amplifiers will operate with a common-mode input volt-age equal to the positive supply; however, the gain band-width and slew rate may be decreased in this condition.When the negative common-mode voltage swings to within3V of the negative supply, an increase in input offset voltagemay occur.Each amplifier is individually biased by a zener referencewhich allows normal circuit operation on 6V power sup-plies. Supply voltages less than these may result in lowergain bandwidth and slew rate.

The amplifiers will drive a 2 k load resistance to 10V overthe full temperature range of 0C to +70C. If the amplifier isforced to drive heavier load currents, however, an increasein input offset voltage may occur on the negative voltageswing and finally reach an active current limit on both posi-tive and negative swings.Precautions should be taken to ensure that the power supplyfor the integrated circuit never becomes reversed in polarityor that the unit is not inadvertently installed backwards in asocket as an unlimited current surge through the resultingforward diode within the IC could cause fusing of the internalconductors and result in a destroyed unit.Because these amplifiers are JFET rather than MOSFETinput op amps they do not require special handling.As with most amplifiers, care should be taken with leaddress, component placement and supply decoupling in orderto ensure stability. For example, resistors from the output toan input should be placed with the body close to the input tominimize pick-up and maximize the frequency of the feed-back pole by minimizing the capacitance from the input toground.A feedback pole is created when the feedback around anyamplifier is resistive. The parallel resistance and capacitancefrom the input of the device (usually the inverting input) to ACground set the frequency of the pole. In many instances thefrequency of this pole is much greater than the expected 3dB frequency of the closed loop gain and consequently thereis negligible effect on stability margin. However, if the feed-back pole is less than approximately 6 times the expected 3dB frequency a lead capacitor should be placed from theoutput to the input of the op amp. The value of the addedcapacitor should be such that the RC time constant of thiscapacitor and the resistance it parallels is greater than orequal to the original feedback pole time constant.

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Detailed Schematic

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Typical ApplicationsThree-Band Active Tone Control

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Typical Applications (Continued)

00835713 All potentiometers are linear taper Use the LF347 Quad for stereo applicationsNote 8: All controls flat.Note 9: Bass and treble boost, mid flat.Note 10: Bass and treble cut, mid flat.Note 11: Mid boost, bass and treble flat.Note 12: Mid cut, bass and treble flat.

Improved CMRR Instrumentation Amplifier

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C and are separate isolated groundsMatching of R2s, R4s and R5s control CMRRWith AVT = 1400, resistor matching = 0.01%: CMRR = 136 dB Very high input impedance Super high CMRR

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Typical Applications (Continued)Fourth Order Low Pass Butterworth Filter

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Fourth Order High Pass Butterworth Filter

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Typical Applications (Continued)Ohms to Volts Converter

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Physical Dimensions inches (millimeters)unless otherwise noted

Order Number TL082CMNS Package M08A

Order Number TL082CPNS Package N08E

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Notes

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reservesthe right at any time without notice to change said circuitry and specifications.For the most current product information visit us at www.national.com.

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which, (a) are intended for surgical implant into the body, or(b) support or sustain life, and whose failure to perform whenproperly used in accordance with instructions for useprovided in the labeling, can be reasonably expected to resultin a significant injury to the user.

2. A critical component is any component of a life supportdevice or system whose failure to perform can be reasonablyexpected to cause the failure of the life support device orsystem, or to affect its safety or effectiveness.

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This datasheet has been download from:

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Datasheets for electronics components.

TL082General DescriptionFeaturesTypical ConnectionConnection DiagramSimplified SchematicAbsolute Maximum RatingsDC Electrical Characteristics AC Electrical Characteristics Typical Performance CharacteristicsPulse ResponseApplication HintsDetailed SchematicTypical ApplicationsPhysical Dimensions