Datasheet LM118, LM218, LM318 Datasheet (National Semiconductor)

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LM118/LM218/LM318
Operational Amplifiers

General Description

The LM118 series are precision high speed operational am­plifiers designed for applications requiring wide bandwidth
and high slew rate. They feature a factor of ten increase in
speed over general purpose devices without sacrificing DC
performance.

The LM118 series has internal unity gain frequency compen­sation. This considerably simplifies its application since no
external components are necessary for operation. However,
unlike most internally compensated amplifiers, external fre­quency compensation may be added for optimum perfor­mance. For inverting applications, feedforward compensa­tion will boost the slew rate to over 150V/µs and almost
double the bandwidth. Overcompensation can be used with
the amplifier for greater stability when maximum bandwidth
is not needed. Further, a single capacitor can be added to
reduce the 0.1% settling time to under 1 µs.

The high speed and fast settling time of these op amps make
them useful in A/D converters, oscillators, active filters,

August 2000

sample and hold circuits, or general purpose amplifiers.
These devices are easy to apply and offer an order of
magnitude better AC performance than industry standards
such as the LM709.

The LM218 is identical to the LM118 except that the LM218
has its performance specified over a −25˚C to +85˚C tem­perature range. The LM318 is specified from 0˚C to +70˚C.

Features

n 15 MHz small signal bandwidth
n Guaranteed 50V/µs slew rate
n Maximum bias current of 250 nA
n Operates from supplies of
n Internal frequency compensation
n Input and output overload protected
n Pin compatible with general purpose op amps

±

5V to±20V

LM118/LM218/LM318 Operational Amplifiers

Fast Voltage Follower

(Note 1)

Note 1: Do not hard-wire as voltage follower (R1 ≥ 5kΩ)

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© 2004 National Semiconductor Corporation DS007766 www.national.com

Absolute Maximum Ratings (Note 7)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage

Power Dissipation (Note 2) 500 mW

Differential Input Current (Note 3)

LM118/LM218/LM318

Input Voltage (Note 4)

Output Short-Circuit Duration Continuous

Operating Temperature Range

LM118 −55˚C to +125˚C

LM218 −25˚C to +85˚C

LM318 0˚C to +70˚C

±

±

10 mA

±

20V

15V

Lead Temperature (Soldering, 10 sec.)

Hermetic Package 300˚C

Plastic Package 260˚C

Soldering Information

Dual-In-Line Package

Soldering (10 sec.) 260˚C

Small Outline Package

Vapor Phase (60 sec.) 215˚C

Infrared (15 sec.) 220˚C

See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.

ESD Tolerance (Note 8) 2000V

Storage Temperature Range −65˚C to +150˚C

Electrical Characteristics (Note 5)

Parameter Conditions LM118/LM218 LM318 Units

Min Typ Max Min Typ Max

Input Offset Voltage T

Input Offset Current T

Input Bias Current T

Input Resistance T

Supply Current T

Large Signal Voltage Gain T

Slew Rate T

Small Signal Bandwidth T

Input Offset Voltage 615mV

Input Offset Current 100 300 nA

Input Bias Current 500 750 nA

Supply Current T

Large Signal Voltage Gain V

Output Voltage Swing V

Input Voltage Range V

Common-Mode Rejection Ratio 80 100 70 100 dB

Supply Voltage Rejection Ratio 70 80 65 80 dB

Note 2: The maximum junction temperature of the LM118 is 150˚C, the LM218 is 110˚C, and the LM318 is 110˚C. For operating at elevated temperatures, devices
in the H08 package must be derated based on a thermal resistance of 160˚C/W, junction to ambient, or 20˚C/W, junction to case. The thermal resistance of the
dual-in-line package is 100˚C/W, junction to ambient.

Note 3: The inputs are shunted with back-to-back diodes for overvoltage protection. Therefore, excessive current will flow if a differential input voltage in excess of
1V is applied between the inputs unless some limiting resistance is used.

Note 4: For supply voltages less than

Note 5: These specifications apply for

power supplies must be bypassed with 0.1 µF disc capacitors.

Note 6: Slew rate is tested with V
rates between −5.0V and +5.0V and vice versa are tested and guaranteed to exceed 50V/µs.

Note 7: Refer to RETS118X for LM118H and LM118J military specifications.

Note 8: Human body model, 1.5 kΩ in series with 100 pF.

±
±

=±15V. The LM118 is in a unity-gain non-inverting configuration. VINis stepped from −7.5V to +7.5V and vice versa. The slew

S

= 25˚C 2 4 4 10 mV

A

= 25˚C 6 50 30 200 nA

A

= 25˚C 120 250 150 500 nA

A

= 25˚C 1 3 0.5 3 MΩ

A

= 25˚C 5 8 5 10 mA

A

= 25˚C, VS=±15V 50 200 25 200 V/mV

A

V

=±10V, RL≥ 2kΩ

OUT

= 25˚C, VS=±15V, AV= 1 50 70 50 70 V/µs

A

(Note 6)

= 25˚C, VS=±15V 15 15 MHz

A

= 125˚C 4.5 7 mA

A

=±15V, V

S

R

≥ 2kΩ

L

=±15V, RL=2kΩ

S

=±15V

S

15V, the absolute maximum input voltage is equal to the supply voltage.

5V ≤ VS≤±20V and −55˚C ≤ TA≤ +125˚C (LM118), −25˚C ≤ TA≤ +85˚C (LM218), and 0˚C ≤ TA≤ +70˚C (LM318). Also,

=±10V 25 20 V/mV

OUT

±

±

11.5

12

±

13

±

±

11.5 V

12

±

13 V

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Typical Performance Characteristics

LM118, LM218

Input Current Voltage Gain

LM118/LM218/LM318

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Power Supply Rejection Input Noise Voltage

00776627

Common Mode Rejection Supply Current

00776626

00776628

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Typical Performance Characteristics LM118, LM218 (Continued)

Closed Loop Output

Impedance Current Limiting

LM118/LM218/LM318

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Input Current Unity Gain Bandwidth

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Voltage Follower Slew Rate Inverter Settling Time

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Typical Performance Characteristics LM118, LM218 (Continued)

LM118/LM218/LM318

Large Signal Frequency

Response

Voltage Follower Pulse

Response

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Open Loop Frequency

Response

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Large Signal Frequency

Response

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Open Loop Frequency

Response Inverter Pulse Response

00776641

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00776642

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Typical Performance Characteristics

LM318

Input Current Voltage Gain

LM118/LM218/LM318

00776643

Power Supply Rejection Input Noise Voltage

00776645

Common Mode Rejection Supply Current

00776644

00776646

00776647

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00776648

Typical Performance Characteristics LM318 (Continued)

Closed Loop Output Impedance Current Limiting

LM118/LM218/LM318

00776649

Input Current Unity Gain Bandwidth

00776651 00776652

Voltage Follower Slew Rate Inverter Settling Time

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00776653

00776654

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Typical Performance Characteristics LM318 (Continued)

LM118/LM218/LM318

Large Signal Frequency

Response

Voltage Follower Pulse

Response

00776655

Open Loop Frequency

Response

00776656

Large Signal Frequency

Response

00776657

Open Loop Frequency

Response Inverter Pulse Response

00776659

00776658

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LM118/LM218/LM318

Auxiliary Circuits

Feedforward Compensation

for Greater Inverting Slew Rate

(Note 9)

*Balance circuit necessary for increased slew.

Note 9: Slew rate typically 150V/µs.

Compensation for Minimum Settling Time

(Note 10)

Offset Balancing

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Isolating Large Capacitive Loads

00776608

00776609

Note 10: Slew and settling time to 0.1% for a 10V step change is 800 ns.

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Overcompensation

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Typical Applications

LM118/LM218/LM318

Fast Voltage Follower

(Note 11)

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Integrator or Slow Inverter

CF= Large

≥ 50 pF)

(C

F

*Do not hard-wire as integrator or slow inverter; insert a 10k-5 pF network in series with the input, to prevent oscillation.

Note 11: Do not hard-wire as voltage follower (R1 ≥ 5kΩ)

Fast Summing Amplifier

00776615

00776614

Differential Amplifier

00776616

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Typical Applications (Continued)

D/A Converter Using Ladder Network

LM118/LM218/LM318

Fast Sample and Hold

00776618

*Optional —Reduces settling time.

00776619

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Typical Applications (Continued)

LM118/LM218/LM318

Four Quadrant Multiplier

∆Output zero.

*“Y” zero

+“X” zero

‡

Full scale adjust.

*Optional —Reduces settling time.

00776617

D/A Converter Using Binary Weighted Network

00776620

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Typical Applications (Continued)

Fast Summing Amplifier with Low Input Current

LM118/LM218/LM318

00776621

Wein Bridge Sine Wave Oscillator

Instrumentation Amplifier

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Schematic Diagram

LM118/LM218/LM318

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LM118/LM218/LM318

Connection Diagram

Dual-In-Line Package

Top View

Order Number LM118J/883 (Note 13)

See NS Package Number J14A

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Metal Can Package

(Note 12)

Dual-In-Line Package

00776603

Top View

Order Number LM118J-8/883 (Note 13),

LM318M or LM318N

See NS Package Number J08A, M08A or N08B

Order Number LM118H, LM118H/883 (Note 13),

LM218H or LM318H

See NS Package Number H08C

Note 12: Pin connections shown on schematic diagram and typical applica-

tions are for TO-5 package.

Top View

00776602

Note 13: Available per JM38510/10107.

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Physical Dimensions inches (millimeters)

unless otherwise noted

LM118/LM218/LM318

Metal Can Package (H)

Order Number LM118H, LM118H/883, LM218H or LM318H

NS Package Number H08C

Ceramic Dual-In-Line Package (J)

Order Number LM118J-8/883

NS Package Number J08A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

Ceramic Dual-In-Line Package (J)

Order Number LM118J/883

NS Package Number J14A

LM118/LM218/LM318

S.O. Package (M)

Order Number LM318M or LM318MX

NS Package Number M08A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

LM118/LM218/LM318 Operational Amplifiers

Molded Dual-In-Line Package (N)

Order Number LM318N

NS Package Number N08E

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