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, 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 n n n n n n 15 MHz small signal bandwidth Guaranteed 50V/µs slew rate Maximum bias current of 250 nA Operates from supplies of ± 5V to ± 20V Internal frequency compensation Input and output overload protected Pin compatible with general purpose op amps Fast Voltage Follower (Note 1) 00776613 Note 1: Do not hard-wire as voltage follower (R1 ≥ 5 kΩ) © 2004 National Semiconductor Corporation DS007766 www.national.com LM118/LM218/LM318 Operational Amplifiers August 2000 LM118/LM218/LM318 Absolute Maximum Ratings (Note 7) Lead Temperature (Soldering, 10 sec.) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. 300˚C Plastic Package 260˚C Soldering Information ± 20V Supply Voltage Hermetic Package Dual-In-Line Package Power Dissipation (Note 2) 500 mW Soldering (10 sec.) Differential Input Current (Note 3) ± 10 mA ± 15V Small Outline Package 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 Storage Temperature Range 260˚C 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 −65˚C to +150˚C Electrical Characteristics (Note 5) Parameter Conditions LM118/LM218 Min LM318 Typ Max Input Offset Voltage TA = 25˚C 2 4 4 10 mV Input Offset Current TA = 25˚C 6 50 30 200 nA Input Bias Current TA = 25˚C 120 250 150 500 Input Resistance TA = 25˚C Supply Current TA = 25˚C Large Signal Voltage Gain TA = 25˚C, VS = ± 15V Slew Rate TA = 25˚C, VS = ± 15V, AV = 1 1 3 50 50 Min Typ Units Max nA 0.5 3 200 25 200 V/mV 70 50 70 V/µs 5 8 5 MΩ 10 mA VOUT = ± 10V, RL ≥ 2 kΩ (Note 6) Small Signal Bandwidth TA = 25˚C, VS = ± 15V 15 15 MHz Input Offset Voltage 6 15 mV Input Offset Current 100 300 nA 500 750 Input Bias Current Supply Current TA = 125˚C Large Signal Voltage Gain VS = ± 15V, VOUT = ± 10V 4.5 25 7 nA mA 20 V/mV RL ≥ 2 kΩ Output Voltage Swing VS = ± 15V, RL = 2 kΩ Input Voltage Range VS = ± 15V ± 12 ± 11.5 ± 13 ± 12 ± 11.5 ± 13 Common-Mode Rejection Ratio 80 100 70 100 dB Supply Voltage Rejection Ratio 70 80 65 80 dB V V 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 ± 15V, the absolute maximum input voltage is equal to the supply voltage. Note 5: These specifications apply for ± 5V ≤ VS ≤ ± 20V and −55˚C ≤ TA ≤ +125˚C (LM118), −25˚C ≤ TA ≤ +85˚C (LM218), and 0˚C ≤ TA ≤ +70˚C (LM318). Also, power supplies must be bypassed with 0.1 µF disc capacitors. Note 6: Slew rate is tested with VS = ± 15V. The LM118 is in a unity-gain non-inverting configuration. VIN is stepped from −7.5V to +7.5V and vice versa. The slew 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. www.national.com 2 LM118/LM218/LM318 Typical Performance Characteristics LM118, LM218 Input Current Voltage Gain 00776626 00776625 Power Supply Rejection Input Noise Voltage 00776627 00776628 Common Mode Rejection Supply Current 00776629 00776630 3 www.national.com LM118/LM218/LM318 Typical Performance Characteristics LM118, LM218 (Continued) Closed Loop Output Impedance Current Limiting 00776632 00776631 Input Current Unity Gain Bandwidth 00776634 00776633 Voltage Follower Slew Rate Inverter Settling Time 00776636 00776635 www.national.com 4 LM118/LM218/LM318 Typical Performance Characteristics LM118, LM218 (Continued) Large Signal Frequency Response Open Loop Frequency Response 00776637 00776638 Voltage Follower Pulse Response Large Signal Frequency Response 00776640 00776639 Open Loop Frequency Response Inverter Pulse Response 00776642 00776641 5 www.national.com LM118/LM218/LM318 Typical Performance Characteristics LM318 Input Current Voltage Gain 00776643 00776644 Power Supply Rejection Input Noise Voltage 00776645 00776646 Common Mode Rejection Supply Current 00776648 00776647 www.national.com 6 LM118/LM218/LM318 Typical Performance Characteristics LM318 (Continued) Closed Loop Output Impedance Current Limiting 00776650 00776649 Input Current Unity Gain Bandwidth 00776651 00776652 Voltage Follower Slew Rate Inverter Settling Time 00776653 00776654 7 www.national.com LM118/LM218/LM318 Typical Performance Characteristics LM318 (Continued) Large Signal Frequency Response Open Loop Frequency Response 00776655 00776656 Voltage Follower Pulse Response Large Signal Frequency Response 00776658 00776657 Open Loop Frequency Response Inverter Pulse Response 00776659 www.national.com 00776660 8 LM118/LM218/LM318 Auxiliary Circuits Offset Balancing Feedforward Compensation for Greater Inverting Slew Rate (Note 9) 00776610 Isolating Large Capacitive Loads 00776608 *Balance circuit necessary for increased slew. Note 9: Slew rate typically 150V/µs. Compensation for Minimum Settling Time (Note 10) 00776611 Overcompensation 00776612 00776609 Note 10: Slew and settling time to 0.1% for a 10V step change is 800 ns. 9 www.national.com LM118/LM218/LM318 Typical Applications Fast Voltage Follower (Note 11) 00776613 Integrator or Slow Inverter 00776614 CF = Large (CF ≥ 50 pF) *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 ≥ 5 kΩ) Differential Amplifier Fast Summing Amplifier 00776616 00776615 www.national.com 10 LM118/LM218/LM318 Typical Applications (Continued) Fast Sample and Hold 00776618 D/A Converter Using Ladder Network 00776619 *Optional — Reduces settling time. 11 www.national.com LM118/LM218/LM318 Typical Applications (Continued) Four Quadrant Multiplier 00776617 ∆Output zero. *“Y” zero +“X” zero ‡ Full scale adjust. D/A Converter Using Binary Weighted Network 00776620 *Optional — Reduces settling time. www.national.com 12 LM118/LM218/LM318 Typical Applications (Continued) Fast Summing Amplifier with Low Input Current 00776621 Instrumentation Amplifier Wein Bridge Sine Wave Oscillator 00776622 00776623 13 www.national.com LM118/LM218/LM318 Schematic Diagram 00776601 www.national.com 14 LM118/LM218/LM318 Connection Diagram Dual-In-Line Package 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 00776624 Top View Order Number LM118J/883 (Note 13) See NS Package Number J14A Metal Can Package (Note 12) 00776602 Top View 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 applications are for TO-5 package. Note 13: Available per JM38510/10107. 15 www.national.com LM118/LM218/LM318 Physical Dimensions inches (millimeters) unless otherwise noted 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 www.national.com 16 LM118/LM218/LM318 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Ceramic Dual-In-Line Package (J) Order Number LM118J/883 NS Package Number J14A S.O. Package (M) Order Number LM318M or LM318MX NS Package Number M08A 17 www.national.com LM118/LM218/LM318 Operational Amplifiers Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Dual-In-Line Package (N) Order Number LM318N NS Package Number N08E LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. 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