LM101AH

LM101A/LM201A/LM301A Operational Amplifiers September 1999 LM101A/LM201A/LM301A Operational Amplifiers General Description The LM101A series are general purpose operational amplifiers which feature improved performance over industry standards like the LM709. Advanced processing techniques make possible an order of magnitude reduction in input currents, and a redesign of the biasing circuitry reduces the temperature drift of input current. Improved specifications include: and output, no latch-up when the common mode range is exceeded, and freedom from oscillations and compensation with a single 30 pF capacitor. It has advantages over internally compensated amplifiers in that the frequency compensation can be tailored to the particular application. For example, in low frequency circuits it can be overcompensated for increased stability margin. Or the compensation can be optimized to give more than a factor of ten improvement in high frequency performance for most applications. In addition, the device provides better accuracy and lower noise in high impedance circuitry. The low input currents also make it particularly well suited for long interval integrators or timers, sample and hold circuits and low frequency waveform generators. Further, replacing circuits where matched transistor pairs buffer the inputs of conventional IC op amps, it can give lower offset voltage and a drift at a lower cost. The LM101A is guaranteed over a temperature range of −55˚C to +125˚C, the LM201A from −25˚C to +85˚C, and the LM301A from 0˚C to +70˚C. • • • • • • Offset voltage 3 mV maximum over temperature (LM101A/LM201A) Input current 100 nA maximum over temperature (LM101A/LM201A) Offset current 20 nA maximum over temperature (LM101A/LM201A) Guaranteed drift characteristics Offsets guaranteed over entire common mode and supply voltage ranges Slew rate of 10V/µs as a summing amplifier This amplifier offers many features which make its application nearly foolproof: overload protection on the input Connection Diagrams (Top View) Ceramic Flatpack Package Dual-In-Line Package DS007752-4 DS007752-40 Order Number LM101AJ, LM101J/883 (Note 1), LM201AN or LM301AN See NS Package Number J08A or N08E Order Number LM101AW/883 or LM101W/883 See NS Package Number W10A © 1999 National Semiconductor Corporation DS007752 www.national.com Connection Diagrams (Top View) (Continued) Metal Can Package Dual-In-Line Package DS007752-2 Note: Pin 4 connected to case. DS007752-3 Order Number LM101AH, LM101AH/883 (Note 1), LM201AH or LM301AH See NS Package Number H08C Note 1: Available per JM38510/10103. Order Number LM101AJ-14/883 (Note 1) See NS Package Number J14A www.national.com 2 Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. LM101A/LM201A Supply Voltage Differential Input Voltage Input Voltage (Note 3) Output Short Circuit Duration (Note 4) Operating Ambient Temp. Range TJ Max H-Package N-Package J-Package Power Dissipation at TA = 25˚C H-Package (Still Air) (400 LF/Min Air Flow) N-Package J-Package Thermal Resistance (Typical) θjA H-Package (Still Air) (400 LF/Min Air Flow) N Package J-Package (Typical) θjC H-Package Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Metal Can or Ceramic Plastic ESD Tolerance (Note 7) 300˚C 260˚C 2000V 300˚C 260˚C 2000V 25˚C/W −65˚C to +150˚C 25˚C/W −65˚C to +150˚C 165˚C/W 67˚C/W 135˚C/W 110˚C/W 165˚C/W 67˚C/W 135˚C/W 110˚CmW 500 mW 1200 mW 900 mW 1000 mW 300 mW 700 mW 500 mW 650 mW 150˚C 150˚C 150˚C 100˚C 100˚C 100˚C LM301A ± 22V ± 30V ± 15V Continuous −55˚C to +125˚C (LM101A) −25˚C to +85˚C (LM201A) ± 18V ± 30V ± 15V Continuous 0˚C to +70˚C Electrical Characteristics (Note 5) TA = TJ Parameter Input Offset Voltage Input Offset Current Input Bias Current Input Resistance Supply Current Large Signal Voltage Gain Input Offset Voltage Average Temperature Coefficient of Input Offset Voltage Input Offset Current Average Temperature Coefficient of Input Offset Current Input Bias Current Supply Current TA = TMAX, VS = ± 20V 3 Conditions TA = 25˚C, RS ≤ 50 kΩ TA = 25˚C TA = 25˚C TA = 25˚C TA = 25˚C VS = ± 20V VS = ± 15V LM101A/LM201A Min Typ 0.7 1.5 30 1.5 4.0 1.8 50 160 3.0 3.0 15 20 3.0 Max Min 2.0 10 75 0.5 LM301A Typ 2.0 3.0 70 2.0 1.8 25 160 10 6.0 30 70 0.01 0.02 0.3 0.6 0.3 3.0 Max 7.5 50 250 Units mV nA nA MΩ mA mA V/mV mV µV/˚C nA nA/˚C nA/˚C µA mA www.national.com TA = 25˚C, VS = ± 15V VOUT = ± 10V, RL ≥ 2 kΩ RS ≤ 50 kΩ RS ≤ 50 kΩ 25˚C ≤ TA ≤ TMAX TMIN ≤ TA ≤ 25˚C 0.01 0.02 1.2 0.1 0.2 0.1 2.5 Electrical Characteristics (Note 5) TA = TJ Parameter Large Signal Voltage Gain Output Voltage Swing Input Voltage Range (Continued) Conditions VS = ± 15V, VOUT = ± 10V RL ≥ 2k VS = ± 15V VS = ± 20V VS = ± 15V RS ≤ 50 kΩ RS ≤ 50 kΩ RL = 10 kΩ RL = 2 kΩ LM101A/LM201A Min 25 Typ Max Min 15 LM301A Typ Max Units V/mV ± 12 ± 10 ± 15 ± 14 ± 13 +15, −13 ± 12 ± 10 ± 12 70 70 ± 14 ± 13 +15, −13 90 96 V V V V dB dB Common-Mode Rejection Ratio Supply Voltage Rejection Ratio 80 80 96 96 Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Operating ratings indicate for which the device is functional, but do no guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance. Note 3: For supply voltages less than ± 15V, the absolute maximum input voltage is equal to the supply voltage. Note 4: Continuous short circuit is allowed for case temperatures to 125˚C and ambient temperatures to 75˚C for LM101A/LM201A, and 70˚C and 55˚C respectively for LM301A. Note 5: Unless otherwise specified, these specifications apply for C1 = 30 pF, ± 5V ≤ VS ≤ ± 20V and −55˚C ≤ TA ≤ +125˚C (LM101A), ± 5V ≤ VS ≤ ± 20V and −25˚C ≤ TA ≤ +85˚C (LM201A), ± 5V ≤ VS ≤ ± 15V and 0˚C ≤ TA ≤ +70˚C (LM301A). Note 6: Refer to RETS101AX for LM101A military specifications and RETS101X for LM101 military specifications. Note 7: Human body model, 100 pF discharged through 1.5 kΩ. Guaranteed Performance Characteristics Input Voltage Range Output Swing LM101A/LM201A Voltage Gain DS007752-41 DS007752-42 DS007752-43 Guaranteed Performance Characteristics Input Voltage Range Output Swing LM301A Voltage Gain DS007752-44 DS007752-45 DS007752-46 www.national.com 4 Typical Performance Characteristics Supply Current Voltage Gain Maximum Power Dissipation DS007752-47 DS007752-48 DS007752-49 Input Current, LM101A/LM201A/LM301A Current Limiting Input Noise Voltage DS007752-51 DS007752-52 DS007752-50 Input Noise Current Common Mode Rejection Power Supply Rejection DS007752-53 DS007752-54 DS007752-55 5 www.national.com Typical Performance Characteristics Closed Loop Output Impedance (Continued) DS007752-56 Typical Performance Characteristics for Various Compensation Circuits (Note 9) Single Pole Compensation Two Pole Compensation DS007752-8 DS007752-12 CS= 30 pF CS= 30 pF C2 = 10 C1 Feedforward Compensation DS007752-16 fo = 3 MHz www.national.com 6 Typical Performance Characteristics for Various Compensation Circuits (Note 9) (Continued) Open Loop Frequency Response Open Loop Frequency Response Open Loop Frequency Response DS007752-9 DS007752-13 DS007752-17 Large Signal Frequency Response Large Signal Frequency Response Large Signal Frequency Response DS007752-10 DS007752-14 DS007752-18 Voltage Follower Pulse Response Voltage Follower Pulse Response Inverter Pulse Response DS007752-19 DS007752-11 DS007752-15 7 www.national.com Typical Applications (Note 9) Simulated Inductor Variable Capacitance Multiplier DS007752-20 DS007752-21 L ≅ R1 R2 C1 RS = R2 RP = R1 Fast Inverting Amplifier with High Input Impedance Inverting Amplifier with Balancing Circuit DS007752-22 DS007752-23 †May be zero or equal to parallel combination of R1 and R2 for minimum offset. Sine Wave Oscillator DS007752-24 fo = 10 kHz www.national.com 8 Typical Applications (Note 9) (Continued) Integrator with Bias Current Compensation DS007752-25 *Adjust for zero integrator drift. Current drift typically 0.1 nA/˚C over −55˚C to +125˚C temperature range. Application Hints (Note 9) Protecting Against Gross Fault Conditions Compensating for Stray Input Capacitances or Large Feedback Resistor DS007752-26 *Protects input †Protects output ‡ Protects output — not needed when R4 is used. DS007752-27 Isolating Large Capacitive Loads DS007752-28 Although the LM101A is designed for trouble free operation, experience has indicated that it is wise to observe certain precautions given below to protect the devices from abnormal operating conditions. It might be pointed out that the ad9 vice given here is applicable to practically any IC op amp, although the exact reason why may differ with different devices. www.national.com Application Hints (Note 9) (Continued) When driving either input from a low-impedance source, a limiting resistor should be placed in series with the input lead to limit the peak instantaneous output current of the source to something less than 100 mA. This is especially important when the inputs go outside a piece of equipment where they could accidentally be connected to high voltage sources. Large capacitors on the input (greater than 0.1 µF) should be treated as a low source impedance and isolated with a resistor. Low impedance sources do not cause a problem unless their output voltage exceeds the supply voltage. However, the supplies go to zero when they are turned off, so the isolation is usually needed. The output circuitry is protected against damage from shorts to ground. However, when the amplifier output is connected to a test point, it should be isolated by a limiting resistor, as test points frequently get shorted to bad places. Further, when the amplifer drives a load external to the equipment, it is also advisable to use some sort of limiting resistance to preclude mishaps. Precautions should be taken to insure that the power supplies for the integrated circuit never become reversed — even under transient conditions. With reverse voltages greater than 1V, the IC will conduct excessive cur- rent, fusing internal aluminum interconnects. If there is a possibility of this happening, clamp diodes with a high peak current rating should be installed on the supply lines. Reversal of the voltage between V+ and V− will always cause a problem, although reversals with respect to ground may also give difficulties in many circuits. The minimum values given for the frequency compensation capacitor are stable only for source resistances less than 10 kΩ, stray capacitances on the summing junction less than 5 pF and capacitive loads smaller than 100 pF. If any of these conditions are not met, it becomes necessary to overcompensate the amplifier with a larger compensation capacitor. Alternately, lead capacitors can be used in the feedback network to negate the effect of stray capacitance and large feedback resistors or an RC network can be added to isolate capacitive loads. Although the LM101A is relatively unaffected by supply bypassing, this cannot be ignored altogether. Generally it is necessary to bypass the supplies to ground at least once on every circuit card, and more bypass points may be required if more than five amplifiers are used. When feed-forward compensation is employed, however, it is advisable to bypass the supply leads of each amplifier with low inductance capacitors because of the higher frequencies involved. Typical Applications (Note 9) Fast Voltage Follower Standard Compensation and Offset Balancing Circuit DS007752-31 DS007752-29 Power Bandwidth: 15 kHz Slew Rate: 1V/µs www.national.com 10 Typical Applications (Note 9) (Continued) Bilateral Current Source Fast Summing Amplifier DS007752-30 Power Bandwidth: 250 kHz Small Signal Bandwiidth: 3.5 MHz Slew Rate: 10V/µs DS007752-32 R3 = R4 + R5 R1 = R2 Fast AC/DC Converter (Note 8) DS007752-33 Note 8: Feedforward compensation can be used to make a fast full wave rectifier without a filter. 11 www.national.com Typical Applications (Note 9) (Continued) Instrumentation Amplifier DS007752-34 R1 = R4; R2 = R3 *,† Matching determines CMRR. Integrator with Bias Current Compensation Voltage Comparator for Driving RTL Logic or High Current Driver DS007752-37 DS007752-35 *Adjust for zero integrator drift. Current drift typically 0.1 nA/˚C over 0˚C to +70˚C temperature range. www.national.com 12 Typical Applications (Note 9) (Continued) Low Frequency Square Wave Generator DS007752-36 Low Drift Sample and Hold Voltage Comparator for Driving DTL or TTL Integrated Circuits DS007752-39 DS007752-38 *Polycarbonate-dielectric capacitor 13 www.national.com Schematic (Note 9) DS007752-1 Note 9: Pin connections shown are for 8-pin packages. www.national.com 14 Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM101AH, LM101AH/883 LM201AH or LM301AH NS Package Number H08C Ceramic Dual-In-Line Package (J) Order Number LM101J/883 or LM101AJ NS Package Number J08A 15 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Ceramic Dual-In-Line Package (J) Order Number LM101AJ-14/883 NS Package Number J14A Molded Dual-In-Line Package (N) Order Number LM201AN or LM301AN NS Package Number N08E www.national.com 16 LM101A/LM201A/LM301A Operational Amplifiers Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Ceramic Flatpack Package (W) Order Number LM101AW/883 or LM101W/883 NS Package Number W10A 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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