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: * 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 * Slew rate of 10V/s as a summing amplifier This amplifier offers many features which make its application nearly foolproof: overload protection on the input Offsets guaranteed over entire common mode and supply voltage ranges Fast AC/DC Converter 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 -55C to +125C, the LM201A from -25C to +85C, and the LM301A from 0C to +70C. (Note 1) DS007752-33 Note 1: Feedforward compensation can be used to make a fast full wave rectifier without a filter. (c) 2000 National Semiconductor Corporation DS007752 www.national.com LM101A/LM201A/LM301A Operational Amplifiers August 2000 LM101A/LM201A/LM301A 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 LM301A 22V 30V 15V 18V 30V 15V Supply Voltage Differential Input Voltage Input Voltage (Note 3) Output Short Circuit Duration (Note 4) Operating Ambient Temp. Range Continuous Continuous -55C to +125C (LM101A) 0C to +70C -25C to +85C (LM201A) TJ Max H-Package 150C 100C N-Package 150C 100C J-Package 150C 100C Power Dissipation at TA = 25C H-Package (Still Air) (400 LF/Min Air Flow) 500 mW 300 mW 1200 mW 700 mW N-Package 900 mW 500 mW J-Package 1000 mW 650 mW 165C/W 165C/W Thermal Resistance (Typical) jA H-Package (Still Air) 67C/W 67C/W N Package (400 LF/Min Air Flow) 135C/W 135C/W J-Package 110C/W 110CmW (Typical) jC H-Package Storage Temperature Range 25C/W 25C/W -65C to +150C -65C to +150C Lead Temperature (Soldering, 10 sec.) Metal Can or Ceramic 300C 300C Plastic 260C 260C 2000V 2000V ESD Tolerance (Note 7) Electrical Characteristics (Note 5) TA = TJ Parameter Conditions LM101A/LM201A Min Typ LM301A Max Min Units Typ Max Input Offset Voltage TA = 25C, RS 50 k 0.7 2.0 2.0 7.5 mV Input Offset Current TA = 25C 1.5 10 3.0 50 nA Input Bias Current TA = 25C 30 75 70 250 nA Input Resistance TA = 25C Supply Current TA = 25C 1.5 VS = 20V 4.0 1.8 0.5 TA = 25C, VS = 15V 1.8 50 M mA VS = 15V Large Signal Voltage Gain 2.0 3.0 160 25 3.0 160 mA V/mV VOUT = 10V, RL 2 k Input Offset Voltage RS 50 k Average Temperature Coefficient RS 50 k 3.0 15 Average Temperature Coefficient 25C TA TMAX 0.01 of Input Offset Current TMIN TA 25C TA = TMAX, VS = 20V 3.0 10 mV 6.0 30 V/C 70 nA 0.1 0.01 0.3 nA/C 0.02 0.2 0.02 0.6 nA/C 1.2 2.5 of Input Offset Voltage Input Offset Current 20 Input Bias Current Supply Current www.national.com 0.1 2 0.3 A mA (Continued) TA = T J Parameter Conditions LM101A/LM201A Min VS = 15V, VOUT = 10V Large Signal Voltage Gain Typ LM301A Max Min 25 Typ 15 Units Max V/mV RL 2k VS = 15V Output Voltage Swing RL = 10 k RL = 2 k VS = 20V VS = 15V Input Voltage Range 12 10 15 14 13 12 10 14 13 +15, -13 12 +15, -13 V V V V Common-Mode Rejection Ratio RS 50 k 80 96 70 90 dB Supply Voltage Rejection Ratio RS 50 k 80 96 70 96 dB 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 125C and ambient temperatures to 75C for LM101A/LM201A, and 70C and 55C respectively for LM301A. Note 5: Unless otherwise specified, these specifications apply for C1 = 30 pF, 5V VS 20V and -55C TA +125C (LM101A), 5V VS 20V and -25C TA +85C (LM201A), 5V VS 15V and 0C TA +70C (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 k. Typical Performance Characteristics Input Voltage Range LM101A/LM201A Output Swing Voltage Gain DS007752-43 DS007752-42 DS007752-41 Guaranteed Performance Characteristics LM301A Input Voltage Range Output Swing Voltage Gain DS007752-45 DS007752-44 3 DS007752-46 www.national.com LM101A/LM201A/LM301A Electrical Characteristics (Note 5) LM101A/LM201A/LM301A Typical Performance Characteristics Supply Current Voltage Gain Maximum Power Dissipation DS007752-47 Input Current, LM101A/LM201A/LM301A DS007752-48 DS007752-49 Input Noise Voltage Current Limiting DS007752-51 DS007752-52 DS007752-50 Input Noise Current Common Mode Rejection DS007752-53 www.national.com Power Supply Rejection DS007752-54 4 DS007752-55 LM101A/LM201A/LM301A Typical Performance Characteristics (Continued) Closed Loop Output Impedance DS007752-56 Typical Performance Characteristics for Various Compensation Circuits (Note 9) Single Pole Compensation Two Pole Compensation DS007752-8 CS= 30 pF DS007752-12 CS= 30 pF C2 = 10 C1 Feedforward Compensation DS007752-16 fo = 3 MHz 5 www.national.com LM101A/LM201A/LM301A Typical Performance Characteristics for Various Compensation Circuits (Note 9) (Continued) Open Loop Frequency Response Open Loop Frequency Response DS007752-9 Large Signal Frequency Response Open Loop Frequency Response DS007752-13 Large Signal Frequency Response DS007752-10 Voltage Follower Pulse Response DS007752-17 Large Signal Frequency Response DS007752-14 Voltage Follower Pulse Response DS007752-18 Inverter Pulse Response DS007752-19 DS007752-11 www.national.com DS007752-15 6 LM101A/LM201A/LM301A Typical Applications (Note 9) Variable Capacitance Multiplier Simulated Inductor DS007752-20 DS007752-21 L . R1 R2 C1 RS = R2 RP = R1 Fast Inverting Amplifier with High Input Impedance Inverting Amplifier with Balancing Circuit DS007752-23 DS007752-22 May be zero or equal to parallel combination of R1 and R2 for minimum offset. Sine Wave Oscillator DS007752-24 fo = 10 kHz 7 www.national.com LM101A/LM201A/LM301A 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 -55C to +125C temperature range. Application Hints (Note 9) Protecting Against Gross Fault Conditions Compensating for Stray Input Capacitances or Large Feedback Resistor DS007752-26 DS007752-27 *Protects input Protects output Protects output -- not needed when R4 is used. Isolating Large Capacitive Loads DS007752-28 vice given here is applicable to practically any IC op amp, although the exact reason why may differ with different devices. 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 adwww.national.com 8 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. (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 F) 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- Typical Applications The minimum values given for the frequency compensation capacitor are stable only for source resistances less than 10 k, 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. (Note 9) Standard Compensation and Offset Balancing Circuit Fast Voltage Follower DS007752-31 DS007752-29 Power Bandwidth: 15 kHz Slew Rate: 1V/s 9 www.national.com LM101A/LM201A/LM301A Application Hints (Note 9) LM101A/LM201A/LM301A Typical Applications (Note 9) (Continued) Fast Summing Amplifier Bilateral Current Source DS007752-30 Power Bandwidth: 250 kHz Small Signal Bandwiidth: 3.5 MHz Slew Rate: 10V/s 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. www.national.com 10 LM101A/LM201A/LM301A 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 0C to +70C temperature range. 11 www.national.com LM101A/LM201A/LM301A 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 www.national.com 12 LM101A/LM201A/LM301A Schematic (Note 9) DS007752-1 Note 9: Pin connections shown are for 8-pin packages. Connection Diagrams (Top View) Dual-In-Line Package Ceramic Flatpack Package DS007752-4 DS007752-40 Order Number LM101AJ, LM101J/883 (Note 10), LM201AN or LM301AN See NS Package Number J08A or N08E Order Number LM101AW/883 or LM101W/883 See NS Package Number W10A 13 www.national.com LM101A/LM201A/LM301A 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 10), LM201AH or LM301AH See NS Package Number H08C Order Number LM101AJ-14/883 (Note 10) See NS Package Number J14A Note 10: Available per JM38510/10103. www.national.com 14 LM101A/LM201A/LM301A 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 LM101A/LM201A/LM301A 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. 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