LM392/LM2924 Low Power Operational Amplifier/Voltage Comparator General Description The LM392 series consists of 2 independent building block circuits. One is a high gain, internally frequency compensated operational amplifier, and the other is a precision voltage comparator. Both the operational amplifier and the voltage comparator have been specifically designed to operate from a single power supply over a wide range of voltages. Both circuits have input stages which will common-mode input down to ground when operating from a single power supply. Operation from split power supplies is also possible and the low power supply current is independent of the magnitude of the supply voltage. Application areas include transducer amplifier with pulse shaper, DC gain block with level detector, VCO, as well as all conventional operational amplifier or voltage comparator circuits. Both circuits can be operated directly from the standard 5 VDC power supply voltage used in digital systems, and the output of the comparator will interface directly with either TTL or CMOS logic. In addition, the low power drain makes the LM392 extremely useful in the design of portable equipment. Advantages n Eliminates need for dual power supplies n An internally compensated op amp and a precision comparator in the same package n Allows sensing at or near ground n Power drain suitable for battery operation n Pin-out is the same as both the LM358 dual op amp and the LM393 dual comparator Features n Wide power supply voltage range Single supply: 3V to 32V Dual supply: ± 1.5V to ± 16V n Low supply current drain — essentially independent of supply voltage: 600 µA n Low input biasing current: 50 nA n Low input offset voltage: 2 mV n Low input offset current: 5 nA n Input common-mode voltage range includes ground n Differential input voltage range equal to the power supply voltage n n n n ADDITIONAL OP AMP FEATURES Internally frequency compensated for unity gain Large DC voltage gain: 100 dB Wide bandwidth (unity gain): 1 MHz Large output voltage swing: 0V to V+ − 1.5V ADDITIONAL COMPARATOR FEATURES n Low output saturation voltage: 250 mV at 4 mA n Output voltage compatible with all types of logic systems Connection Diagram (Amplifier A = Comparator) (Amplifier B = Operational Amplifier) Dual-In-Line Package DS007793-1 (Top View) Order Number LM392M or LM2924M See NS Package Number M08A Order Number LM392N or LM2924N See NS Package Number N08E © 1999 National Semiconductor Corporation DS007793 www.national.com LM392/LM2924 Low Power Operational Amplifier/Voltage Comparator April 1998 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, V+ LM392 LM2924 32V or ± 16V 26V or ± 13V Differential Input Voltage Input Voltage 32V 26V −0.3V to +32V −0.3V to +26V Power Dissipation (Note 2) Molded DIP (LM392N, LM2924N) 820 mW 820 mW Small Outline Package (LM392M, LM2924M) 530 mW 530 mW Output Short-Circuit to Ground (Note 3) Continuous Continuous Input Current (VIN < −0.3 VDC) (Note 4) 50 mA 50 mA 0˚C to +70˚C −40˚C to +85˚C −65˚C to +150˚C −65˚C to +150˚C 260˚C 260˚C 260˚C 260˚C Vapor Phase (60 seconds) 215˚C 215˚C Infrared (15 seconds) 220˚C 220˚C Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 seconds) ESD rating to be determined. Soldering Information Dual-in-Line Package Soldering (10 seconds) Small Outline Package See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” for other methods of soldering surface mount devices. Electrical Characteristics (V+ = 5 VDC; specifications apply to both amplifiers unless otherwise stated) (Note 5) Parameter Conditions LM392 Min Input Offset Voltage Input Bias Current Input Offset Current Input Common-Mode Voltage Range LM2924 Max Min Typ Units Max TA = 25˚C, (Note 6) IN(+) or IN(−), TA = 25˚C, (Note 7) , VCM = 0V ±2 ±5 ±2 ±7 mV 50 250 50 250 nA IN(+) − IN(−), TA = 25˚C V+ = 30 VDC, TA = 25˚C, ±5 ± 50 ±5 ± 50 nA V+−1.5 V Supply Current (Note 8) (LM2924, V+ = 26 VDC) RL = ∞, V+ = 30V, Supply Current (LM2924, V+ = 26V) RL = ∞, V+ = 5V Amplifier-to-Amplifier Coupling Typ V+−1.5 0 f = 1 kHz to 20 kHz, TA = 25˚C, Input Referred, 0 1 2 1 2 mA 0.5 1 0.5 1 mA −100 −100 dB (Note 9) Input Offset Voltage (Note 6) ±7 ± 10 mV Input Bias Current IN(+) or IN(−) 400 500 nA Input Offset Current IN(+) − IN(−) V+ = 30 VDC, (Note 8) (LM2924, V+ = 26 VDC) 150 200 nA V+−2 V 26 V Input Common-Mode Voltage Range Differential Input Voltage 0 Keep All VIN’s ≥ 0 VDC 32 (or V−, if Used), (Note 10) www.national.com V+−2 2 0 Electrical Characteristics (Continued) (V+ = 5 VDC; specifications apply to both amplifiers unless otherwise stated) (Note 5) Parameter Conditions LM392 LM2924 Max Min Typ 25 100 Units Min Typ Max 1 VDC to 11 VDC, RL = 2 kΩ, TA = 25˚C 25 100 Output Voltage Swing RL = 2 kΩ, TA = 25˚C, 0 Common-Mode Rejection (LM2924, RL ≥ 10 kΩ) DC, TA = 25˚C, VCM = 65 70 50 70 dB 0 VDC to V+−1.5 VDC DC, TA = 25˚C 65 100 50 100 dB 20 40 20 40 mA 10 20 10 20 mA 12 50 12 50 µA OP AMP ONLY Large Signal Voltage Gain Ratio Power Supply Rejection Ratio Output Current Source Output Current Sink V+ = 15 VDC, Vo swing = VIN(+) = 1 VDC, VIN(−) = 0 VDC, V+ = 15 VDC, Vo = 2 VDC, TA = 25˚C VIN(−) = 1 VDC, VIN(+) = 0 VDC, V+−1.5 V/mV V+−1.5 0 V V+ = 15 VDC, Vo = 2 VDC, TA = 25˚C VIN(−) = 1 VDC, VIN(+) = 0 VDC, V+ = 15 VDC, Vo = Input Offset Voltage Drift Input Offset Current Drift 200 mV, TA = 25˚C RS = 0Ω RS = 0Ω 7 7 µV/˚C 10 10 pADC/˚C 100 V/mV 300 300 ns 1.3 1.5 µs 16 mA COMPARATOR ONLY Voltage Gain RL ≥ 15 kΩ, V+ = 15 VDC, TA = 25˚C Large Signal Response Time VIN = TTL Logic Swing, VREF = 1.4 VDC 50 200 25 VRL = 5 VDC, RL = 5.1 kΩ, TA = 25˚C Response Time VRL = 5 VDC, RL = 5.1 kΩ, TA = 25˚C, (Note 11) Output Sink Current VIN(−) = 1 VDC, VIN(+) = 0 VDC, 6 16 6 Vo ≥ 1.5 VDC, TA = 25˚C Saturation Voltage VIN(−) ≥ 1 VDC, VIN(+) = 0, 250 400 400 mV 700 700 mV ISINK ≤ 4 mA, TA = 25˚C VIN(−) ≥ 1 VDC, VIN(+) = 0, Output Leakage Current ISINK ≤ 4 mA VIN(−) = 0, VIN(+) ≥ 1 VDC, Vo = 5 VDC, TA = 25˚C VIN(−) = 0, 0.1 VIN(+) ≥ 1 VDC, Vo = 30 VDC 0.1 1.0 3 nA 1.0 µA www.national.com Electrical Characteristics (Continued) Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Note 2: For operating at temperatures above 25˚C, the LM392 and the LM2924 must be derated based on a 125˚C maximum junction temperature and a thermal resistance of 122˚C/W which applies for the device soldered in a printed circuit board, operating in still air ambient. The dissipation is the total of both amplifiers — use external resistors, where possible, to allow the amplifier to saturate or to reduce the power which is dissipated in the integrated circuit. Note 3: Short circuits from the output to V+ can cause excessive heating and eventual destruction. When considering short circuits to ground, the maximum output current is approximately 40 mA for the op amp and 30 mA for the comparator independent of the magnitude of V+. At values of supply voltage in excess of 15V, continuous short circuits can exceed the power dissipation ratings and cause eventual destruction. Note 4: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on the IC chip. This transistor action can cause the output voltages of the amplifiers to go to the V+ voltage level (or to ground for a large overdrive) for the time duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value greater than −0.3V (at 25˚C). Note 5: These specifications apply for V+ = 5V, unless otherwise stated. For the LM392, temperature specifications are limited to 0˚C ≤ TA ≤ +70˚C and the LM2924 temperature specifications are limited to −40˚C ≤ TA ≤ +85˚C. Note 6: At output switch point, VO ≅ 1.4V, RS = 0Ω with V+ from 5V to 30V; and over the full input common-mode range (0V to V+ − 1.5V). Note 7: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output so no loading change exists on the input lines. Note 8: The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode voltage range is V+ − 1.5V, but either or both inputs can go to 32V without damage (26V for LM2924). Note 9: Due to proximity of external components, insure that coupling is not originating via the stray capacitance between these external parts. This typically can be detected as this type of capacitive increases at higher frequencies. Note 10: Positive excursions of input voltage may exceed the power supply level. As long as the other input voltage remains within the common-mode range, the comparator will provide a proper output state. The input voltage to the op amp should not exceed the power supply level. The input voltage state must not be less than −0.3V (or 0.3V below the magnitude of the negative power supply, if used) on either amplifier. Note 11: The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be obtained. Schematic Diagram DS007793-2 Application Hints Please refer to the application hints section of the LM193 and the LM158 datasheets. www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted S.O. Package (M) Order Number LM392M or LM2924M NS Package Number M08A Molded Dual-In-Line Package (N) Order Number LM392N or LM2924N NS Package Number N08E 5 www.national.com LM392/LM2924 Low Power Operational Amplifier/Voltage Comparator Notes 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 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. 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