LM2924中文资料
LM392/LM2924
Low Power Operational Amplifier/Voltage Comparator
General Description
The LM392series consists of 2independent building block circuits.One is a high gain,internally frequency compen-sated operational amplifier,and the other is a precision volt-age comparator.Both the operational amplifier and the volt-age 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 in-put down to ground when operating from a single power sup-ply.Operation from split power supplies is also possible and the low power supply current is independent of the magni-tude 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 cir-cuits.Both circuits can be operated directly from the stan-dard 5V DC 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 LM392extremely 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 LM358dual op amp and the LM393dual 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:600μA
n Low input biasing current:50nA n Low input offset voltage:2mV n Low input offset current:5nA
n Input common-mode voltage range includes ground n Differential input voltage range equal to the power supply voltage ADDITIONAL OP AMP FEATURES
n Internally frequency compensated for unity gain n Large DC voltage gain:100dB
n Wide bandwidth (unity gain):1MHz
n
Large output voltage swing:0V to V +?1.5V
ADDITIONAL COMPARATOR FEATURES
n Low output saturation voltage:250mV at 4mA
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
April 1998
LM392/LM2924Low Power Operational Amplifier/Voltage Comparator
?1999National Semiconductor Corporation https://www.wendangku.net/doc/6b1082949.html,
Absolute Maximum Ratings(Note1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM392LM2924 Supply Voltage,V+32V or±16V26V or±13V
Differential Input Voltage32V26V
Input Voltage?0.3V to+32V?0.3V to+26V
Power Dissipation(Note2)
Molded DIP(LM392N,LM2924N)820mW820mW
Small Outline Package(LM392M,LM2924M)530mW530mW
Output Short-Circuit to Ground(Note3)Continuous Continuous
Input Current(V IN
Operating Temperature Range0?C to+70?C?40?C to+85?C
Storage Temperature Range?65?C to+150?C?65?C to+150?C Lead Temperature(Soldering,10seconds)260?C260?C
ESD rating to be determined.
Soldering Information
Dual-in-Line Package
Soldering(10seconds)260?C260?C
Small Outline Package
Vapor Phase(60seconds)215?C215?C
Infrared(15seconds)220?C220?C See AN-450“Surface Mounting Methods and Their Effect on Product Reliability”for other methods of soldering
surface mount devices.
Electrical Characteristics
(V+=5V DC;specifications apply to both amplifiers unless otherwise stated)(Note5)
Parameter Conditions LM392LM2924Units
Min Typ Max Min Typ Max
Input Offset Voltage T A=25?C,(Note6)±2±5±2±7mV Input Bias Current IN(+)or IN(?),T A=25?C,5025050250nA
(Note7),V CM=0V
Input Offset Current IN(+)?IN(?),T A=25?C±5±50±5±50nA Input Common-Mode Voltage V+=30V DC,T A=25?C,
Range(Note8)(LM2924,0V+?1.50V+?1.5V
V+=26V DC)
Supply Current R L=∞,V+=30V,1212mA
(LM2924,V+=26V)
Supply Current R L=∞,V+=5V0.510.51mA Amplifier-to-Amplifier Coupling f=1kHz to20kHz,
T A=25?C,Input Referred,?100?100dB
(Note9)
Input Offset Voltage(Note6)±7±10mV Input Bias Current IN(+)or IN(?)400500nA Input Offset Current IN(+)?IN(?)150200nA Input Common-Mode Voltage V+=30V DC,(Note8)0V+?20V+?2V Range(LM2924,V+=26V DC)
Differential Input Voltage Keep All V IN’s≥0V DC3226V
(or V?,if Used),(Note10)
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Electrical Characteristics(Continued)
(V+=5V DC;specifications apply to both amplifiers unless otherwise stated)(Note5)
Parameter Conditions LM392LM2924Units
Min Typ Max Min Typ Max
OP AMP ONLY
Large Signal Voltage Gain V+=15V DC,V o swing=
1V DC to11V DC,2510025100V/mV
R L=2k?,T A=25?C
Output Voltage Swing R L=2k?,T A=25?C,0V+?1.50V+?1.5V
(LM2924,R L≥10k?)
Common-Mode Rejection DC,T A=25?C,V CM=65705070dB Ratio0V DC to V+?1.5V DC
Power Supply Rejection Ratio DC,T A=25?C6510050100dB Output Current Source V IN(+)=1V DC,
V IN(?)=0V DC,20402040mA
V+=15V DC,V o=
2V DC,T A=25?C
Output Current Sink V IN(?)=1V DC,
V IN(+)=0V DC,10201020mA
V+=15V DC,V o=
2V DC,T A=25?C
V IN(?)=1V DC,
V IN(+)=0V DC,12501250μA
V+=15V DC,V o=
200mV,T A=25?C
Input Offset Voltage Drift R S=0?77μV/?C Input Offset Current Drift R S=0?1010pA DC/?C COMPARATOR ONLY
Voltage Gain R L≥15k?,V+=15V DC,5020025100V/mV
T A=25?C
Large Signal Response Time V IN=TTL Logic Swing,
V REF=1.4V DC300300ns
V RL=5V DC,R L=5.1k?,
T A=25?C
Response Time V RL=5V DC,R L=5.1k?, 1.3 1.5μs
T A=25?C,(Note11)
Output Sink Current V IN(?)=1V DC,
V IN(+)=0V DC,616616mA
V o≥1.5V DC,T A=25?C
Saturation Voltage V IN(?)≥1V DC,
V IN(+)=0,250400400mV
I SINK≤4mA,T A=25?C
V IN(?)≥1V DC,
V IN(+)=0,700700mV
I SINK≤4mA
Output Leakage Current V IN(?)=0,
V IN(+)≥1V DC,0.10.1nA
V o=5V DC,T A=25?C
V IN(?)=0,
V IN(+)≥1V DC, 1.0 1.0μA
V o=30V DC
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Electrical Characteristics(Continued)
Note1:“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.
Note2:For operating at temperatures above25?C,the LM392and the LM2924must be derated based on a125?C maximum junction temperature and a thermal resistance of122?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.
Note3: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 approximately40mA for the op amp and30mA for the comparator independent of the magnitude of V+.At values of supply voltage in excess of15V,con-tinuous short circuits can exceed the power dissipation ratings and cause eventual destruction.
Note4: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 tran-sistors 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(at25?C).
Note5:These specifications apply for V+=5V,unless otherwise stated.For the LM392,temperature specifications are limited to0?C≤T A≤+70?C and the LM2924 temperature specifications are limited to?40?C≤T A≤+85?C.
Note6:At output switch point,V O?1.4V,R S=0?with V+from5V to30V;and over the full input common-mode range(0V to V+?1.5V).
Note7: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.
Note8:The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than0.3V.The upper end of the common-mode voltage range is V+?1.5V,but either or both inputs can go to32V without damage(26V for LM2924).
Note9: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.
Note10: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(or0.3V below the magnitude of the negative power supply,if used)on either amplifier.
Note11:The response time specified is for a100mV input step with5mV overdrive.For larger overdrive signals300ns can be obtained.
Schematic Diagram
DS007793-2 Application Hints
Please refer to the application hints section of the LM193and the LM158datasheets.
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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
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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.
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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L M 392/L M 2924L o w P o w e r O p e r a t i o n a l A m p l i f i e r /V o l t a g e C o m p a r a t o r
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