LM124A/LM124QML
Low Power Quad Operational Amplifiers
General Description
The LM124/124A consists of four independent, high gain,
internally frequency compensated operational amplifiers
which were designed specifically to operate from a single
power supply over a wide range of voltages. Operation from
split power supplies is also possible and the low power
supply current drain is independent of the magnitude of the
power supply voltage.
Application areas include transducer amplifiers, DC gain
blocks and all the conventional op amp circuits which now
can be more easily implemented in single power supply
systems. For example, the LM124/124A can be directly op-
erated off of the standard +5Vdc power supply voltage which
is used in digital systems and will easily provide the required
interface electronics without requiring the additional +15Vdc
power supplies.
Unique Characteristics
n
In the linear mode the input common-mode voltage
range includes ground and the output voltage can also
swing to ground, even though operated from only a
single power supply voltage
n
The unity gain cross frequency is temperature
compensated
n
The input bias current is also temperature compensated
Advantages
n
Eliminates need for dual supplies
n
Four internally compensated op amps in a single
package
n
Allows directly sensing near GND and V
OUT
also goes
to GND
n
Compatible with all forms of logic
n
Power drain suitable for battery operation
Features
n
Internally frequency compensated for unity gain
n
Large DC voltage gain
100 dB
n
Wide bandwidth (unity gain)
1 MHz
(temperature compensated)
n
Wide power supply range:
Single supply
3V to 32V
or dual supplies
1.5V to
16V
n
Very low supply current drain (700 A) -- essentially
independent of supply voltage
n
Low input biasing current
45 nA
(temperature compensated)
n
Low input offset voltage
2 mV
and offset current:
5 nA
n
Input common-mode voltage range includes ground
n
Differential input voltage range equal to the power
supply voltage
n
Large output voltage swing
0V to V
+
- 1.5V
Ordering Information
NS PART NUMBER
SMD PART NUMBER
NS PACKAGE NUMBER
PACKAGE DISCRIPTION
LM124J/883
7704301CA
J14A
14LD CERDIP
LM124AE/883
77043022A
E20A
20LD LEADLESS CHIP CARRIER
LM124AJ/883
7704302CA
J14A
14LD CERDIP
LM124AW/883
W14B
14LD CERPACK
LM124AWG/883
7704302XA
WG14A
14LD CERAMIC SOIC
LM124AJLQMLV
5962L9950401VCA,
50k rd(Si)
J14A
14LD CERDIP
LM124AJRQMLV
5962R9950401VCA,
100k rd(Si)
J14A
14LD CERDIP
LM124AWGLQMLV
5962L9950401VZA,
50k rd(Si)
WG14A
14LD CERAMIC SOIC
LM124AWGRQMLV
5962R9950401VZA,
100k rd(Si)
WG14A
14LD CERAMIC SOIC
LM124AWLQMLV
5962L9950401VDA,
50k rd(Si)
W14B
14LD CERPACK
LM124AWRQMLV
5962R9950401VDA,
100k rd(Si)
W14B
14LD CERPACK
January 2005
LM124A/LM124QML
Low
Power
Quad
Operational
Amplifiers
2005 National Semiconductor Corporation
DS201080
www.national.com
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
+
32Vdc or +16Vdc
Differential Input Voltage
32Vdc
Input Voltage
-0.3Vdc to +32Vdc
Input Current
(V
IN
<
-0.3Vdc) (Note 4)
50 mA
Power Dissipation (Note 2)
CERDIP
1260mW
CERPACK
700mW
LCC
1350mW
CERAMIC SOIC
700mW
Output Short-Circuit to GND
(One Amplifier) (Note 3)
V
+
15Vdc and T
A
= 25C
Continuous
Operating Temperature Range
-55C
T
A
+125C
Maximum Junction Temperature
150C
Storage Temperature Range
-65C
T
A
+150C
Lead Temperature (Soldering, 10 seconds)
260C
Thermal Resistance ThetaJA
CERDIP (Still Air)
103 C/W
(500LF/Min Air flow)
51 C/W
CERPACK (Still Air)
176 C/W
(500LF/Min Air flow)
116 C/W
LCC (Still Air)
91 C/W
(500LF/Min Air flow)
66 C/W
CERAMIC SOIC (Still Air)
176 C/W
(500LF/Min Air flow)
116 C/W
ThetaJC
CERDIP
19 C/W
CERPACK
18 C/W
LCC
24 C/W
CERAMIC SOIC
18 C/W
Package Weight (Typical)
CERDIP
TBD
CERPACK
TBD
LCC
TBD
CERAMIC SOIC
410mg
ESD Tolerance (Note 5)
250V
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. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by Tjmax (maximum junction temperature), ThetaJA (package
junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is Pdmax = (Tjmax -
TA)/ThetaJA or the number given in the Absolute Maximum Ratings, whichever is lower.
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 40mA independent of the magnitude of V+. At values of supply voltage in excess of +15Vdc, continuous short-circuits can exceed the power
dissipation ratings and cause eventual destruction. Destructive dissipation can result from simultaneous shorts on all amplifiers.
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 op amps 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 -0.3Vdc (at 25 C).
Note 5: Human body model, 1.5 k
in series with 100 pF.
LM124A/LM124QML
www.national.com
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