LM148JAN
LM148JAN Quad 741 Op Amps
Literature Number: SNOSAI2
LM148JAN
Quad 741 Op Amps
General Description
The LM148 is a true quad LM741. It consists of four inde-
pendent, high gain, internally compensated, low power op-
erational amplifiers which have been designed to provide
functional characteristics identical to those of the familiar
LM741 operational amplifier. In addition the total supply
current for all four amplifiers is comparable to the supply
current of a single LM741 type op amp. Other features
include input offset currents and input bias current which are
much less than those of a standard LM741. Also, excellent
isolation between amplifiers has been achieved by indepen-
dently biasing each amplifier and using layout techniques
which minimize thermal coupling.
The LM148 can be used anywhere multiple LM741 or
LM1558 type amplifiers are being used and in applications
where amplifier matching or high packing density is required.
Features
n741 op amp operating characteristics
nClass AB output stage— no crossover distortion
nPin compatible with the LM124
nOverload protection for inputs and outputs
nLow supply current drain: 0.6 mA/Amplifier
nLow input offset voltage: 1 mV
nLow input offset current: 4 nA
nLow input bias current 30 nA
nHigh degree of isolation between amplifiers: 120 dB
nGain bandwidth product (unity gain): 1.0 MHz
Ordering Information
NS PART NUMBER SMD PART NUMBER NS PACKAGE NUMBER PACKAGE DESCRIPTION
JL148BCA JM38510/11001BCA J14A 14LD CERDIP
JL148BDA JM38510/11001BDA W14B 14LD CERPACK
JL148BZA JM38510/11001BZA WG14A 14LD Ceramic SOIC
JL148SCA JM38510/11001SCA J14A 14LD CERDIP
JL148SDA JM38510/11001SDA W14B 14LD CERPACK
Connection Diagram
20122702
Top View
See NS Package Number J14A, W14B, WG14A
February 2005
LM148JAN Quad 741 Op Amp
© 2005 National Semiconductor Corporation DS201227 www.national.com
Schematic Diagram
20122701
* 1 pF in the LM149
LM148JAN
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Absolute Maximum Ratings (Note 1)
Supply Voltage ±22V
Input Voltage Range ±20V
Input Current Range −0.1mA to 10mA
Differential Input Voltage (Note 2) ±30V
Output Short Circuit Duration (Note 3) Continuous
Power Dissipation (P
d
at 25˚C) (Note 4)
CERDIP
CERPACK
400mW
350mW
Thermal Resistance
θ
JA
CERDIP (Still Air)
CERDIP (500LF/ Min Air flow)
CERPACK (Still Air)
CERPACK (500LF/ Min Air flow)
Ceramic SOIC (Still Air)
Ceramic SOIC (500LF/ Min Air flow)
103˚C/W
52˚C/W
140˚C/W
100˚C/W
176˚C/W
116˚C/W
θ
JC
CERDIP
CERPACK
Ceramic SOIC
19˚C/W
25˚C/W
25˚C/W
Package Weight (typical)
CERDIP
CERPACK
Ceramic SOIC
TBD
465mg
415mg
Maximum Junction Temperature (T
JMAX
) 175˚C
Operating Temperature Range −55˚C ≤T
A
≤+125˚C
Storage Temperature Range −65˚C ≤T
A
≤+150˚C
Lead Temperature (Soldering, 10 sec.) Ceramic 300˚C
ESD tolerance (Note 5) 500V
Quality Conformance Inspection
MIL-STD-883, Method 5005 — Group A
Subgroup Description Temp ( ˚C)
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
LM148JAN
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Electrical Characteristics
DC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.) ±V
CC
=±20V, V
CM
= 0V,
measure each amplifier.
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
V
IO
Input Offset Voltage +V
CC
= 35V, −V
CC
= −5V,
V
CM
= −15V
−5.0 +5.0 mV 1
−6.0 +6.0 mV 2, 3
+V
CC
= 5V, −V
CC
= −35V,
V
CM
= +15V
−5.0 +5.0 mV 1
−6.0 +6.0 mV 2, 3
−5.0 +5.0 mV 1
−6.0 +6.0 mV 2, 3
+V
CC
= 5V, −V
CC
= −5V, −5.0 +5.0 mV 1
−6.0 +6.0 mV 2, 3
Delta V
IO
/
Delta
T
Input Offset Voltage
Temperature Stability
25˚C ≤T
A
≤125˚C (Note 6) −25 25 µV/˚C 2
−55˚C ≤T
A
≤25˚C (Note 6) −25 25 µV/˚C 3
I
IO
Input Offset Current +V
CC
= 35V, −V
CC
= −5V,
V
CM
= −15V
−25 +25 nA 1, 2
−75 +75 nA 3
+V
CC
= 5V, −V
CC
= −35V,
V
CM
= +15V
−25 +25 nA 1, 2
−75 +75 nA 3
−25 +25 nA 1, 2
−75 +75 nA 3
+V
CC
= 5V, −V
CC
= −5V, −25 +25 nA 1, 2
−75 +75 nA 3
Delta I
IO
/
Delta
T
Input Offset Current
Temperature Stability
25˚C ≤T
A
≤125˚C (Note 6) -200 200 pA/˚C 2
−55˚C ≤T
A
≤25˚C (Note 6) –400 400 pA/˚C 3
±I
IB
Input Bias Current +V
CC
= 35V, −V
CC
= −5V,
V
CM
= −15V
−0.1 100 nA 1, 2
−0.1 325 nA 3
+V
CC
= 5V, −V
CC
= −35V,
V
CM
= +15V
−0.1 100 nA 1, 2
−0.1 325 nA 3
−0.1 100 nA 1, 2
−0.1 325 nA 3
+V
CC
= 5V, −V
CC
= −5V, −0.1 100 nA 1, 2
−0.1 325 nA 3
PSRR+ Power Supply Rejection Ratio −V
CC
= −20V, +V
CC
= 20V to 10V (Note 7) −100 100 µV/V 1, 2, 3
PSRR− Power Supply Rejection Ratio +V
CC
= 20V, −V
CC
= −20V to −10V (Note 7) −100 100 µV/V 1, 2, 3
CMRR Common Mode Rejection Ratio V
CM
=±15 V, ±5V ≤V
CC
≤±35V 76 dB 1, 2, 3
Electrical Characteristics
AC / DC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.)
±V
CC
=±20V, V
CM
= 0V, measure each amplifier.
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
+I
OS
Short Circuit Current +V
CC
= 15V, −V
CC
= −15V,
V
CM
= −10V
−55 mA 1, 2
−75 mA 3
−I
OS
Short Circuit Current +V
CC
= 15V, −V
CC
= −15V,
V
CM
= +10V
55 mA 1, 2
75 mA 3
I
CC
Power Supply Current +V
CC
= 15V, −V
CC
= −15V 3.6 mA 1
4.5 mA 2, 3
−A
VS
Open Loop Voltage Gain V
OUT
= −15V, R
L
= 10KΩ50 V/mV 4
25 V/mV 5, 6
V
OUT
= −15V, R
L
=2KΩ50 V/mV 4
25 V/mV 5, 6
LM148JAN
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Electrical Characteristics (Continued)
AC / DC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.)
±V
CC
=±20V, V
CM
= 0V, measure each amplifier.
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
+A
VS
Open Loop Voltage Gain V
OUT
= +15V, R
L
= 10KΩ50 V/mV 4
25 V/mV 5, 6
V
OUT
= +15V, R
L
=2KΩ50 V/mV 4
25 V/mV 5, 6
A
VS
Open Loop Voltage Gain V
CC
=±5V, V
OUT
=±2V, R
L
=
10KΩ
10 V/mV 4, 5, 6
V
CC
=±5V, V
OUT
=±2V, R
L
=2KΩ10 V/mV 4, 5, 6
+V
OP
Output Voltage Swing R
L
= 10KΩ+16 V 4,5,6
R
L
=2KΩ+15 V 4,5,6
-V
OP
Output Voltage Swing R
L
= 10KΩ-16 V 4,5,6
R
L
=2KΩ-15 V 4,5,6
TR
TR
Transient Response Time V
IN
= 50mV, A
V
= 1 1 µS 7, 8A, 8B
TR
OS
Transient Response Time V
IN
= 50mV, A
V
= 1 25 % 7, 8A, 8B
±SR Slew Rate V
IN
= −5V to +5V, A
V
= 1 0.2 V/µS 7, 8A, 8B
V
IN
= +5V to −5V, A
V
= 1 0.2 V/µS 7, 8A, 8B
Electrical Characteristics
AC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.) ±V
CC
=±20V, V
CM
= 0V,
measure each amplifier.
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
NI
BB
Noise (Broadband) BW = 10Hz to 5KHz 15 µV
RMS
7
NI
PC
Noise (Popcorn) R
S
= 20KΩ40 µV
PK
7
C
S
Channel Separation V
IN
=±10V,AtoB,R
L
=2KΩ80 dB 7
V
IN
=±10V,AtoC,R
L
=2KΩ80 dB 7
V
IN
=±10V,AtoD,R
L
=2KΩ80 dB 7
V
IN
=±10V,BtoA,R
L
=2KΩ80 dB 7
V
IN
=±10V,BtoC,R
L
=2KΩ80 dB 7
V
IN
=±10V,BtoD,R
L
=2KΩ80 dB 7
V
IN
=±10V,CtoA,R
L
=2KΩ80 dB 7
V
IN
=±10V,CtoB,R
L
=2KΩ80 dB 7
V
IN
=±10V,CtoD,R
L
=2KΩ80 dB 7
V
IN
=±10V,DtoA,R
L
=2KΩ80 dB 7
V
IN
=±10V,DtoB,R
L
=2KΩ80 dB 7
V
IN
=±10V,DtoC,R
L
=2KΩ80 dB 7
Electrical Characteristics
DC DRIFT PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.) ±V
CC
=±20V, V
CM
=
0V, measure each amplifier. Delta calculations performed on JAN S and QMLV devices at group B, subgroup 5 only.
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
V
IO
Input Offset Voltage −1 1 mV 1
±I
IB
Input Bias Current −15 15 nA 1
LM148JAN
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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. 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 differential input voltage range shall not exceed the supply voltage range.
Note 3: Any of the amplifier outputs can be shorted to ground indefinitely; however, more than one should not be simultaneously shorted as the maximum junction
temperature will be exceeded.
Note 4: The maximum power dissipation for these devices must be derated at elevated temperatures and is dicated by TJMAX,θJA, and the ambient temperature,
TA. The maximum available power dissipation at any temperature is Pd=(T
JMAX −T
A)/θJA or the number given in the Absolute Maximum Ratings, whichever is less.
Note 5: Human body model, 1.5 kΩin series with 100 pF.
Note 6: Calculated parameter.
Note 7: Datalogs as µV
Cross Talk Test Circuit V
S
=±15V
20122706 20122707
20122743
LM148JAN
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Typical Performance Characteristics
Supply Current Input Bias Current
20122723 20122724
Voltage Swing Positive Current Limit
20122725 20122726
Negative Current Limit Output Impedance
20122727
20122728
LM148JAN
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Typical Performance Characteristics (Continued)
Common-Mode Rejection Ratio Open Loop Frequency Response
20122729 20122730
Bode Plot LM148 Large Signal Pulse Response (LM148)
20122731 20122733
Small Signal Pulse Response (LM148) Undistorted Output Voltage Swing
20122735 20122737
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Typical Performance Characteristics (Continued)
Gain Bandwidth Slew Rate
20122738 20122739
Inverting Large Signal Pulse Response (LM148) Input Noise Voltage and Noise Current
20122741 20122742
Positive Common-Mode Input Voltage Limit Negative Common-Mode Input Voltage Limit
20122743
20122705
LM148JAN
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Application Hints
The LM148 series are quad low power LM741 op amps. In
the proliferation of quad op amps, these are the first to offer
the convenience of familiar, easy to use operating charac-
teristics of the LM741 op amp. In those applications where
LM741 op amps have been employed, the LM148 series op
amps can be employed directly with no change in circuit
performance.
The package pin-outs are such that the inverting input of
each amplifier is adjacent to its output. In addition, the
amplifier outputs are located in the corners of the package
which simplifies PC board layout and minimizes package
related capacitive coupling between amplifiers.
The input characteristics of these amplifiers allow differential
input voltages which can exceed the supply voltages. In
addition, if either of the input voltages is within the operating
common-mode range, the phase of the output remains cor-
rect. If the negative limit of the operating common-mode
range is exceeded at both inputs, the output voltage will be
positive. For input voltages which greatly exceed the maxi-
mum supply voltages, either differentially or common-mode,
resistors should be placed in series with the inputs to limit
the current.
Like the LM741, these amplifiers can easily drive a 100 pF
capacitive load throughout the entire dynamic output voltage
and current range. However, if very large capacitive loads
must be driven by a non-inverting unity gain amplifier, a
resistor should be placed between the output (and feedback
connection) and the capacitance to reduce the phase shift
resulting from the capacitive loading.
The output current of each amplifier in the package is limited.
Short circuits from an output to either ground or the power
supplies will not destroy the unit. However, if multiple output
shorts occur simultaneously, the time duration should be
short to prevent the unit from being destroyed as a result of
excessive power dissipation in the IC chip.
As with most amplifiers, care should be taken lead dress,
component placement and supply decoupling in order to
ensure stability. For example, resistors from the output to an
input should be placed with the body close to the input to
minimize “pickup” and maximize the frequency of the feed-
back pole which capacitance from the input to ground cre-
ates.
A feedback pole is created when the feedback around any
amplifier is resistive. The parallel resistance and capacitance
from the input of the device (usually the inverting input) to AC
ground set the frequency of the pole. In many instances the
frequency of this pole is much greater than the expected 3
dB frequency of the closed loop gain and consequently there
is negligible effect on stability margin. However, if the feed-
back pole is less than approximately six times the expected
3 dB frequency a lead capacitor should be placed from the
output to the input of the op amp. The value of the added
capacitor should be such that the RC time constant of this
capacitor and the resistance it parallels is greater than or
equal to the original feedback pole time constant.
Typical Applications—LM148
One Decade Low Distortion Sinewave Generator
20122708
fMAX = 5 kHz, THD ≤0.03%
R1 = 100k pot. C1 = 0.0047 µF, C2 = 0.01 µF, C3 = 0.1 µF, R2 = R6 = R7 = 1M,
R3 = 5.1k, R4 = 12Ω,R5=240Ω, Q = NS5102, D1 = 1N914, D2 = 3.6V avalanche
diode (ex. LM103), VS=±15V
A simpler version with some distortion degradation at high frequencies can be made by using A1 as a simple inverting amplifier, and by putting back to back
zeners in the feedback loop of A3.
LM148JAN
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Typical Applications—LM148 (Continued)
Low Cost Instrumentation Amplifier
20122709
VS=±15V
R = R2, trim R2 to boost CMRR
Low Drift Peak Detector with Bias Current Compensation
20122710
Adjust R for minimum drift
D3 low leakage diode
D1 added to improve speed
VS=±15V
LM148JAN
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Typical Applications—LM148 (Continued)
Universal State-Variable Filter
20122711
Tune Q through R0,
For predictable results: fOQ≤4x10
4
Use Band Pass output to tune for Q
LM148JAN
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Typical Applications—LM148 (Continued)
A 1 kHz 4 Pole Butterworth
20122712
Use general equations, and tune each section separately
Q1stSECTION = 0.541, Q2ndSECTION = 1.306
The response should have 0 dB peaking
A 3 Amplifier Bi-Quad Notch Filter
20122713
Ex: fNOTCH = 3 kHz, Q = 5, R1 = 270k, R2 = R3 = 20k, R4 = 27k, R5 = 20k, R6 = R8 = 10k, R7 = 100k, C1 = C2 = 0.001 µF
Better noise performance than the state-space approach.
LM148JAN
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Typical Applications—LM148 (Continued)
A 4th Order 1 kHz Elliptic Filter (4 Poles, 4 Zeros)
20122714
R1C1 = R2C2 = t
R'1C'1 = R'2C'2 = t'
fC= 1 kHz, fS= 2 kHz, fp= 0.543, fZ= 2.14, Q = 0.841, f' P= 0.987, f' Z= 4.92, Q' = 4.403, normalized to ripple BW
Use the BP outputs to tune Q, Q', tune the 2 sections separately
R1 = R2 = 92.6k, R3 = R4 = R5 = 100k, R6 = 10k, R0 = 107.8k, RL= 100k, RH= 155.1k,
R'1 = R'2 = 50.9k, R'4 = R'5 = 100k, R'6 = 10k, R'0 = 5.78k, R'L= 100k, R'H= 248.12k, R'f = 100k. All capacitors are 0.001 µF.
Lowpass Response
20122715
LM148JAN
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Typical Simulation
LM148, LM741 Macromodel for Computer Simulation
20122721
For more details, see IEEE Journal of Solid-State Circuits, Vol. SC-9, No. 6, December 1974
Note 8: o1 = 112IS=8x10
−16
Note 9: o2 = 144*C2=6pFforLM149
20122722
LM148JAN
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Revision History Section
Date
Released Revision Section Originator Changes
02/15/05 A New Release, Corporate format L. Lytle 1 MDS data sheet converted into one
Corp. data sheet format. MJLM148-X,
Rev. 0C1. MDS data sheet will be
archived.
LM148JAN
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Physical Dimensions inches (millimeters)
unless otherwise noted
Ceramic Dual-In-Line Package (J)
NS Package Number J14A
Ceramic Flatpack (W)
NS Package Number W14B
LM148JAN
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Ceramic SOIC (WG)
NS Package Number WG14A
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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LM148JAN Quad 741 Op Amp
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