NSC LM148E/883 Quad 741 op amp Datasheet

LM148QML
Quad 741 Op Amps
General Description
Features
The LM148 is a true quad LM741. It consists of four independent, high gain, internally compensated, low power operational 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 independently biasing each amplifier and using layout techniques
which minimize thermal coupling.
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741 op amp operating characteristics
Class AB output stage — no crossover distortion
Pin compatible with the LM124
Overload protection for inputs and outputs
Low supply current drain:
0.6 mA/Amplifier
Low input offset voltage:
1 mV
Low input offset current:
4 nA
Low input bias current
30 nA
High degree of isolation between amplifiers:
120 dB
Gain bandwidth product (unity gain):
1.0 MHz
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.
Ordering Information
NS PART NUMBER
SMD PART NUMBER
NS PACKAGE NUMBER
PACKAGE DESCRIPTION
LM148E/883
E20A
20LD LEADLESS CHIP CARRIER
LM148J/883
J14A
14LD CERDIP
Connection Diagrams
20120502
Top View
See NS Package Number J14A
© 2005 National Semiconductor Corporation
DS201205
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LM148QML Quad 741 Op Amp
February 2005
LM148QML
Connection Diagrams
(Continued)
20120548
Top View
See NS Package Number E20A
Schematic Diagram
20120501
* 1 pF in the LM149
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LM148QML
Absolute Maximum Ratings (Note 1)
± 22V
± 44V
Supply Voltage
Differential Input Voltage
Output Short Circuit Duration(Note 2)
Continuous
Power Dissipation (Pd at 25˚C) (Note 3)
1100mW
Thermal Resistance
θJA
CERDIP (Still Air)
CERDIP (500LF/ Min Air flow)
LCC (Still Air)
LCC (500LF/ Min Air flow)
103˚C/W
52˚C/W
90˚C/W
66˚C/W
θJC
CERDIP
LCC
19˚C/W
21˚C/W
Maximum Junction Temperature (TjMAX)
150˚C
Operating Temperature Range
−55˚C ≤ TA ≤ +125˚C
Storage Temperature Range
−65˚C ≤ TA ≤ +150˚C
Lead Temperature (Soldering, 10 sec.) Ceramic
300˚C
ESD tolerance (Note 4)
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
Electrical Characteristics
DC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.) VCC = ± 15V, RS = 0Ω
Symbol
Parameter
Conditions
Notes
Units
Subgroups
+5
mV
1
2,3
Min Max
VIO
Input Offset Voltage
VCM = 0V, RS = 50 Ω
−5
−6
+6
mV
IIO
Input Offset Current
VCM = 0V
−25
+25
nA
1
−75
+75
nA
2,3
1
100
nA
1
1
325
nA
2,3
± IIB
Rin
Input Bias Current
VCM = 0V
0.8
MΩ
1
PSRR+
Power Supply Rejection Ratio
Input Resistance
+VCC = +15V and +5V, −VCC =
−15V, RS = 50Ω
(Note 5)
77
dB
1, 2, 3
PSRR−
Power Supply Rejection Ratio
+VCC = +15V, −VCC = −15V and
−5V, RS = 50Ω
77
dB
1, 2, 3
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LM148QML
Electrical Characteristics
(Continued)
DC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.) VCC = ± 15V, RS = 0Ω
Symbol
Parameter
Conditions
Notes
Min Max
Units
Subgroups
Common Mode Rejection Ratio +VCM = ± 12V, RS = 50Ω
70
dB
1, 2, 3
IOS+
Short Circuit Current
−55
−14
mA
1
IOS−
Short Circuit Current
14
55
mA
1
ICC
Power Supply Current
0.4
3.6
mA
1
0.4
4.5
mA
2, 3
50
V/mV
4
25
V/mV
5, 6
50
V/mV
4
25
V/mV
5, 6
RL = 10 kΩ
+12
V
4, 5, 6
RL = 2kΩ
+10
V
4, 5, 6
CMRR
AVS+
Large Signal Voltage Gain
VOUT = 0V to +10V, RL > 2 kΩ
AVS−
Large Signal Voltage Gain
VOUT = 0V to −10V, RL > 2 kΩ
Vout+
Vout−
Output Voltage Swing
Output Voltage Swing
RL = 10 kΩ
−12
V
4, 5, 6
RL = 2kΩ
−10
V
4, 5, 6
Electrical Characteristics
AC PARAMETERS (The following conditions apply to all parameters, unless otherwise specified.) VCC = ± 15V, AV = 1, RS =
0Ω
Symbol
Parameter
Conditions
Notes
Min Max
Units
Subgroups
V/µs
7, 8A, 8B
MHz
7, 8A, 8B
± SR
Slew Rate
0.2
GBW
Gain Bandwidth Product
0.4
1.4
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: 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 3: 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 = (TJMAX − TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is less.
Note 4: Human body model, 1.5 kΩ in series with 100 pF
Note 5: Parameter Guaranteed, Not Tested.
Cross Talk Test Circuit
VS = ± 15V
20120506
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20120507
4
LM148QML
Cross Talk Test Circuit VS =
± 15V (Continued)
20120543
5
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LM148QML
Typical Performance Characteristics
Supply Current
Input Bias Current
20120523
20120524
Voltage Swing
Positive Current Limit
20120525
20120526
Negative Current Limit
Output Impedance
20120528
20120527
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LM148QML
Typical Performance Characteristics
(Continued)
Common-Mode Rejection Ratio
Open Loop Frequency Response
20120529
20120530
Bode Plot LM148
Large Signal Pulse Response (LM148)
20120533
20120531
Small Signal Pulse Response (LM148)
Undistorted Output Voltage Swing
20120535
20120537
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LM148QML
Typical Performance Characteristics
(Continued)
Gain Bandwidth
Slew Rate
20120538
20120539
Inverting Large Signal Pulse Response (LM148)
Input Noise Voltage and Noise Current
20120541
20120542
Positive Common-Mode Input Voltage Limit
Negative Common-Mode Input Voltage Limit
20120505
20120543
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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 characteristics 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.
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 feedback pole which capacitance from the input to ground creates.
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 correct. 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 maximum supply voltages, either differentially or common-mode,
resistors should be placed in series with the inputs to limit
the current.
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 feedback 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.
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
Typical Applications—LM148
One Decade Low Distortion Sinewave Generator
20120508
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.
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LM148QML
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.
Application Hints
LM148QML
Typical Applications—LM148
(Continued)
Low Cost Instrumentation Amplifier
20120509
VS = ± 15V
R = R2, trim R2 to boost CMRR
Low Drift Peak Detector with Bias Current Compensation
20120510
Adjust R for minimum drift
D3 low leakage diode
D1 added to improve speed
VS = ± 15V
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LM148QML
Typical Applications—LM148
(Continued)
Universal State-Variable Filter
20120511
Tune Q through R0,
For predictable results: fO Q ≤ 4 x 104
Use Band Pass output to tune for Q
11
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LM148QML
Typical Applications—LM148
(Continued)
A 1 kHz 4 Pole Butterworth
20120512
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
20120513
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.
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LM148QML
Typical Applications—LM148
(Continued)
A 4th Order 1 kHz Elliptic Filter (4 Poles, 4 Zeros)
20120514
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
20120515
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LM148QML
Typical Simulation
LM148, LM741 Macromodel for Computer Simulation
20120521
For more details, see IEEE Journal of Solid-State Circuits, Vol. SC-9, No. 6, December 1974
Note 6: o1 = 112IS = 8 x 10−16
Note 7: o2 = 144*C2 = 6 pF for LM149
20120522
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LM148QML
Revision History Section
Date
Released
02/08/05
Revision
A
Section
Originator
Changes
New Release, Corporate format
L. Lytle
1 MDS data sheet converted into one
Corp. data sheet format. MNLM148-X,
Rev. 2A2. MDS data sheet will be
archived.
15
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LM148QML
Physical Dimensions
inches (millimeters)
unless otherwise noted
Ceramic Dual-In-Line Package (J)
NS Package Number J14A
Leadless Chip Carrier(E)
NS Package Number E20A
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LM148QML Quad 741 Op Amp
Notes
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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