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TL/H/7752
LM101A/LM201A/LM301A
Operational
Amplifiers
December 1994
LM101A/LM201A/LM301A Operational Amplifiers
General Description
The LM101A series are general purpose operational amplifi-
ers which feature improved performance over industry stan-
dards like the LM709. Advanced processing techniques
make possible an order of magnitude reduction in input cur-
rents, and a redesign of the biasing circuitry reduces the
temperature drift of input current. Improved specifications
include:
Y
Offset voltage 3 mV maximum over
temperature (LM101A/LM201A)
Y
Input current 100 nA maximum over
temperature (LM101A/LM201A)
Y
Offset current 20 nA maximum over
temperature (LM101A/LM201A)
Y
Guaranteed drift characteristics
Y
Offsets guaranteed over entire common mode and sup-
ply voltage ranges
Y
Slew rate of 10V/ms as a summing amplifier
This amplifier offers many features which make its applica-
tion nearly foolproof: overload protection on the input and
output, no latch-up when the common mode range is ex-
ceeded, and freedom from oscillations and compensation
with a single 30 pF capacitor. It has advantages over inter-
nally compensated amplifiers in that the frequency compen-
sation can be tailored to the particular application. For ex-
ample, in low frequency circuits it can be overcompensated
for increased stability margin. Or the compensation can be
optimized to give more than a factor of ten improvement in
high frequency performance for most applications.
In addition, the device provides better accuracy and lower
noise in high impedance circuitry. The low input currents
also make it particularly well suited for long interval integra-
tors or timers, sample and hold circuits and low frequency
waveform generators. Further, replacing circuits where
matched transistor pairs buffer the inputs of conventional IC
op amps, it can give lower offset voltage and a drift at a
lower cost.
The LM101A is guaranteed over a temperature range of
b
55
C to
a
125
C, the LM201A from
b
25
C to
a
85
C,
and the LM301A from 0
C to
a
70
C.
Connection Diagrams
(Top View)
Dual-In-Line Package
TL/H/7752 - 4
Order Number LM101AJ, LM101J/883
*,
LM201AN or LM301AN
See NS Package Number J08A or N08A
Ceramic Flatpack Package
TL/H/7752 - 4
Order Number LM101AW/883 or LM101W/883
See NS Package Number W10A
Metal Can Package
TL/H/7752 - 2
Note:
Pin 4 connected to case.
Order Number LM101AH,
LM101AH/883
*, LM201AH or LM301AH
See NS Package Number H08C
Dual-In-Line Package
TL/H/7752 - 3
Order Number LM101AJ-14/883
*
See NS Package Number J14A
*Available per JM38510/10103.
C1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
Absolute Maximum Ratings
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM101A/LM201A
LM301A
Supply Voltage
g
22V
g
18V
Differential Input Voltage
g
30V
g
30V
Input Voltage (Note 1)
g
15V
g
15V
Output Short Circuit Duration (Note 2)
Continuous
Continuous
Operating Ambient Temp. Range
b
55
C to
a
125
C (LM101A)
0
C to
a
70
C
b
25
C to
a
85
C (LM201A)
T
J
Max
H-Package
150
C
100
C
N-Package
150
C
100
C
J-Package
150
C
100
C
Power Dissipation at T
A
e
25
C
H-Package (Still Air)
500 mW
300 mW
(400 LF/Min Air Flow)
1200 mW
700 mW
N-Package
900 mW
500 mW
J-Package
1000 mW
650 mW
Thermal Resistance (Typical) i
jA
H-Package (Still Air)
165
C/W
165
C/W
(400 LF/Min Air Flow)
67
C/W
67
C/W
N Package
135
C/W
135
C/W
J-Package
110
C/W
110
CmW
(Typical) i
jC
H-Package
25
C/W
25
C/W
Storage Temperature Range
b
65
C to
a
150
C
b
65
C to
a
150
C
Lead Temperature (Soldering, 10 sec.)
Metal Can or Ceramic
300
C
300
C
Plastic
260
C
260
C
ESD Tolerance (Note 5)
2000V
2000V
Electrical Characteristics
(Note 3) T
A
e
T
J
Parameter
Conditions
LM101A/LM201A
LM301A
Units
Min
Typ
Max Min
Typ
Max
Input Offset Voltage
T
A
e
25
C, R
S
s
50 kX
0.7
2.0
2.0
7.5
mV
Input Offset Current
T
A
e
25
C
1.5
10
3.0
50
nA
Input Bias Current
T
A
e
25
C
30
75
70
250
nA
Input Resistance
T
A
e
25
C
1.5
4.0
0.5
2.0
MX
Supply Current
T
A
e
25
C
V
S
e
g
20V
1.8
3.0
mA
V
S
e
g
15V
1.8
3.0
mA
Large Signal Voltage Gain
T
A
e
25
C, V
S
e
g
15V
50
160
25
160
V/mV
V
OUT
e
g
10V, R
L
t
2 kX
Input Offset Voltage
R
S
s
50 kX
3.0
10
mV
Average Temperature Coefficient R
S
s
50 kX
3.0
15
6.0
30
m
V/
C
of Input Offset Voltage
Input Offset Current
20
70
nA
Average Temperature Coefficient 25
C
s
T
A
s
T
MAX
0.01
0.1
0.01
0.3
nA/
C
of Input Offset Current
T
MIN
s
T
A
s
25
C
0.02
0.2
0.02
0.6
nA/
C
2
Electrical Characteristics
(Note 3) T
A
e
T
J
(Continued)
Parameter
Conditions
LM101A/LM201A
LM301A
Units
Min
Typ
Max Min
Typ
Max
Input Bias Current
0.1
0.3
m
A
Supply Current
T
A
e
T
MAX
, V
S
e
g
20V
1.2
2.5
mA
Large Signal Voltage Gain
V
S
e
g
15V, V
OUT
e
g
10V
25
15
V/mV
R
L
t
2k
Output Voltage Swing
V
S
e
g
15V
R
L
e
10 kX
g
12
g
14
g
12
g
14
V
R
L
e
2 kX
g
10
g
13
g
10
g
13
V
Input Voltage Range
V
S
e
g
20V
g
15
V
V
S
e
g
15V
a
15,
b
13
g
12
a
15,
b
13
V
Common-Mode Rejection Ratio R
S
s
50 kX
80
96
70
90
dB
Supply Voltage Rejection Ratio R
S
s
50 kX
80
96
70
96
dB
Note 1:
For supply voltages less than
g
15V, the absolute maximum input voltage is equal to the supply voltage.
Note 2:
Continuous short circuit is allowed for case temperatures to 125
C and ambient temperatures to 75
C for LM101A/LM201A, and 70
C and 55
C
respectively for LM301A.
Note 3:
Unless otherwise specified, these specifications apply for C1
e
30 pF,
g
5V
s
V
S
s g
20V and
b
55
C
s
T
A
s a
125
C (LM101A),
g
5V
s
V
S
s g
20V
and
b
25
C
s
T
A
s a
85
C (LM201A),
g
5V
s
V
S
s g
15V and 0
C
s
T
A
s a
70
C (LM301A).
Note 4:
Refer to RETS101AX for LM101A military specifications and RETS101X for LM101 military specifications.
Note 5:
Human body model, 100 pF discharged through 1.5 kX.
Guaranteed Performance Characteristics
LM101A/LM201A
Input Voltage Range
Output Swing
Voltage Gain
TL/H/7752 - 5
Guaranteed Performance Characteristics
LM301A
Input Voltage Range
Output Swing
Voltage Gain
TL/H/7752 - 6
3
Typical Performance Characteristics
Supply Current
Voltage Gain
Maximum Power Dissipation
LM101A/LM201A/LM301A
Input Current,
Current Limiting
Input Noise Voltage
Input Noise Current
Common Mode Rejection
Power Supply Rejection
Impedance
Closed Loop Output
TL/H/7752 - 7
4
Typical Performance Characteristics for Various Compensation Circuits
**
Single Pole Compensation
TL/H/7752 - 8
C1
t
R1 C
S
R1
a
R2
C
S
e
30 pF
Two Pole Compensation
C1
t
R1 C
S
R1
a
R2
C
S
e
30 pF
C2
e
10 C1
TL/H/7752 - 12
Feedforward Compensation
C2
e
1
2q f
o
R2
f
o
e
3 MHz
TL/H/7752 - 16
Response
Open Loop Frequency
TL/H/7752 - 9
Response
Open Loop Frequency
TL/H/7752 - 13
Response
Open Loop Frequency
TL/H/7752 - 17
Response
Large Signal Frequency
TL/H/7752 - 10
Response
Large Signal Frequency
TL/H/7752 - 14
Response
Large Signal Frequency
TL/H/7752 - 18
Response
Voltage Follower Pulse
TL/H/7752 - 11
Response
Voltage Follower Pulse
TL/H/7752 - 15
Inverter Pulse Response
TL/H/7752 - 19
**Pin connections shown are for 8-pin packages.
5
Typical Applications
**
Variable Capacitance Multiplier
C
e
1
a
R
b
R
a
C1
TL/H/7752 - 20
Simulated Inductor
L j R1 R2 C1
R
S
e
R2
R
P
e
R1
TL/H/7752 - 21
Fast Inverting Amplifier
with High Input Impedance
TL/H/7752 - 22
Inverting Amplifier
with Balancing Circuit
May be zero or equal
to parallel combina-
tion of R1 and R2 for
minimum offset.
TL/H/7752 - 23
Integrator with Bias Current
Sine Wave Oscillator
Compensation
TL/H/7752 - 25
*Adjust for zero integrator drift. Current drift typically
0.1 nA/
C over
b
55
C to
a
125
C temperature range.
f
o
e
10 kHz
TL/H/7752 - 24
**Pin connections shown are for 8-pin packages.
6
Application Hints
**
Protecting Against Gross
Fault Conditions
*Protects input
Protects output
TL/H/7752 - 26
Protects outputÐnot needed when R4 is used.
Compensating for Stray Input Capacitances
or Large Feedback Resistor
C2
e
R1 C
S
R2
TL/H/7752 - 27
Isolating Large Capacitive Loads
TL/H/7752 - 28
Although the LM101A is designed for trouble free operation,
experience has indicated that it is wise to observe certain
precautions given below to protect the devices from abnor-
mal operating conditions. It might be pointed out that the
advice given here is applicable to practically any IC op amp,
although the exact reason why may differ with different de-
vices.
When driving either input from a low-impedance source, a
limiting resistor should be placed in series with the input
lead to limit the peak instantaneous output current of the
source to something less than 100 mA. This is especially
important when the inputs go outside a piece of equipment
where they could accidentally be connected to high voltage
sources. Large capacitors on the input (greater than 0.1 mF)
should be treated as a low source impedance and isolated
with a resistor. Low impedance sources do not cause a
problem unless their output voltage exceeds the supply volt-
age. However, the supplies go to zero when they are turned
off, so the isolation is usually needed.
The output circuitry is protected against damage from shorts
to ground. However, when the amplifier output is connected
to a test point, it should be isolated by a limiting resistor, as
test points frequently get shorted to bad places. Further,
when the amplifer drives a load external to the equipment, it
is also advisable to use some sort of limiting resistance to
preclude mishaps.
Precautions should be taken to insure that the power sup-
plies for the integrated circuit never become reversedÐ
even under transient conditions. With reverse voltages
greater than 1V, the IC will conduct excessive current, fus-
ing internal aluminum interconnects. If there is a possibility
of this happening, clamp diodes with a high peak current
rating should be installed on the supply lines. Reversal of
the voltage between V
a
and V
b
will always cause a prob-
lem, although reversals with respect to ground may also
give difficulties in many circuits.
The minimum values given for the frequency compensation
capacitor are stable only for source resistances less than
10 kX, stray capacitances on the summing junction less
than 5 pF and capacitive loads smaller than 100 pF. If any
of these conditions are not met, it becomes necessary to
overcompensate the amplifier with a larger compensation
capacitor. Alternately, lead capacitors can be used in the
feedback network to negate the effect of stray capacitance
and large feedback resistors or an RC network can be add-
ed to isolate capacitive loads.
Although the LM101A is relatively unaffected by supply by-
passing, this cannot be ignored altogether. Generally it is
necessary to bypass the supplies to ground at least once on
every circuit card, and more bypass points may be required
if more than five amplifiers are used. When feed-forward
compensation is employed, however, it is advisable to by-
pass the supply leads of each amplifier with low inductance
capacitors because of the higher frequencies involved.
**Pin connections shown are for 8-pin packages.
7
Typical Applications
**
(Continued)
Standard Compensation and
Offset Balancing Circuit
TL/H/7752 - 29
Fast Summing Amplifier
Power Bandwidth: 250 kHz
Small Signal Bandwiidth: 3.5 MHz
Slew Rate: 10V/ms
TL/H/7752 - 30
Fast Voltage Follower
Power Bandwidth: 15 kHz
Slew Rate: 1V/ms
TL/H/7752 - 31
Bilateral Current Source
I
OUT
e
R3 V
IN
R1 R5
R3
e
R4
a
R5
R1
e
R2
TL/H/7752 - 32
Fast AC/DC Converter
*
*Feedforward
compensation
can be used to make a fast full
wave rectifier without a filter.
TL/H/7752 - 33
**Pin connections shown are for 8-pin packages.
8
Typical Applications
**
(Continued)
Instrumentation Amplifier
R1
e
R4; R2
e
R3
A
V
e
1
a
R1
R2
*,
Matching determines CMRR.
TL/H/7752 - 34
Integrator with Bias Current Compensation
*Adjust for zero integrator
drift. Current drift typically
0.1 nA/
C over 0
C to
a
70
C
temperature range.
TL/H/7752 - 35
Voltage Comparator for Driving RTL Logic or
High Current Driver
TL/H/7752 - 37
Low Frequency Square Wave Generator
TL/H/7752 - 36
**Pin connections shown are for 8-pin packages.
9
Typical Applications
**
(Continued)
Low Drift Sample and Hold
*Polycarbonate-dielectric capacitor
TL/H/7752 - 38
Voltage Comparator for Driving
DTL or TTL Integrated Circuits
TL/H/7752 - 39
Schematic
**
TL/H/7752 - 1
**Pin connections shown are for 8-pin packages.
10
11
Physical Dimensions
inches (millimeters)
Metal Can Package (H)
Order Number LM101AH, LM101AH/883
LM201AH or LM301AH
NS Package Number H08C
Ceramic Dual-In-Line Package (J)
Order Number LM101J/883 or LM101AJ
NS Package Number J08A
12
Physical Dimensions
inches (millimeters) (Continued)
Ceramic Dual-In-Line Package (J)
Order Number LM101AJ-14/883
NS Package Number J14A
Molded Dual-In-Line Package (N)
Order Number LM201AN or LM301AN
NS Package Number N08E
13
LM101A/LM201A/LM301A
Operational
Amplifiers
Physical Dimensions
inches (millimeters) (Continued)
Ceramic Flatpack Package (W)
Order Number LM101AW/883 or LM101W/883
NS Package Number W10A
LIFE SUPPORT POLICY
NATIONALS 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
2. A critical component is any component of a life
systems which, (a) are intended for surgical implant
support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose
be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance
support device or system, or to affect its safety or
with instructions for use provided in the labeling, can
effectiveness.
be reasonably expected to result in a significant injury
to the user.
National Semiconductor
National Semiconductor
National Semiconductor
National Semiconductor
Corporation
Europe
Hong Kong Ltd.
Japan Ltd.
1111 West Bardin Road
Fax: (a49) 0-180-530 85 86
13th Floor, Straight Block,
Tel: 81-043-299-2309
Arlington, TX 76017
Email: cnjwge
@
tevm2.nsc.com
Ocean Centre, 5 Canton Rd.
Fax: 81-043-299-2408
Tel: 1(800) 272-9959
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English
Tel: (a49) 0-180-532 78 32
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Tel: (852) 2737-1600
Italiano
Tel: (a49) 0-180-534 16 80
Fax: (852) 2736-9960
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.
