LM101AJ [TI]
Operational Amplifiers;
| 型号： | LM101AJ |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Operational Amplifiers 放大器 |
| 文件： | 总22页 (文件大小：646K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM101A,LM201A,LM301A
LM101A/LM201A/LM301A Operational Amplifiers
Literature Number: SNOSBS0C
August 2000
LM101A/LM201A/LM301A
Operational Amplifiers
General Description
The LM101A series are general purpose operational ampli-
fiers which feature improved performance over industry stan-
dards like the LM709. Advanced processing techniques
make possible an order of magnitude reduction in input
currents, and a redesign of the biasing circuitry reduces the
temperature drift of input current. Improved specifications
include:
and output, no latch-up when the common mode range is
exceeded, and freedom from oscillations and compensa-
tion with a single 30 pF capacitor. It has advantages over
internally compensated amplifiers in that the frequency
compensation can be tailored to the particular applica-
tion. For example, 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.
•
•
•
Offset voltage
(LM101A/LM201A)
3 mV maximum over temperature
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 integrators or timers, sample and hold circuits
and low frequency waveform generators. Further, replac-
ing 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.
Input current 100 nA maximum over temperature
(LM101A/LM201A)
Offset current 20 nA maximum over temperature
(LM101A/LM201A)
•
•
Guaranteed drift characteristics
Offsets guaranteed over entire common mode and sup-
ply voltage ranges
The LM101A is guaranteed over a temperature range of
−55˚C to +125˚C, the LM201A from −25˚C to +85˚C, and
the LM301A from 0˚C to +70˚C.
•
Slew rate of 10V/µs as a summing amplifier
This amplifier offers many features which make its appli-
cation nearly foolproof: overload protection on the input
Fast AC/DC Converter
00775233
Note 1: Feedforward compensation can be used to make a fast full wave rectifier without a filter.
© 2004 National Semiconductor Corporation
DS007752
www.national.com
Distributors for availability and specifications.
Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
LM101A/LM201A
LM301A
18V
Supply Voltage
22V
30V
Differential Input Voltage
Input Voltage (Note 3)
30V
15V
15V
Output Short Circuit Duration (Note 4)
Operating Ambient Temp. Range
Continuous
Continuous
0˚C to +70˚C
−55˚C to +125˚C (LM101A)
−25˚C to +85˚C (LM201A)
TJ Max
H-Package
150˚C
150˚C
150˚C
100˚C
100˚C
100˚C
N-Package
J-Package
Power Dissipation at TA = 25˚C
H-Package (Still Air)
(400 LF/Min Air Flow)
N-Package
500 mW
1200 mW
900 mW
300 mW
700 mW
500 mW
650 mW
J-Package
1000 mW
Thermal Resistance (Typical) θjA
H-Package (Still Air)
(400 LF/Min Air Flow)
N Package
165˚C/W
67˚C/W
165˚C/W
67˚C/W
135˚C/W
110˚C/W
135˚C/W
110˚CmW
J-Package
(Typical) θjC
H-Package
25˚C/W
25˚C/W
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
Metal Can or Ceramic
Plastic
−65˚C to +150˚C
−65˚C to +150˚C
300˚C
260˚C
2000V
300˚C
260˚C
2000V
ESD Tolerance (Note 7)
Electrical Characteristics (Note 5)
TA= TJ
Parameter
Conditions
LM101A/LM201A
LM301A
Units
Min
Typ
0.7
1.5
30
Max Min
Typ
2.0
3.0
70
Max
7.5
50
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Resistance
Supply Current
TA = 25˚C, RS ≤ 50 kΩ
TA = 25˚C
2.0
10
mV
nA
TA = 25˚C
75
250
nA
TA = 25˚C
1.5
50
4.0
1.8
0.5
3.0
2.0
MΩ
mA
mA
V/mV
TA = 25˚C
VS
VS
=
=
20V
15V
1.8
3.0
Large Signal Voltage Gain
Input Offset Voltage
TA = 25˚C, VS
=
15V
160
3.0
25
160
VOUT
=
10V, RL ≥ 2 kΩ
RS ≤ 50 kΩ
3.0
15
10
30
mV
Average Temperature Coefficient RS ≤ 50 kΩ
of Input Offset Voltage
6.0
µV/˚C
Input Offset Current
20
0.1
0.2
0.1
70
0.3
0.6
0.3
nA
nA/˚C
nA/˚C
µA
Average Temperature Coefficient 25˚C ≤ TA ≤ TMAX
0.01
0.02
0.01
0.02
of Input Offset Current
Input Bias Current
TMIN ≤ TA ≤ 25˚C
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2
Electrical Characteristics (Note 5) (Continued)
TA= TJ
Parameter
Conditions
LM101A/LM201A
LM301A
Typ Max
Units
Min
25
12
Typ
Max Min
2.5
Supply Current
TA = TMAX, VS
VS 15V, VOUT
RL ≥ 2k
=
20V
10V
1.2
mA
Large Signal Voltage Gain
Output Voltage Swing
Input Voltage Range
=
=
15
V/mV
VS
=
15V
RL = 10 kΩ
RL = 2 kΩ
14
13
12
10
14
13
V
V
10
15
VS
VS
=
=
20V
15V
V
+15, −13
12 +15, −13
V
Common-Mode Rejection Ratio
Supply Voltage Rejection Ratio
RS ≤ 50 kΩ
RS ≤ 50 kΩ
80
80
96
96
70
70
90
96
dB
dB
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Operating ratings indicate for which the device is functional, but
do no guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee
specific limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given, however, the
typical value is a good indication of device performance.
Note 3: For supply voltages less than 15V, the absolute maximum input voltage is equal to the supply voltage.
Note 4: 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 5: Unless otherwise specified, these specifications apply for C1 = 30 pF, 5V ≤ V
≤ 20V and −55˚C ≤ T ≤ +125˚C (LM101A), 5V ≤ V ≤ 20V and −25˚C
A S
S
≤ T ≤ +85˚C (LM201A), 5V ≤ V
≤
15V and 0˚C ≤ T ≤ +70˚C (LM301A).
A
S
A
Note 6: Refer to RETS101AX for LM101A military specifications and RETS101X for LM101 military specifications.
Note 7: Human body model, 100 pF discharged through 1.5 kΩ.
Typical Performance Characteristics
LM101A/LM201A
Input Voltage Range
Output Swing
00775242
00775241
3
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Typical Performance Characteristics LM101A/LM201A (Continued)
Voltage Gain
00775243
Guaranteed Performance Characteristics
LM301A
Input Voltage Range
Output Swing
00775245
00775244
Voltage Gain
00775246
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4
Typical Performance Characteristics
Supply Current
Voltage Gain
00775247
00775248
Input Current,
Maximum Power Dissipation
LM101A/LM201A/LM301A
00775249
00775250
Current Limiting
Input Noise Voltage
00775251
00775252
5
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Typical Performance Characteristics (Continued)
Input Noise Current
Common Mode Rejection
00775253
00775254
Closed Loop Output
Impedance
Power Supply Rejection
00775255
00775256
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6
Typical Performance Characteristics for Various Compensation Circuits
(Note 9)
Single Pole Compensation
Two Pole Compensation
00775208
00775212
C = 30 pF
S
C = 30 pF
S
C2 = 10 C1
Open Loop Frequency
Response
Feedforward Compensation
00775216
00775209
f = 3 MHz
o
Open Loop Frequency
Response
Open Loop Frequency
Response
00775217
00775213
7
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Typical Performance Characteristics for Various Compensation Circuits
(Note 9) (Continued)
Large Signal Frequency
Response
Large Signal Frequency
Response
00775210
00775218
00775215
00775214
00775211
00775219
Large Signal Frequency
Response
Voltage Follower Pulse
Response
Voltage Follower Pulse
Response
Inverter Pulse Response
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8
Typical Applications (Note 9)
Inverting Amplifier
with Balancing Circuit
Variable Capacitance Multiplier
00775220
00775223
†
May be zero or equal to parallel combination of R1 and R2 for minimum
offset.
Simulated Inductor
Sine Wave Oscillator
00775221
L . R1 R2 C1
R
R
= R2
= R1
S
P
Fast Inverting Amplifier
with High Input Impedance
00775224
f
o
= 10 kHz
Integrator with Bias Current Compensation
00775222
00775225
*Adjust for zero integrator drift. Current drift typically 0.1 nA/˚C over −55˚C
to +125˚C temperature range.
9
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Application Hints (Note 9)
Protecting Against Gross
Fault Conditions
00775226
*Protects input
†
‡
Protects output
Protects output — not needed when R4 is used.
Compensating for Stray Input Capacitances
or Large Feedback Resistor
00775227
Isolating Large Capacitive Loads
00775228
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
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10
advice given here is applicable to practically any IC op amp,
although the exact reason why may differ with different de-
vices.
Typical Applications (Note 9)
Standard Compensation and
Offset Balancing Circuit
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 µF) 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 voltage. How-
ever, 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.
00775229
Fast Voltage Follower
Precautions should be taken to insure that the power sup-
plies for the integrated circuit never become
reversed—even under transient conditions. With reverse
voltages greater than 1V, the IC will conduct excessive cur-
rent, fusing 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. Rever-
sal of the voltage between V+ and V− will always cause a
problem, 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 kΩ, 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 over-
compensate the amplifier with a larger compensation capaci-
tor. 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 added to isolate
capacitive loads.
00775231
Power Bandwidth: 15 kHz
Slew Rate: 1V/µs
Fast Summing Amplifier
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.
00775230
Power Bandwidth: 250 kHz
Small Signal Bandwiidth: 3.5 MHz
Slew Rate: 10V/µs
11
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Typical Applications (Note 9) (Continued)
Bilateral Current Source
00775232
R3 = R4 + R5
R1 = R2
Fast AC/DC Converter (Note 8)
00775233
Note 8: Feedforward compensation can be used to make a fast full wave rectifier without a filter.
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12
Typical Applications (Note 9) (Continued)
Instrumentation Amplifier
00775234
R1 = R4; R2 = R3
†
*, Matching determines CMRR.
Voltage Comparator for Driving RTL Logic or High
Current Driver
Integrator with Bias Current Compensation
00775237
00775235
*Adjust for zero integrator drift. Current drift typically 0.1 nA/˚C over 0˚C to
+70˚C temperature range.
13
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Typical Applications (Note 9) (Continued)
Low Frequency Square Wave Generator
00775236
Voltage Comparator for Driving
DTL or TTL Integrated Circuits
Low Drift Sample and Hold
00775239
00775238
*Polycarbonate-dielectric capacitor
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14
Schematic (Note 9)
00775201
Note 9: Pin connections shown are for 8-pin packages.
Connection Diagrams
(Top View)
Ceramic Flatpack Package
Dual-In-Line Package
00775240
Order Number LM101AW/883 or LM101W/883
See NS Package Number W10A
00775204
Order Number LM101AJ, LM101J/883 (Note 10),
LM201AN or LM301AN
See NS Package Number J08A or N08E
15
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Connection Diagrams (Top
Dual-In-Line Package
View) (Continued)
Metal Can Package
00775203
Order Number LM101AJ-14/883 (Note 10)
See NS Package Number J14A
00775202
Note: Pin 4 connected to case.
Order Number LM101AH, LM101AH/883 (Note 10),
LM201AH or LM301AH
See NS Package Number H08C
Note 10: Available per JM38510/10103.
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16
Physical Dimensions inches (millimeters)
unless otherwise noted
Metal Can Package (H)
Order Number LM101AH, LM101AH/883
LM201AH or LM301AH
NS Package Number H08C
17
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Ceramic Dual-In-Line Package (J)
Order Number LM101J/883 or LM101AJ
NS Package Number J08A
Ceramic Dual-In-Line Package (J)
Order Number LM101AJ-14/883
NS Package Number J14A
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18
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Molded Dual-In-Line Package (N)
Order Number LM201AN or LM301AN
NS Package Number N08E
Ceramic Flatpack Package (W)
Order Number LM101AW/883 or LM101W/883
NS Package Number W10A
19
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Notes
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