The LM101A series are general purpose operational amplifiers which feature improved performance over industry standards 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.Improvedspecifications include:
Offset voltage 3 mV maximum over temperature
•
(LM101A/LM201A)
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
Slew rate of 10V/µs as a summing amplifier
•
This amplifier offers many features which make its application nearly foolproof: overload protection on the input
LM101A/LM201A/LM301A Operational Amplifiers
September 1999
and output, no latch-up when the common mode range is
exceeded, and freedom from oscillations and compensation with a single 30 pF capacitor. It has advantages over
internally compensated amplifiers in that the frequency
compensation can be tailored to the particular application. 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.
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, 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
−55˚C to +125˚C, the LM201A from −25˚C to +85˚C, and
the LM301A from 0˚C to +70˚C.
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
LM101A/LM201ALM301A
Supply Voltage
Differential Input Voltage
Input Voltage (Note 3)
±
22V
±
30V
±
15V
Output Short Circuit Duration (Note 4)ContinuousContinuous
Operating Ambient Temp. Range−55˚C to +125˚C (LM101A)0˚C to +70˚C
Input Offset VoltageR
Average Temperature Coefficient R
=
25˚C, R
A
=
25˚C1.5103.050nA
A
=
25˚C307570250nA
A
=
25˚C1.54.00.52.0MΩ
A
=
25˚CV
A
=
25˚C, V
A
V
OUT
≤ 50 kΩ3.010mV
S
≤ 50 kΩ3.0156.030µV/˚C
S
of Input Offset Voltage
Input Offset Current2070nA
Average Temperature Coefficient 25˚C ≤ T
of Input Offset CurrentT
≤ TA≤ 25˚C0.020.20.020.6nA/˚C
MIN
Input Bias Current0.10.3µA
Supply CurrentT
=
T
A
≤ 50 kΩ0.72.02.07.5mV
S
=
±
20V1.83.0mA
S
=
±
V
15V1.83.0mA
=
S
=
±
10V, RL≥ 2kΩ
≤ T
A
MAX
=
MAX,VS
S
±
15V5016025160V/mV
0.010.10.010.3nA/˚C
±
20V1.22.5mA
www.national.com3
Electrical Characteristics (Note 5) (Continued)
=
T
T
A
J
ParameterConditionsLM101A/LM201ALM301AUnits
MinTypMax MinTypMax
=
±
Large Signal Voltage GainV
Output Voltage SwingV
Input Voltage RangeV
Common-Mode Rejection RatioR
Supply Voltage Rejection RatioR
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,thetypical
value is a good indication of device performance.
Note 3: For supply voltages less than
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,
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.
±
15V, V
S
R
≥ 2k
L
=
±
15VR
S
=
±
20V
S
=
±
V
15V+15,
S
≤ 50 kΩ80967090dB
S
≤ 50 kΩ80967096dB
S
15V, the absolute maximum input voltage is equal to the supply voltage.
=
±
10V2515V/mV
OUT
=
10 kΩ
L
=
R
2kΩ
L
±
5V ≤ VS≤±20V and −55˚C ≤ TA≤ +125˚C (LM101A),±5V ≤ VS≤±20V and −25˚C