LM101A/LM201A/LM301A Operational Amplifiers: Features Description
LM101A/LM201A/LM301A Operational Amplifiers: Features Description
LM101A/LM201A/LM301A Operational Amplifiers: Features Description
1FEATURES DESCRIPTION
• Improved Specifications include: The LM101A series are general purpose operational
amplifiers which feature improved performance over
• Offset Voltage 3 mV Maximum Over industry standards like the LM709. Advanced
Temperature (LM101A/LM201A) processing techniques make possible an order of
• Input Current 100 nA Maximum Over magnitude reduction in input currents, and a redesign
Temperature (LM101A/LM201A) of the biasing circuitry reduces the temperature drift
• Offset Current 20 nA Maximum Over of input current.
Temperature (LM101A/LM201A) This amplifier offers many features which make its
• Specified Drift Characteristics application nearly foolproof: Overload protection on
the input and output, no latch-up when the common
• Offsets Specified Over Entire Common Mode
mode range is exceeded, and freedom from
and Supply Voltage Ranges oscillations and compensation with a single 30 pF
• Slew Rate of 10V/μs as a Summing Amplifier 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 ensured 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.
1
Feedforward compensation can be used to make a fast full wave rectifier without a filter.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Copyright © 1999–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
LM101A-N, LM201A-N, LM301A-N
SNOSBS0D – SEPTEMBER 1999 – REVISED MARCH 2013 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
(1) 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 ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications
under particular test conditions which ensure specific limits. This assumes that the device is within the Operating Ratings. Specifications
are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) For supply voltages less than ±15V, the absolute maximum input voltage is equal to the supply voltage.
(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.
(5) Human body model, 100 pF discharged through 1.5 kΩ.
(1) Unless otherwise specified, these specifications apply for C1 = 30 pF, ±5V ≤ VS ≤ ±20V and −55°C ≤ TA ≤ +125°C (LM101A), ±5V ≤ VS
≤ ±20V and −25°C ≤ TA ≤ +85°C (LM201A), ±5V ≤ VS ≤ ±15V and 0°C ≤ TA ≤ +70°C (LM301A).
Figure 1. Figure 2.
Voltage Gain
Figure 3.
Performance Characteristics
LM301A
Input Voltage Range Output Swing
Figure 4. Figure 5.
Figure 6.
Figure 7. Figure 8.
Input Current,
Maximum Power Dissipation LM101A/LM201A/LM301A
CS= 30 pF
CS= 30 pF
C2 = 10 C1
Figure 17. Single Pole Compensation Figure 18. Two Pole Compensation
fo= 3 MHz
Figure 19. Feedforward Compensation Figure 20.
TYPICAL APPLICATIONS
L ≃ R1 R2 C1
RS = R2
RP = R1
Figure 29. Variable Capacitance Multiplier Figure 30. Simulated Inductor
Figure 32. Inverting Amplifier with Balancing *Adjust for zero integrator drift. Current drift
Circuit typically 0.1 nA/°C over −55°C to +125°C
temperature range.
Application Hints
Pin connections shown are for 8-pin packages.
*Protects input
†Protects output
‡Protects output—not needed when R4 is used.
Figure 36. Compensating for Stray Input Capacitances or Large Feedback Resistor
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 abnormal 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 devices.
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. 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 supplies for the integrated circuit never become
reversed—even under transient conditions. With reverse voltages greater than 1V, the IC will conduct excessive
current, 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. Reversal 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 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 added to isolate capacitive loads.
Although the LM101A is relatively unaffected by supply bypassing, 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 bypass the supply leads of each amplifier with low inductance capacitors because of the higher
frequencies involved.
Typical Applications
Pin connections shown are for 8-pin packages.
R3 = R4 + R5
R1 = R2
R1 = R4; R2 = R3
(1) Feedforward compensation can be used to make a fast full wave rectifier without a filter
14 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated
*Adjust for zero integrator drift. Current drift typically 0.1 nA/°C over 0°C to +70°C temperature range.
Figure 45. Voltage Comparator for Driving RTL Logic or High Current Driver
*Polycarbonate-dielectric capacitor
Figure 48. Voltage Comparator for Driving DTL or TTL Integrated Circuits
Schematic
Connection Diagrams
Top View
Top View
Top View
REVISION HISTORY
www.ti.com 12-Dec-2018
PACKAGING INFORMATION
Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples
(1) Drawing Qty (2) (6) (3) (4/5)
LM101AH ACTIVE TO-CAN LMG 8 500 TBD Call TI Call TI -55 to 125 ( LM101AH, LM101AH
)
LM101AH/NOPB ACTIVE TO-CAN LMG 8 500 Green (RoHS Call TI Level-1-NA-UNLIM -55 to 125 ( LM101AH, LM101AH
& no Sb/Br) )
LM101AJ ACTIVE CDIP NAB 8 40 TBD Call TI Call TI -55 to 125 LM101AJ
LM201AH ACTIVE TO-CAN LMG 8 500 TBD Call TI Call TI -40 to 85 ( LM201AH, LM201AH
)
LM201AH/NOPB ACTIVE TO-CAN LMG 8 500 Green (RoHS Call TI Level-1-NA-UNLIM -40 to 85 ( LM201AH, LM201AH
& no Sb/Br) )
LM301AH ACTIVE TO-CAN LMG 8 500 TBD Call TI Call TI 0 to 70 ( LM301AH, LM301AH
)
LM301AH/NOPB ACTIVE TO-CAN LMG 8 500 Green (RoHS Call TI Level-1-NA-UNLIM 0 to 70 ( LM301AH, LM301AH
& no Sb/Br) )
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com 12-Dec-2018
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
MECHANICAL DATA
NAB0008A
J08A (Rev M)
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