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LM101A Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer LM101A
Beschreibung Operational Amplifiers
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 17 Seiten
LM101A Datasheet, Funktion
September 1999
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 in-
clude:
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 appli-
cation nearly foolproof: overload protection on the input
Connection Diagrams (Top View)
Dual-In-Line Package
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 over-
compensated for increased stability margin. Or the com-
pensation 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 inte-
grators or timers, sample and hold circuits and low fre-
quency waveform generators. Further, replacing circuits
where matched transistor pairs buffer the inputs of con-
ventional 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.
Ceramic Flatpack Package
DS007752-4
Order Number LM101AJ, LM101J/883 (Note 1),
LM201AN or LM301AN
See NS Package Number J08A or N08E
DS007752-40
Order Number LM101AW/883 or LM101W/883
See NS Package Number W10A
© 1999 National Semiconductor Corporation DS007752
www.national.com






LM101A Datasheet, Funktion
Typical Performance Characteristics (Continued)
Closed Loop Output
Impedance
DS007752-56
Typical Performance Characteristics for Various Compensation Circuits
(Note 9)
Single Pole Compensation
Two Pole Compensation
CS= 30 pF
DS007752-8
CS= 30 pF
C2 = 10 C1
Feedforward Compensation
DS007752-12
fo= 3 MHz
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DS007752-16
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LM101A pdf, datenblatt
Typical Applications (Note 9) (Continued)
Instrumentation Amplifier
R1 = R4; R2 = R3
*,Matching determines CMRR.
Integrator with Bias Current Compensation
DS007752-34
Voltage Comparator for Driving RTL Logic or High
Current Driver
DS007752-35
*Adjust for zero integrator drift. Current drift typically 0.1 nA/˚C over 0˚C to
+70˚C temperature range.
DS007752-37
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