Operational Amplifiers
General Description
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. Improved specifications 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 supply
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
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.
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