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| LMC660EP Datasheet, PDF (7/15 Pages) National Semiconductor (TI) – CMOS Quad Operational Amplifier | |||
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Typical Performance Characteristics VS = ±7.5V, TA = 25ËC unless otherwise specified (Continued)
CMRR vs Frequency
Open-Loop Frequency
Response
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Frequency Response
vs Capacitive Load
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Non-Inverting Large Signal
Pulse Response
Stability vs
Capacitive Load
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Stability vs
Capacitive Load
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Note: Avoid resistive loads of less than 500â¦, as they may cause instability.
Application Hints
AMPLIFIER TOPOLOGY
The topology chosen for the LMC660EP, shown in Figure 1,
is unconventional (compared to general-purpose op amps)
in that the traditional unity-gain buffer output stage is not
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used; instead, the output is taken directly from the output of
the integrator, to allow rail-to-rail output swing. Since the
buffer traditionally delivers the power to the load, while main-
taining high op amp gain and stability, and must withstand
shorts to either rail, these tasks now fall to the integrator.
7
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