lmc6464amj-qml National Semiconductor Corporation, lmc6464amj-qml Datasheet - Page 15

• Manufacturer Part Number: lmc6464amj-qml
• Description: Lmc6464qml Quad Micropower, Rail-to-rail Input And Output Cmos Operational Amplifier
• Manufacturer: National Semiconductor Corporation

8.0 INSTRUMENTATION CIRCUITS
The LMC6464 has the high input impedance, large common-
mode range and high CMRR needed for designing instru-
mentation circuits. Instrumentation circuits designed with the
LMC6464 can reject a larger range of common-mode signals
than most in-amps. This makes instrumentation circuits de-
signed with the LMC6464 an excellent choice for noisy or
industrial environments. Other applications that benefit from
A two op-amp instrumentation amplifier designed for a gain
of 100 is shown in
for offset voltage, CMRR and gain. Low cost and low power
consumption are the main advantages of this two op-amp cir-
cuit.
Figure
15. Low sensitivity trimming is made
FIGURE 14. Low Power Three Op-Amp Instrumentation Amplifier
FIGURE 15. Low-Power Two-Op-Amp Instrumentation Amplifier
15
these features include analytic medical instruments, magnetic
field detectors, gas detectors, and silicon-based transducers.
A small valued potentiometer is used in series with R
the differential gain of the three op-amp instrumentation cir-
cuit in
valued potentiometer to increase gain trim accuracy and re-
duce error due to vibration.
Higher frequency and larger common-mode range applica-
tions are best facilitated by a three op-amp instrumentation
amplifier.
Figure
14. This combination is used instead of one large
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to set