LMC6464AMWG-QML NSC [National Semiconductor], LMC6464AMWG-QML Datasheet - Page 13

• Manufacturer Part Number: LMC6464AMWG-QML
• Description: Micropower, Rail-to-Rail Input and Output CMOS Operational Amplifier
• Manufacturer: NSC [National Semiconductor]

Application Information
8.0 Instrumentation Circuits
The LMC6464 has the high input impedance, large
common-mode range and high CMRR needed for designing
instrumentation circuits. Instrumentation circuits designed
with
common-mode signals than most in-amps. This makes in-
strumentation circuits designed with the LMC6464 an excel-
lent choice for noisy or industrial environments. Other appli-
A two op-amp instrumentation amplifier designed for a gain
of 100 is shown in Figure 15 . Low sensitivity trimming is
made for offset voltage, CMRR and gain. Low cost and low
power consumption are the main advantages of this two
op-amp circuit.
the
LMC6464
can
FIGURE 14. Low Power Three Op-Amp Instrumentation Amplifier
FIGURE 15. Low-Power Two-Op-Amp Instrumentation Amplifier
reject
a
(Continued)
larger
range
of
13
cations that benefit from these features include analytic
medical instruments, magnetic field detectors, gas detectors,
and silicon-based transducers.
A small valued potentiometer is used in series with Rg to set
the differential gain of the three op-amp instrumentation cir-
cuit in Figure 14 . This combination is used instead of one
large valued potentiometer to increase gain trim accuracy
and reduce error due to vibration.
Higher frequency and larger common-mode range applica-
tions are best facilitated by a three op-amp instrumentation
amplifier.
DS012051-20
DS012051-21
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