LMC6484MN NSC [National Semiconductor], LMC6484MN Datasheet - Page 16

• Manufacturer Part Number: LMC6484MN
• Description: CMOS Quad Rail-to-Rail Input and Output Operational Amplifier
• Manufacturer: NSC [National Semiconductor]

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Application Information
10.0 Instrumentation Circuits
The LMC6484 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 LMC6484 an excel-
lent choice for noisy or industrial environments. Other appli-
A 2 op-amp instrumentation amplifier designed for a gain of
100 is shown in Figure 16 . Low sensitivity trimming is made
the
LMC6484
can
reject
FIGURE 15. Low Power 3 Op-Amp Instrumentation Amplifier
a
ADC12038 maintaining excellent accuracy
(Continued)
Supply Voltage, the LMC6484 buffers the
larger
FIGURE 14. Operating from the same
range
of
16
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 3 op-amp instrumentation circuit in
Figure 15 . This combination is used instead of one large val-
ued potentiometer to increase gain trim accuracy and reduce
error due to vibration.
DS011714-29
DS011714-28