LMC6482QML_16 Datasheet, PDF (20/29 Pages) Texas Instruments – LMC6482QML CMOS Dual Rail-To-Rail Input and Output Operational Amplifier

LMC6482QML
SNOSAR9A – DECEMBER 2010 – REVISED MARCH 2013
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Operating from the same Supply Voltage, the LMC6482 buffers the ADC12038 maintaining excellent accuracy.
Figure 66. Buffering the ADC12038 with the LMC6482
INSTRUMENTATION CIRCUITS
The LMC6482 has the high input impedance, large common-mode range and high CMRR needed for designing
instrumentation circuits. Instrumentation circuits designed with the LMC6482 can reject a larger range of
common-mode signals than most in-amps. This makes instrumentation circuits designed with the LMC6482 an
excellent choice of noisy or industrial environments. Other applications 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 R_g to set the differential gain of the 3 op-amp instrumentation
circuit in Figure 67. This combination is used instead of one large valued potentiometer to increase gain trim
accuracy and reduce error due to vibration.
Figure 67. Low Power 3 Op-Amp Instrumentation Amplifier
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