LMC6482

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SNOS674D – NOVEMBER 1997 – REVISED MARCH 2013

Operating from the same supply voltage, the LMC6482 buffers the ADC12038 maintaining excellent accuracy.

Figure 71. 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.

circuit in Figure 72. This combination is used instead of one large valued potentiometer to increase gain trim

accuracy and reduce error due to vibration.

Figure 72. Low Power 3 Op-Amp Instrumentation Amplifier

A 2 op-amp instrumentation amplifier designed for a gain of 100 is shown in Figure 73. 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.

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