LMC6022

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SNOS622D – NOVEMBER 1994 – REVISED MARCH 2013

(V+ = 5.0 VDC)

If R1 = R5, R3 = R6, and R4 = R7;

Then

∴AV ≈ 100 for circuit shown

For good CMRR over temperature, low drift resistors should be used. Matching of R3 to R6 and R4 to R7 affects

CMRR. Gain may be adjusted through R2. CMRR may be adjusted through R7.

Figure 36. Instrumentation Amplifier

Oscillator frequency is determined by R1, R2, C1, and C2:

fOSC = 1/2πRC

where R = R1 = R2 and C = C1 = C2.

This circuit, as shown, oscillates at 2.0 kHz with a peak-to-peak output swing of 4.5V.

Figure 37. Sine-Wave Oscillator

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