LMC660EP Datasheet, PDF (12/15 Pages) National Semiconductor (TI) – CMOS Quad Operational Amplifier

Typical Single-Supply Applications
(V⁺ = 5.0 VDC)
Additional single-supply applications ideas can be found in
the LM324 datasheet. The LMC660EP is pin-for-pin compat-
ible with the LM324 and offers greater bandwidth and input
resistance over the LM324. These features will improve the
performance of many existing single-supply applications.
Note, however, that the supply voltage range of the
LMC660EP is smaller than that of the LM324.
Low-Leakage Sample-and-Hold
Sine-Wave Oscillator
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Instrumentation Amplifier
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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.
If R1 = R5, R3 = R6, and R4 = R7; then
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∴ A_V ≈100 for circuit shown.
For good CMRR over temperature, low drift resistors should
be used. Matching of R3 to R6 and R4 to R7 affect CMRR.
Gain may be adjusted through R2. CMRR may be adjusted
through R7.
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