LMC6492 Datasheet, PDF (14/28 Pages) National Semiconductor (TI) – CMOS Rail-to-Rail Input and Output Operational Amplifier

LMC6492, LMC6494
SNOS724D – AUGUST 2000 – REVISED MARCH 2013
APPLICATION HINTS
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INPUT COMMON-MODE VOLTAGE RANGE
Unlike Bi-FET amplifier designs, the LMC6492/4 does not exhibit phase inversion when an input voltage exceeds
the negative supply voltage. Figure 55 shows an input voltage exceeding both supplies with no resulting phase
inversion on the output.
Figure 55. An Input Voltage Signal Exceeds the
LMC6492/4 Power Supply Voltages with
No Output Phase Inversion
The absolute maximum input voltage is 300 mV beyond either supply rail at room temperature. Voltages greatly
exceeding this absolute maximum rating, as in Figure 56, can cause excessive current to flow in or out of the
input pins possibly affecting reliability.
Figure 56. A ±7.5V Input Signal Greatly
Exceeds the 5V Supply in Figure 57 Causing
No Phase Inversion Due to R_I
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