LMC6464AMJQML datasheet(11/23 Pages) NSC

11 / 23 page

LMC6464QML

www.ti.com

SNOSAR8A – DECEMBER 2010 – REVISED MARCH 2013

APPLICATION INFORMATION

INPUT COMMON-MODE VOLTAGE RANGE

The LMC6464 has a rail-to-rail input common-mode voltage range. Figure 32 shows an input voltage exceeding

both supplies with no resulting phase inversion on the output.

Figure 32. An Input Voltage Signal Exceeds

the LMC6464 Power Supply Voltage

with No Output Phase Inversion

The absolute maximum input voltage at V+ = 3V is 300 mV beyond either supply rail at room temperature.

Voltages greatly exceeding this absolute maximum rating, as in Figure 33, can cause excessive current to flow in

or out of the input pins, possibly affecting reliability. The input current can be externally limited to ±5 mA, with an

input resistor, as shown in Figure 34.

Figure 33. A ±7.5V Input Signal Greatly Exceeds

the 3V Supply in Figure 34 Causing

No Phase Inversion Due to RI

Figure 34. Input Current Protection for Voltages Exceeding the Supply Voltage

RAIL-TO-RAIL OUTPUT

The approximated output resistance of the LMC6464 is 180

Ω sourcing, and 130Ω sinking at VS = 3V, and 110Ω

sourcing and 83

Ω sinking at VS = 5V. The maximum output swing can be estimated as a function of load using

the calculated output resistance.

Submit Documentation Feedback

Product Folder Links: LMC6464QML

LMC6464AMJQML Datasheet(PDF) 11 Page - National Semiconductor (TI)