Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

functional, but do not guarantee specific performance limits.

Note 2: For operating at temperatures above 25˚C, the LM392 and the LM2924 must be derated based on a 125˚C maximum junction temperature and a thermal

resistance of 122˚C/W which applies for the device soldered in a printed circuit board, operating in still air ambient. The dissipation is the total of both amplifiers — use

external resistors, where possible, to allow the amplifier to saturate or to reduce the power which is dissipated in the integrated circuit.

tinuous short circuits can exceed the power dissipation ratings and cause eventual destruction.

Note 4: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP tran-

sistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on the

that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value

greater than −0.3V (at 25˚C).

temperature specifications are limited to −40˚C

Note 7: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the outputso

no loading change exists on the input lines.

Note 8: The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode

Note 9: Due to proximity of external components, insure that coupling is not originating via the stray capacitance between these external parts. This typically can be

detected as this type of capacitive increases at higher frequencies.

Note 10: Positive excursions of input voltage may exceed the power supply level. As long as the other input voltage remains within the common-mode range, the

comparator will provide a proper output state. The input voltage to the op amp should not exceed the power supply level. The input voltage state must not be less

than −0.3V (or 0.3V below the magnitude of the negative power supply, if used) on either amplifier.

Note 11: The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be obtained.

Schematic Diagram

Application Hints

Please refer to the application hints section of the LM193 and the LM158 datasheets.

DS007793-2

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