LM12 Datasheet, PDF (15/18 Pages) Texas Instruments – LM12CL 80W Operational Amplifier

Input offset current: The absolute value of the difference in
the two input currents with the output voltage and current at
zero.
Common-mode rejection: The ratio of the input voltage
range to the change in offset voltage between the extremes.
Supply-voltage rejection: The ratio of the specified supply-
voltage change to the change in offset voltage between the
extremes.
Output saturation threshold: The output swing limit for a
specified input drive beyond that required for zero output. It is
measured with respect to the supply to which the output is
swinging.
Large signal voltage gain: The ratio of the output voltage
swing to the differential input voltage required to drive the
output from zero to either swing limit. The output swing limit
is the supply voltage less a specified quasi-saturation voltage.
A pulse of short enough duration to minimize thermal effects
is used as a measurement signal.
Thermal gradient feedback: The input offset voltage
change caused by thermal gradients generated by heating of
the output transistors, but not the package. This effect is de-
Equivalent Schematic
(excluding active protection circuitry)
layed by several milliseconds and results in increased gain
error below 100 Hz.
Output-current limit: The output current with a fixed output
voltage and a large input overdrive. The limiting current drops
with time once the protection circuitry is activated.
Power dissipation rating: The power that can be dissipated
for a specified time interval without activating the protection
circuitry. For time intervals in excess of 100 ms, dissipation
capability is determined by heat sinking of the IC package
rather than by the IC itself.
Thermal resistance: The peak, junction-temperature rise,
per unit of internal power dissipation, above the case tem-
perature as measured at the center of the package bottom.
The dc thermal resistance applies when one output transistor
is operating continuously. The ac thermal resistance applies
with the output transistors conducting alternately at a high
enough frequency that the peak capability of neither transistor
is exceeded.
Supply current: The current required from the power source
to operate the amplifier with the output voltage and current at
zero.
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8704 Version 7 Revision 4 Print Date/Time: 2008/09/16 12:48:40