K04RLM12 Datasheet, PDF (16/23 Pages) Texas Instruments – Operational Amplifier

K04RLM12, LM12CL
SNOSBY8D – MAY 1999 – REVISED APRIL 2013
OBSOLETE
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Dual supplies are not required to use an op amp as a voltage regulator if zero output is not required. This 4V to
50V regulator operates from a single supply. Should the op amp not be able to absorb enough energy to control
an overvoltage condition, a SCR will crowbar the output.
REMOTE SENSING
Remote sensing as shown above allows the op amp to correct for dc drops in cables connecting the load. Even
so, cable drop will affect transient response. Degradation can be minimized by using twisted, heavy-gauge wires
on the output line. Normally, common and one input are connected together at the sending end.
AUDIO AMPLIFIERS
A power amplifier suitable for use in high-quality audio equipment is shown above. Harmonic distortion is about
0.01-percent. Intermodulation distortion (60 Hz/7 kHz, 4:1) measured 0.015-percent. Transient response and
saturation recovery are clean, and the 9 V/μs slew rate of the LM12 virtually eliminates transient intermodulation
distortion. Using separate amplifiers to drive low- and high-frequency speakers gets rid of high-level crossover
networks and attenuators. Further, it prevents clipping on the low-frequency channel from distorting the high
frequencies.
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