TL/H/7783 LM143/LM343 High Voltage Operational Amplifier February 1995 LM143/LM343 High Voltage Operational … be sustained indefinitely at lower supply voltages, these short circuits … Increased slew rate, together with higher common-mode and supply rejection, insure improved performance at high supply voltages. Operating characteristics, in particular supply current, slew rate and gain, are virtually independent of supply voltage and temperature. Furthermore, gain is unaffected by output loading at high supply voltages due …

LM143/LM343 High Voltage Operational Amplifier General Description The LM143isageneral purpose high voltage operational amplifier featuring operation to g 40V, complete input overvoltage protection up to g 40Vandinput currents compara- bletothose of other super-bop amps. Increased slew rate, together with higher common-mode and supply rejection, insure improved performance at high supply voltages. Operating characteristics, in particular supply current, slew rate and gain, are virtually independent of supply voltage and temperature. Furthermore, gain is unaffected by output loading at high supply voltages due to thermal symmetry on the die. The LM143 is pin compatible with general purpose op amps and has offset null capability. Application areas include those of general purpose op amps, but can be extended to higher voltages and higher output power when externally boosted. For example, when used in audio power applications, the LM143 providesa power bandwidth that covers the entire audio spectrum. In addition, the LM143 can be reliably operated in environ- mentswithlarge overvoltage spikes on the power supplies, where other internally-compensated op amps would suffer catastrophic failure. The LM343issimilar to the LM143 for applications in less severe supply voltage and temperature environments. Features Y Wide supply voltage range g 4.0Vto g 40V Y Large output voltage swing g 37V Y Wide input common-mode range g 38V Y Input overvoltage protection Fullg 40V Y Supply current is virtually independent of supply voltage and temperature Unique Characteristics Y Low input bias current 8.0 nA Y Low input offset current 1.0 nA Y High slew rate—essentially independent of temperature and supply voltage 2.5V/ms Y High voltage gain—virtually independent of resistive loading, temperature, and supply voltage 100kmin Y Internally compensated for unity gain Y Output short circuit protection Y Pin compatible with general purpose op amps…

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