Which among the following is a military grade op-amp IC ?

Which among the following is a military grade op-amp IC ?

a. IC 555
b. IC LF 398
c. IC LM 117
d. IC 741

Correct Answer : d. IC 741

Explanation :

Op-amp ICs varying in the version of 741 are highly approved or sanctioned for military grade since the temperature range lies within -55° to 125°C. So, as the temperature level range display variations, the op-amp IC741 are further sub-categorized under the series of 741C, 741A & 741E & so on. Besides these, 741S & 741SC are recommended for military as well as commercial aspects due to high slew rate. Other ICs mentioned in the question are only applicable to certain specific sort of applications other than the military ones. Apart from these versions, IC 555 are widely applicable in timers, oscillators & pulse generators. IC LF 398 forms a leading part of sample & hold circuit while IC LM117 can be used as a switching regulator & also provides full overload protection to other ICs.