The initials, IC, simply mean that the op-amp is made inside an integrated circuit. Op-amps have a total of 8 pins, and out of those 8 pins, 1 is inactive( pin no. 8) and 7 are active. 4 of the pins (2, 3, 4, and 7) supply the output, and one of the pins (pin 6) observes the output. So 7 means 7 active pins, 4 means 4 inputs, and 1 means 1 output.
Myself Mayuri Parekh.I have technical test for ME in LD
engineering college,gujarat.plz send me technical questions
and also answers so i can practise.plz send me as early as
posibble.my wxam will be in MAY 2009.