Question

The input offset voltage of 741 op-amp has an absolute maximum value of 6mv, which means

(a) Minimum difference between input terminals in 741 op-amp can be large as 6mv DC

(b) Minimum difference between input terminals in 741 op-amp can be large as 6mv AC

(c) Maximum difference between input terminals in 741 op-amp can be large as 6mv DC

(d) Maximum difference between input terminals in 741 op-amp can be large as 6mv AC

I got this question in an interview for internship.

This key question is from Input Offset Voltage topic in division Operational Amplifier Fundamentals of Linear Integrated Circuits

Answer 1

The correct answer is (c) Maximum difference between input terminals in 741 op-amp can be large as 6mv DC

In simpler terms: Given, the absolute maximum value for a 741 is Vio= 6mv. Therefore, voltage at the non-inverting input terminal may differ from that at the inverting input terminal by as much as 6mv dc. Also the output offset voltage is a DC voltage and it cannot be AC voltage.