The input offset voltage of operational amplifiers (op amps) arises from unavoidable mismatches in the
differential input stage of the op-amp circuit caused by mismatched transistor pairs, collector currents, currentgain betas (β), collector or emitter resistors, etc. The input offset pins allow the designer to adjust for these
mismatches by external circuitry. These input mismatches can be adjusted by putting resistors or a potentiometer
between the inputs as shown in Figure 2. A potentiometer can be used to fine tune the circuit during testing or for
applications which require precision offset control. More information about designing using the input-offset pins,
see Nulling Input Offset Voltage of Operational Amplifiers (SLOA045).
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