ICM7556, is A New Era in Glitch-Free Chopper Stabilized Amplifiers

The biggest single problem with the application of op amps has been the input offset voltage. This is indicated by the fact that almost all important op amps from the ¿A741 and LM101 on have offered offset null adjustment pins, special screening to low offset voltage values, and/or internal VOS trimming laser or Zener-zap. Also consider the extensive series of specifications devoted to its variability with temperature, time, common-mode voltage (CMRR), power supply (PSRR), output voltage (AVOL), and sometimes even down to variation of temperature drift with offset null correction