The OP177 is an Ultra-precision Operational Amplifier features one of the highest precision performances of any operational amplifier currently available. Offset voltage of this is only 25µV maximum at room temperature. It combines with its exceptional offset voltage drift (TCVOS) of 0.3µV/°C maximum to eliminate the need for external VOS adjustment and increases system accuracy over temperature. It provides chopper-type performance without the usual problems of high noise, low frequency chopper spikes, large physical size, limited common-mode input voltage range and bulky external storage capacitors.