The instrumentation amplifier with double-channel low pass filter for analog interfaces sensors

This article presents the design results of the precision microcircuit of the instrumentation amplifier (IA) based on the fully differential difference op-amp (FDDA) and the double-channel low pass filter (LPF). It shows that the application of such IA leads to the high parameters of the sensor interface in the stability of offset voltage (V∞ < 250uV) and common-mode rejection in the extended temperature range and on exposure to the neutron flux up to Fn=10¹³ n/cm². The results of the IA simulation designed on the base of radiation-hardened BiJFet technology are given (OJSC “Integral” Minsk)‥(87cлob)