to User473,
I searched all the op amp portfolio with the parametric search (precision, general purpose, and high-speed). There are 6 options with temperatures of 150C and above (see attached). The best match is the OPA211-HT (210C max). This is the…
Updated schematic with separate Vsense for B+ and Vesne+ using either a TLV171 or INA821 for the 4-wire battery hookup. the 4-wire hookup needs special attention because of the common mode noise being injected into the battery directly pushing the Vsense…