I didn't have a lot of time to search around to find out how current measurement could be temperature compensated directly in analog circuit, and wondering if you have something in mind. Possibly such kind of question is more suitable for
metrology section of the forum, but just to be in line with what is recently discussed I'm asking it here.
My first guess is that NTC could be introduced in parallel with either R60 or R70 (see
sheet #3) to affect (decrease) IC7 gain as R65 is start to heat up. Mentioned NTC could be in fact consists of two resistors connected in series one ordinary and another NTC to easier find a proper ratio.
Another question is where to place NTC: on top layer near (side by side) the R65 or on the bottom layer beneath R65?
Does it represent too simplistic approach, or something that could be deployed for level of accuracy that we are talking about here (i.e. to have up to ±1 mA accuracy on the full scale of 5 A)?