i had a little play time with the original spice model, and tried some numbers on it. it seems to work (the original file parameter TC = 20e-6)
but does anyone actually use it to determine compensation values?
but realistically speaking, if the VREF does have the TC on the edge of 20ppm/C, and the simulation seem to come up with a compensation for a certain range, would you still do it? (@ about 9th iteration, i found some values which give a "flat-ish" plateau even for a 20 ppm? how real can this be?
) ** just to be sure, for the plot with the "flat", i added extra 2 points, the curve now appears to be a "S". a very interesting "compensation"