Hello,
I am using the UC1901 Isolated Feedback Generator as a simple isolation amplifier similar to that shown in DN-19. My circuit is slightly different from the design note in that I bias the NI pin with a fixed voltage less than the 1.5V reference (using a voltage divider). The circuit is attached for reference.
I am able to get fairly linear response as long as the temperature of the UC1901 is somewhat stable (within a few degrees). While precision is not super critical for this application I would like to compensate for the fairly large UC1901 output voltage swing as a function of temperature since my application requires -20degC to 60degC. Does anyone have a suggestion for providing some temperature compensation for the UC1901 used as an isolation amplifier? Thermistors for the voltage divider feeding the INV pin or elsewhere? Thanks,
Bill
