I have some trouble with the calculation of the gain error drift by the AD7903.
gain error = +-0,04%FS
gain error drift = 0,19ppm/C
My reference voltage is 5V.
gain error = +-0,04%*5V / 100% = +-2mV
gain error drift = +-2mV/1e6 * 0,19/C = +-380pV/C
Im not sure, if I should taken 2mV or 5V by the calculation of the gain error drift.