SBAS901C July 2018 – October 2020 REF34-Q1
It is important to keep track of the error margin in this system to make sure that the total error of the voltage reference and ADC are less than the maximum 1% error allowed. To calculate the total RSS error of a voltage reference use Equation 5.
With the RSS error of the voltage reference, the ADC error needs also needs to be calculated using the RSS method as seen in Equation 6. Equation 7 can then be used to sum both errors. It is important to make sure that only the applicable voltage reference error in relation to the measured signal is used.