Tool/software:
The connection of a resistor to the SS/EN pin cause an exponential relationship in the capacitor voltage (parallel resistor and capacitor with constant current source)
The voltage equation of the capacitor should be:
The time Tss required for this network to reach 0.55 + VEA+ can be found by substituting into the above equation:
solving for Css give us the following equation:
and since RSS = 825kohm, then we get the same equation as (2) without 25uA in the numerator: