LTC1967 / LTC1968 input common mode voltage setting

Hi,

The LTC1966 / LTC1967 / LTC1968 inputs can be AC or DC coupled. In single ended AC coupling mode, the switched capacitor action sets the input common mode voltage to the desired value (DC value of IN1 reaches V+/2, in figure 9b; IN2 reaches V_DC in figure 9c).

How long does it take at the startup (C_c discharged) for the inputs to reach the correct input common mode voltage through switched capacitor action?