ADS1282: ADS1282 What duty cycle limits for the main clock?

Tool/software:

Hello,

I don't see in the datasheet limit applicable on duty cycle of the main clock. What is the minimum high level and minimum low level for this clock?

I would like to use a clock around 4 Mhz with a 100ns low level and a 150ns high level, is it possible?

thanks in advance.