Since the time jitter performance of the LMK00301 depends on the slew rate of the CLKin signal, I would like to confirm that we are computing the input slew rate correctly.
The differential CLKin signal is the voltage difference Vid between the voltage applied to the CLKin and CLKin* pins (for example, CLKin0 and CLKin0* or CLKin1 and CLKin1*). If the signals applied to the CLKin and CLKin* pins have the same 20%-80% rise and fall times tr and tf, and if tr and tf are equal, then the differential input slew rate is 2*Vid*(80%-20%) / tr.
For example, if the signal applied is an LVDS signal with Vid = 400 mV, rise time tr = 175 ps and fall time tf = 175 ps, then the slew rate would be (+400 mV - (-400 mV)) * (80% - 20%) / 175 ps = 480 mV / 175 ps = 2.7 V/ns.
Is that correct?
