Hi,
I am looking for the t_rise spec on the output (100pF or 1nF) across the temperature range (-55 to 120C), the typical at 25C seems to be <1.5ns, but would like to know if this remains below 3ns .
A table or graph would be preferrable.
Thank you.
Regards,
Alberto
Hi Alberto,
I'm afraid I don't have data on that because the device didn't include a transition time specification.
The output transition time will scale linearly with loading. I would recommend against exceeding 70pF directly connected to the output, as the device is only rated at a 50pF load. Anything larger than that, I would add a series resistor to prevent over-current conditions.
The IBIS model gives an idea of the range of transition time with a 15pF load:
This was taken with a 50 ohm load, which is why you see a large voltage offset.
The corners (blue and red) cover temperature and process variations (strongest and weakest, respectively), so it should give you a good range of transition time to consider, at least at 15pF load.
We would expect the same % variation at higher loads, and a linear relationship with load capacitance.
