RHF1401 - Protection diodes for VIN and VINB

[ale-s]

We use the RHF1401 in a space application. In front of the RHF1401 we have a single to differential buffer, which is susceptible for radiation transients. So it can occur, that the RHF1401 receives a transient with -1.3V to 5.55V at is inputs. The transient is present for 15us.

How much current can the protection diodes manage?

We have series resistors which reduce the current of the transient (10.5mA negative pulse, 74.5mA positive pulse).

Best regards, Alessandro

[Muhammed Güler]

These diodes are there for ESD protection. Considering the non-repetitive nature of the ESD signal you should not waste power on them.
If the transient voltage does not come very often, the prototype will most likely work.
If I were you, I would prefer to use one or two extra elements instead of hoping that the "parameter not written in the datasheet" will not cause any problems.