AD74413R maximum transient voltaje

Hi rafaelsf ,

thank you for your question, I will be happy to clarify the same.

As described in the text below "Table 12." in "Absolute Maximum Ratings" section +30V from AVDD to AGND is absolute maximum limit. Even short-term peak or transient may cause permanent damage to the chip. These limits should be considered as "maximum upper limits" - Absolute Maximum Ratings. 

Let me know, if this gives you clarity concerning the same. 

Note that operating voltage is lower AVDD = 14 V to 28.8 V (as per specification tables.) 

Regards,

Arnost

Hi APavlik,

Thank you very much for your reply.

Yes, I assumed that the +30 V was the maximum voltage, but then I checked the schematic of the EVAL-AD74413R-DIOZ and it has a +/- 36 V TVS diode on the 24 V input (where AVDD is connected). That made me think that maybe the ADR7413 could withstand transient voltages above 30 V for a short period of time.

Hi rafaelsf ,

that is valid point, +24V TVS rating at EVAL-AD74413R-DIOZ is not ideal from AD74413R perspective. Thank you for bringing that to my attention. 

We cannot guarantee any voltages higher than 30V on AVDD and Datasheet is ultimate source of information. Part may/may not survive particular transients, however there is no guarantee, even more I would say there is risk of permanent damage or impact on the chip performance. 

Regards,

Arnost