We have the HMC 7357 eval board, but we have some questions about thermal analysis and a lifetime spec stated in the thermal analysis application note.
First question: We followed the thermal calculation example provided as an application note for the amplifier we own. However, we want to make sure that the number and size of Vias in the HMC 7357 are the same as the HMC408LP3 evaluation board provided in the example.
Second Question: On page 8 of the same application note (Thermal Management for Surface Mount Components) states that the typical guaranteed minimum lifetime is "106 hours (114 years)." Is this a typo, and if not, how do we look at this information to reconcile the hours to years?
Thank you again for your cooperation and assistance.