Hello. While working with the ADL5511 evaluation board, two parts have failed to date. I believe RF was applied once to RFIN with VPOS=0VDC. So, that was probably the root cause of the first failure. But I can’t explain the second ADL5511 failure unless it was caused by ESD. The ESD (FICDM) rating is 1250 V which seems low compared to other parts I have used. Does Analog Devices recommend external ESD protection on pins such as VPOS, VRMS and VENV? Thank you.
I'm not aware of any special handling or external ESD circuitry requirements pertaining to this device, ADL5511, or it's Eval Board.
Since the factory eval boards have no physical covers or protection for the on-board circuitry, proper board handling becomes more important. The edge connector increases vulnerability to ESD mis-handling. Traces connected to IC nodes are exposed. Often in winter weather, the heated indoor air is dry and static buildup on your body can increase. Wearing nice, warm synthetic sweaters doesn't help! It's always a good idea to handle the boards by their grounded RF connectors, thus discharging any static buildup to the ground plane, not the IC small-signal nodes.
Also check the other Abs. Max. Ratings on datasheet page 7 to make sure none of the parameters is being exceeded.
If necessary you could request a Failure Analysis through your local Analog Devices Field Sales Engineer.
Thanks for the quick reply. Yes, ESD can be a problem this time of year perhaps even when using ESD wrist straps.
The Abs max. ratings were not exceeded except perhaps ESD.