we’re currently using the AD9361 in a system where we need to protect the RF input against destruction of the AD9361.
Unfortunately, the maximum rating from the AD9361 datasheet only says +2.5dBm, but nothing about a time for which a transient would still be fine.
From our RF design guy, I’ve heard the +2.5dBm (0.84Vpp at 50 Ohm) is actually quite difficult to obtain with standard limiters/diodes.
I found a forum entry (https://ez.analog.com/thread/99130-ad9361-protection-in-continuous-wave) suggesting the use of the PE45361A-X
limiter, however, this limiter starts from +7dBm and there seems no other limiter available with a lower threshold which still works at 5 GHz.
Do you have any insights beyond the datasheet regarding the +2.5dBm rating?
(e.g. if +7dBm above simply drive the chip into saturation, or if levels around +7dBm actually destroys things and degrades the receiver performance?)
Are you aware of any other suggestions regarding RF input protection diodes or limiters suitable for the AD9361?