We're specifying the isolation requirements of our Tx/Rx switch in our TDD application, and are wondering if the maximum input level into the LNA is different when the LNA is powered down.
By "powered down", you mean in ALERT, or Tx mode?
I suppose Tx mode.
The max input power into the Rx RF inputs is +2.5dBm peak power. It doesn't matter if the ENSM is in Rx or Tx mode.
The maximum input power level maximum rating remains the same.
I would suggest not having a signal present with the chip powered down. Also, note that a presence of a large signal at the input at initialization can cause issues with DC offset calibration.
The max input power into the Rx RF inputs is specified as +2.5dBm peak power, if the input is OFDM signal with 10dB PAPR, does it mean the max input OFDM power limit will be -7.5dBm no matter AD9361 RX gain setting as ENSM in TX mode?
Yes you are correct.
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