Hello,
When operating the ADA4961 in parallel mode, the SDIO pin is not used. Can the SDIO pin be floated in this case? Or should it be connected to GND? Does it matter?
In this linked question (https://ez.analog.com/rf/f/q-a/75043/unused-pins-on-the-ada4961/84423) I see that the A0, A1, and Latch pin should be grounded when in SPI mode, but not sure about unused SDIO pin in reversed mode.
-Thanks!