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SDIO pin on the ADA4961 in Parallel Mode

Thread Summary

The user asked if the SDIO pin can be left floating or should be grounded when the ADA4961 is operated in parallel mode. The final answer from the support engineer indicates that the SDIO pin should be grounded in parallel mode. The accompanying answer moved the query to the RF & Microwave Forum for further assistance.

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Category: Hardware
Product Number: ADA4961

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!

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