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nRF5340-CMAA replacement?

Greg0

For just a first test board off of Thingy 91x design, can nRF5340-CMAA be replaced with nRF5340-CLAA? What's the downside of doing that? Documentation says it's not recommended for new designs, but can't find details.

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    Hi,

    The nRF5340-CLAA isn't recommended for new designs. The CMAA is a newer addition. In contrast to CMAA, the CLAA has smaller solder balls so there may be a chance that it doesn't properly fit on same landing pads. Also, CMAA and CLAA have different mechanical dimensions and internal bonding. This means that the footprint for the PCB will need an update and so would the RF matching network. 

    Best Regards,

    Samruddhi

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  • 0

    Hi,

    The nRF5340-CLAA isn't recommended for new designs. The CMAA is a newer addition. In contrast to CMAA, the CLAA has smaller solder balls so there may be a chance that it doesn't properly fit on same landing pads. Also, CMAA and CLAA have different mechanical dimensions and internal bonding. This means that the footprint for the PCB will need an update and so would the RF matching network. 

    Best Regards,

    Samruddhi

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