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CC2642R-Q1: Receiving sensitivity of CC2642 is lesser than CC2640

Raja A
Prodigy 30 points
Part Number: CC2642R-Q1
Other Parts Discussed in Thread: CC2640

Hi Team,

We have upgraded our board from CC2640 to CC2642, but we are getting receiving sensitivity lesser than CC2640.

So we have compared the sensitivity among launch pads CC2640 vs CC2642 with Smart RF Studio tools.

In that we got the results as the sensitivity of CC2642 is -6 to -7dBm less than what we got in CC2640.

Please refer to the attachments for the results and setup details.

  • 0
    Guru 735455 points

    Basically, CC2640 and CC2642 RX sensitivity of 1M PHY should be the same. It looks you are doing radiation test which might not be accurate. I would suggest you to use signal generate to do conductive test to verify this.

  • 0
    TI__Guru* 94078 points

    Hi,

    I'll ask the proper experts to comment.

    In the meantime, I would recommend to also run some tests with lower transmit power. The signal received by the receiver seems to saturate or almost saturate.

    Last but not least, the radio sensitivity and the RSSI measured by a radio are two different elements.

    Best regards,

  • 0
    Prodigy 10 points

    Hi,

    Yes Understood, Both the radio sensitivity and the RSSI are two different elements.
    Here the RSSI values are in saturated condition.
    But I am getting the below query.

    Why does the Saturated RSSI are different between CC2640 and CC2642 when it act as a receiver? What would be the reason for this difference in saturated RSSI value?

  • 0 in reply to Nishanth Muthusamy
    TI__Guru* 94078 points

    Hi,

    Please note the data sheet mentions RSSI to be +/- 4dBm accurate. In addition to that the actual RSSI saturation value may vary from device to device.

    As said before, radiated tests in saturation may not be the most relevant here.

    Best regards,