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CC2530: Alternative device with precise time stamp

Danilo A.
Mastermind 31830 points

Part Number: CC2530
Other Parts Discussed in Thread: CC2531, CC2650, CC2520

Hi Team,

The CC2520 is currently out of stocks. Our customer is looking for an alternative device that is capable of providing a timestamp around 1us precision. Are the CC2530, CC2531 and CC2650 suitable for this application? 

Regards,

Danilo

  • 0
    TI__Mastermind 35070 points

    Hi Danilo,

    I'm not familiar with CC2520, where are you (or customer) seeing the 1us precision in the datasheet?

    Note that those other device you've listed (CC2530, CC2531, CC2650) are MCU + radio, so it would require a HW change as well.

    I will notify with HW team if they have any recommendations for this.

    Thanks,
    Toby

  • 0 in reply to Toby
    TI__Mastermind 31830 points

    Hi Toby,

    Thank you for your response. Please see the feedback of our customer.

    In order to reach such precision, we made a few prototype boards.

    I'd like to emphasis the following : "The chip should be able to provide timestamps with a precision AROUND the microsecond or lower"
    Indeed, we were able to go even lower than that, with the following results : 

    In the technical literature attached to this email, they use this signal to reach synchronization above the µsecond, which we were able to replicate.

    So, the question is: do you have another component which is capable of providing such features?

    schmid10vht.pdf

    Regards,

    Danilo

  • +1 in reply to Danilo A.
    TI__Expert 6830 points

    Hi Danilo,

    Based the cc253x/4x user guide chapter 22 (https://www.ti.com/lit/ug/swru191f/swru191f.pdf), with an accuracy of 31.25ns, 1us precision should be achievable with either devices.

    Best regards,

    Bun