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TDC1000: Clock synchronization with the micro

Ali Hassan
Prodigy 40 points
Part Number: TDC1000
Other Parts Discussed in Thread: CC2538, TDC7200

Hello,

I am using TDC1000 and TDC7200 with a microcontroller CC2538

In the application example I see that TDC1000, TDC7200 and mcu are supplied with 8MHz. The MCU that I selected can be provided externally only 32MHz, but it has internal clock divider to operate at 8Mhz.

My question is, do I need to supply MCU, TDC1000 and TDC7200 at the same synchronized clock? 

  • +1
    TI__Mastermind 23045 points

    Hello Ali,

    The TDC1000 and TDC72000 can use up to 1MHz-16MHz clock, in fact the TDC7200 uses said clock in order to calibrate its own internal clock and has shown that the standard deviation decreases at 16MHz vs 8MHz. Whichever clock you do end up using make sure to follow the clock recommendations on the TDC7200 datasheet in order to achieve the most accurate measurements.

    Aside from that, while I do not think a synchronized clock is required I tend to recommend it when the systems operate in sync. This will ensure that all their digital circuits are operating in sync and eliminate any possible timing differences that could arise to if using unsynchronized clocks across the various devices.

    Best,

    Isaac