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TDC7200: TDC7200 as a delay measurement device.

john carlo bautista
Prodigy 10 points
Part Number: TDC7200
Other Parts Discussed in Thread: TDC7201

Tool/software:

does this device can measure propagation delay of another device? by having the start measurement at input of another device and stop at the output of another device yes this will have a level shifter at the inputs.

  • 0
    TI__Mastermind 23045 points

    Hello John Carlo,

    Thanks for posting to the sensors forum! Depending on the expected propagation delay time this device may be sufficient to make that measurement. I would mainly recommend using the TDC7201 which is a dual channel version of this device. The reason I recommend using the two channel version of the device instead of the single channel version is due to the minimum time needed between START and STOP signals. If you use the two channel variant you could rig it up in such a way that they both use a reference START for both channels and you use one channel to measure the actual START and the second channel to measure the STOP which would be your propagation delay in your case. Essentially your prop delay is the difference between these two measurements.

    The purpose of this is to eliminate the limitations on the device for the minimum time requirements between a START and a STOP signal, if you are curious what these are they can be found on section 7.3 of the datasheet under "Timing Requirements"

    I hope this helps!

    Best,

    Isaac