TDC7200: Using one clock for three TDC7200s

Hello Andrew,

Thanks for posting to the sensing forum! The clock should be okay without a fanout buffer if the distance between the clock and the TDC clock inputs are not far from each other, especially since the clocks inputs on the TDC7200  are only used for calibration of the internal clocks so the clock is not continuously being sampled. If you have the clock source on different boards or really long trace lengths then a clock buffer would most likely be necessary.

I tried checking the ECS-TXO-2016-33-160-TR datasheet for any recommendations for this clock but the datasheet was very scarce with information. I would make sure to keep the traces as short as possible to the devices and try to keep the traces as equivalent in length as possible to avoid any impedance mismatches due to trace length. Avoid right angles in your traces to reduce the possibility of EMI.

I hope this helps!

Best,

Isaac