Topic: Question regarding external sampling clock  (Read 7810 times)

sron_jt August 16, 2013, 09:13 AM

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We would like to use a external 2GHz sampling clock for the FMC230, is it possible to use a LVPECL level type clock for this purpose?
The user manual states that LVTTL levels are supported, but what about a LVPECL signal with for example a 780mV voltage swing.
Will this, in combination with its common mode voltage of about 2V, be enough?

Kyu October 15, 2013, 11:49 AM (#1)

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The input signal is converted to ac coupled differential through the single-ended to differential transformer circuit. The input sensitivity of the clock tree device is 150mV. Thus, 780mV swing LVPECL is enough.

  • « Last Edit: October 16, 2013, 11:34 AM by Kyu »