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?
about 4 years ago
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.