Sundance SMT950 - Manual (Page 15)

Version 2.0 Page 15 of 52 SMT950 User Manual
Clock Structure
There is one integrated clock generator on the module (AD9510 – Analog Devices).
The user can either use this clock (on-board) or provide the module with an external
clock (input via MMCX connector).
Figure 6 - Clock Structure.
ADCs can all receive the same clock or the integer multiple of it (x2, x3, …x32), the
maximum being 125MHz for each ADC. This clock can be coming from the on-board
VCXO or from an external source.
An extra connector outputs the reference clock for multiple-module systems.
Below is shown how the external clock is fed to the system. By default it is single-
ended and AC-coupled before being converted into LVPECL format. The option of
having a differential external clock is still possible on the hardware by the way of
fitting or not some of the components.