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Part Number: LMK04616
We have found a major source of phase variation in our system, which is that the "REF-to-out" phase of the PLL that we use to lock to the 250 MHz distributed from the LMK04616 to produce the 6 GHz sampling clock for our RF DAC is not specified, and in fact has a severe (>5 ps/deg C) temperature dependence.
Can you recommend any PLLs that have good REF-to-out phase stability, especially over temperature?
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In reply to Hao Z:
I wanted to check in on this, any updates?
In reply to Nicholas Carley:
First, are you using the LMK04616 in zero-delay mode? Zero-delay mode routes the output divider back as the feedback, allowing for a much smaller variation in delay between reference and output.
If zero-delay mode on the LMK04616 is still insufficient to get the desired performance, I recommend using the LMK04832 in zero-delay mode instead.
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