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?
This ticket has been assigned and we'll get back to you soon.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
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.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.