This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: LMK03318
The output may disappear after working for a while. Sometimes it always keeps OK.
The output becomes OK after reset the power supply.
Any suggestion for this?
To design your own Clock Tree solution, visit WEBENCH Clock ArchitectMore information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html
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 Alan O:
In reply to Timothy T:
This is BOE.
I used the second clock input, 100MHz differential input and 270MHz output. After running for a period of time, the LMK03318 output is 230Mhz instead of 270Mhz.
I checked the PLL, the P_LOL signal status lamp flickered. When the P_LOL signal status lamp is always on, the output of LMK03318 changes from 270 Mhz to 230 Mhz.
Here is my setup interface, Could you tell me where the settings are incorrect?
Looking forward to your reply.
In reply to user4949375:
I suggest the following changes, based on your frequency plan:
On Inputs/PLL page...
External (onboard) C2 cap = 3300 pF
According to the settings you recommended, the P_LOL lamp still flickers and the LMK03318 will still turn 230MHz after running for a period of time.
Do you know how to solve this problem?
Is your reference input a stable clock source, like a crystal oscillator, or is it a noisy recovered clock? It should be stable in both frequency and amplitude.
Also, did you try triggering a soft reset after writing all registers, so the PLL/VCO gets re-calibrated (after the reference input is stable)?
I set the Charge Pump Gain to 0.4mA, the LMK03318 outputs is 270Mhz.Now the LMK03318 can work properly.
Thank you very much for your help.
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.