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: ADS5240
Datasheet show sample rate is from 20~40 MSPS, If we want to use lower 20 MSPS, for instance 1MSPS, does it have any bad effect?
the ADS5240 has a serialized output to output the 12 bits of sample data onto a single LVDS pair at 12 times the rate of the sample clock, and to do that the ADS5240 has to take the sample clock and multiply it up by a factor of six to generate the DDR bit clock for the serial output. This requires a PLL to take the sample clock and multiply it up to make the LVDS bit clock. PLLs will commonly have a maximum and a minimum for the clock frequency that they can lock on to, and a factor of 2 to 1 from maximum to minimum is not uncommon. A sample clock of 1MHz would be so much below the minimum sample rate that the PLL would probably fail to be able to lock on to that clock at all. Under nominal conditions the actual range of frequency over which the PLL might be seen to operate might be wider than the datasheet limits, but over the range of temperature and voltage these limits are what the device is guaranteed to support, and these are the limits to which the device is tested in production. We cannot guarantee operation outside of the min and max limits.
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.
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.