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.
AFE5809: AFE5809 C-bypass on INM pins Question.
Part Number: AFE5809
For AFE5809, DVDD_LDO 1/2, it is digital power for modulator. It can be internally generated. also , external higher performance 1.4-V supply can be applied to N4 and N6 for minimizing digital noise emission.
What is the requirement for this power supply if we use external spply? Such as, current it consumes, noise requirement, and so on?
In reply to Chen Kung:
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.
Hi Chen, Thanks for you patient answer !
We will follow the spec and seperate DVDD_LDO1/2 on PCB.
I noticed that on page 15-16 of datadsheet, when demodulator is enabled, the additional power consumption is typ.90mW/CH on the basis of max. 190mW/CH. That is 50% increasement.
For 16pcs AFE5809 for our system, no matter internall or external power supply for demodulators, the additional current on D1V8 or on DVDD_LDO1/2 should be :
90mW/CH * 128Channel* 130%(margin) / 1.8V = 8320mA. This is a big increase on current. And I think we have to change our power tree structure.
In reply to yi xiao:
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.