Please share the detailed design support files for ADV3201, which is not available in website.
I required the reference schematic and IBIS files urgently.
I'll send you the files offline through our Sales Engineer.
I received the files.
I have received the files.
In this reference schematic file, for VPOS and VNEG supplies have too many decoupling capacitors are added.
Kindly confirm whether is it required this much capacitors and what basis its calculated?
The performance of the ADV3201 can be severely degraded by insufficient power supply decoupling so it is important to pay close attention maintain a low supply impedance over the broad frequency range of the signaling frequencies. In terms of total # of capacitors, the evaluation board may be a bit over-designed. I guess it's easier to remove caps than it is to add them!
As a general minimum guideline, I recommend the following:
* One 0.001uF and one 0.0047uF per supply pin. ~40 caps These should be low ESL and placed as close in to the supply pin as possible.
* One 0.01uF - 0.047uF for every other supply pin. ~20 caps
* One 0.1uF for every 4th supply pin ~10 caps
* A mix of 10uF and 1uF, ~ 5 ea. Placement of the large value caps is not critical
If you have space (especially close in to the supply pins), it can't hurt to add in extra decoupling even if you leave unpopulated.
An inter-plane capacitor constructed from adjacent solid power/ground layers in the pcb stackup can be another beneficial way to add additional high-frequency decoupling.
Please be sure to pay close attention to decoupling for VREF, VCLAMP and DVDD.
The MT-101 tutorial may be helpful as well.
Shall i replace the discrete high quantity capacitors to capacitors array?
Please share the evaluation board component placement details.
I don't think a capacitor array would be good as decoupling caps. Yes I agree that it would give you more board space but firstly, the PCB trace from the cap to the supply pins would give you more ESL which is not good and secondly, if one cap is damaged then you'd change all caps which would cost you more. It is much better to use discrete caps in a small package (0402) and place each cap as near as possible to the pins.
Regarding the eval board component placement, I would send it to you offline once I receive it from the PCB layout engineer.
Thanks for your support.
Could you please send the Eval board component placement soon.
Please see attached for the eval board component placement. For more details on the pcb layout of the ADV3201 evaluation board, please refer to the attached a01862b_artwork in ADV3200_3201 Design Support Files
I have downloaded the design support files.
What is the trace impedance shall i maintain for OSD[0:31] and OSDS[0:31] traces?
These OSD[0:31] pins terminated to ground through 75ohm and OSDS[0:31] terminated to ground through 1Kohm resistor.
I'm asking more details on this. I'll get back to you.
The OSD pins are video inputs and should require 75ohm controlled impedance and termination. The OSDS are control pins and do not require controlled impedance and terminations.
Could you please provide the IBIS model of ADV3201.
I think we don't have IBIS model for this part but I'll try to find if there is. I'll update you.
Unfortunately, we don't make IBIS models for crosspoint switches and we still don't have plans to do this in the future.
But if there will be IBIS models in the future, I guess the model will only be for the control or digital interface and not for the analog inputs and outputs.
When designing with ADV3201, what are the electrical parameters has to be considered for enabling one input channel connected to 32 output channels?
The only thing you should consider in setting the ADV3201 in broadcast mode (1 input to 32 output) is the supply current. Its supply current increases as the number of inputs increases. It could reach up to 310mA for no load condition, OSD disabled.
If you have AC-coupled inputs please refer to page 30 of the ADV3201 datasheet.
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