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DS125BR820: Recommend the Configuration for using JESD204B Repeater.
Part Number: DS125BR820
You had recommended the Parameter setting value like below link.
but My customer is ask the below.
About the VOD/VID ratio, the RX mask Results improved with VOD/VID = 1.0 Setting but I'll ask a more detailed response from TI that why they recommend
VOD/VID = 0.77 setting, So no need for additional component changes.
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In reply to Lee Sledjeski:
Thanks for your support.
Do you have a back data or reference for recommend the Output voltage setting to level 3?
In reply to Louis Han15:
I have found that setting the voltage level to ~ 3 gives a very good transfer of the lower frequency waveform data. This helps to ensure the system receiver is getting an accurate representation of the original transmitted signal. The graphic below shows a set ofTx signals on the left and the corresponding output signals of the DS125BR820 on the right.
I requested the Output Voltage Settings for JESD204B running at 9.8 Gbps.
JESD204B should be okay with the settings I recommended.
The VOD setting for JESD204B is not as critical since the interface does not use link training.
The signals in the attachment are from bench equipment, they are just a repeating clock pattern with a 1.0V peak to peak amplitude. The signals each have a different de-emphasis level. The DS125BR820 is showing how it can accurately replicate each of these levels.
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