DS90UB960-Q1: IMpedance value & Reference plane

shivani Garg

Part Number: DS90UB960-Q1

Tool/software:

For below image, Inputs coming from connector, we are routing as single ended 50 ohm in L6 layer( 6 layer stackup) & providing reference of L5 layer.

Is this ok? No impedance control is required for this.

9 months ago

0 Logan Cummins 9 months ago

TI__Guru 66840 points

Hello,

Due to US public holiday, support will be resumed on Monday Dec 2nd. Thank you for your patience.

Regards,

Logan

0 Zoe Bison 9 months ago

TI__Mastermind 23975 points

Hi Shivani,

In general it is recommended for the FPD trace to be routed as single ended 50 ohm throughout the trace with antipads underneath components touching the high speed trace. L5 is recommended to be a ground layer in this context.

Best,

Zoe

0 shivani Garg 9 months ago in reply to Zoe Bison

Prodigy 40 points

So, L5 should be ground from connector pins to pin of ICs with antipads under components in L5. L4 should be ground then?

Thanks

0 Zoe Bison 9 months ago in reply to shivani Garg

TI__Mastermind 23975 points

Hi Shivani,

From a high level, L4 does not need to be ground. The recommendation would be for L5 to be a ground layer.

Layout examples are shown in section 8.5.2 Layout Example of the UB960 datasheet for reference regarding antipad implementation.

In addition, if you would like a complete layout review for this design, please feel free to request this by submitting another E2E. :)

Best,

Zoe

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DS90UB960-Q1: IMpedance value & Reference plane