LMH1297: LMH1297 IBIS-AMI

Darren Yang

Expert 2000 points

Part Number: LMH1297

Hi Sir

Now the eye diagram of the prototype test is not very good. Under 12G, it often loses lock. We need to do the simulation of the signal integrity of the PCB to see if there is a problem with the PCB design.

could you help provide the model of IBIS-AMI or hspice for me, tks!

over 6 years ago

0 Nasser Mohammadi over 6 years ago

TI__Guru* 93670 points

Hi Darren,

Please register at TI.COM using your company email address and send me email at Nasser.mohammadi@ti.com

Regards,, Nasser

0 Darren Yang over 6 years ago in reply to Nasser Mohammadi

Expert 2000 points

Hi Nasser

thanks for your help, now we also have above questions need your help, pls help check it,tks!

SDI_IO+ and SDI IO- are equal in length, but I don't see the same length on the EVM DEMO board. Please help check it, SDI_IO+, SDI_IO-Do you want to be equal? If so, how many mils do you have to control?

0 Nasser Mohammadi over 6 years ago in reply to Darren Yang

TI__Guru* 93670 points

Hi Darren,

It is a good layout/design practice to make these two traces the same length. This is because we would like to have a balanced impedance as much as possible. Based on doing layout on several boards and customer designs, we have not seen a negative side effect if we have a shorter trace on SDI_IO-. What you have in your pcb layout looks fine. It would be a good idea if you can make SDI_IO+ trace shorter(if possible).

Regards,, Nasser

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LMH1297: LMH1297 IBIS-AMI