DS25BR120: EVM output swing 600mv CONSULT

Marsh Cai

Intellectual 2055 points

Part Number: DS25BR120
Other Parts Discussed in Thread: DS25BR110

Hi experts,

Hope you are doing well.

My customer reported an question about the DS25BR120 EVM that the output swing of EVM is 600mV.

But according to the datasheet, the output swing should be the 350mv.

Can you help to give some comments?

Thanks and BRs,

Marsh Cai

over 2 years ago

0 Malik Barton57 over 2 years ago

TI__Guru 64326 points

HI Marsh,

Can you share a block diagram of the test setup here?

0 Marsh Cai over 2 years ago in reply to Malik Barton57

TI__Intellectual 2055 points

Hi Malik,

Thanks a lot for your reply.

About the test setup you can refer to https://www.ti.com/lit/pdf/snlu017 . The eye diagram above is copied from here. And as it dictated, the setup for this diagram is no another stripline and with PE/EQ=OFF.

Can you help me to figure out that V_OD= (Out+) - (Out-), right? If so, according to the DATASHEET, V_OD should be 350mv.

And then, in our EVM, the swing of the eye diagram is 700mv actually.

Thanks and best regards.

Marsh Cai

+1 Malik Barton57 over 2 years ago in reply to Marsh Cai

TI__Guru 64326 points

Hi Marsh,

I think the figure in the users guide was done with DS25BR110, both devices share an EVM.

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DS25BR120: EVM output swing 600mv CONSULT