TUSB1002A: DC gain

Fred Cheng

Part Number: TUSB1002A

Hi team,

we all know AC gain help insertion loss,

but how does DC gain affect or help the "eye diagram" and how should we set this DC gain level base on customer's design?

11 months ago

0 David (ASIC) Liu 11 months ago

TI__Guru**** 152566 points

Hi,

Please see this app note, https://www.ti.com/lit/wp/slla421/slla421.pdf section 4.2.2 DC Gain Settings Eye Diagram Test.

Thanks

David

0 Fred Cheng 11 months ago in reply to David (ASIC) Liu

TI__Expert 5070 points

sorry, David,

one last question,

why AC gain and DC gain plot are different ?

with same x-axis and y-axis, AC gain plot has higher peak, I wonder what's the difference

+1 David (ASIC) Liu 11 months ago in reply to Fred Cheng

TI__Guru**** 152566 points

Hi,

That higher peak is for EQ16. The DC gain plot is with EQ of 1. The AC gain plot does not show EQ of 1. But with EQ of 2, the gain is around 5.5dB, and EQ of 1 is slightly below 5.5dB.

Thanks

David

0 Fred Cheng 11 months ago in reply to David (ASIC) Liu

TI__Expert 5070 points

Thank you

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TUSB1002A: DC gain