OPA858DSGEVM: OPA858DSGEVM || TIA Design for 500MHz input frequency

Shine Jo Tom

Part Number: OPA858DSGEVM
Other Parts Discussed in Thread: OPA858, OPA859

Hi,

In the layout of evaluation board of OPA858 and OPA859, what is controlled trace impedance and type of the main signal trace? Which of the following is it?

1)50ohms normal single ended transmission line

2)50ohms co-planar transmission line

Could you share the layout file of the OPA858 please?

over 1 year ago

0 Sam Burnett over 1 year ago

TI__Expert 3620 points

Hi Shine,

They are 50 Ohm GCPW from the looks of it. I can send you the layout files, but the trace width you need is going to depend on the stackup and dielectric you choose for fab, assuming you are making your own board?

Best,
Sam