ADN2820 eye diagram distortion

Hi,

We will adopt ADN2820 for TIA in SFP+ 10G Optoical module, but found eye diagram distortion at 10GHz and high frequency.

Attachment are test  eye diagram and circuit diagram.

Measure points are OUT,OUTB

Could you give some hints to solve it?

Thanks,

Kevin Tsai

attachments.zip
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