DS90UB954-Q1: About the termination information inside the IC of RIN0 ± and RIN1 ±

Hello Hana,

Internal termination for each RIN pin is ~50 ohm.

Dear Hamzeh-san,

I appreciate your quick response.

Please tell me again.

I would like to know the impedance unmatch condition for accurate waveform analysis.
Please tell me the average valueof the internal resistance value during operation, or if the value varies, the upper and lower limit values.

Regards,
Hana

Hello Hana-san,

this can be found in the datasheet, under "FPD-LINK III RECEIVER INPUT". Which is min = 40ohm and max = 60ohm

Dear Hamzeh-san,

Thank you for your reply.

I checked with the person in charge of waveform analysis,

”There is not enough information such as the components in PKG that connect from PIN to DIE.
I want to perform return loss analysis of FPD-LINK, so Could you give me the equivalent circuit or the S parameter of the input pin (RIN pin)?”
is what they said.

Could you give me the above information?

Regards,
Hana

Hello Hana-san,

Please receive the IBIS-AMI Model in the attachement.

TI_FPD-Link_IBISAMI_DS90UB953_954_ADS_rev1_030320 (2).zip

Dear Hamzeh-san,

Thank you for presenting the information.
I will proceed with the analysis with the information I received.
If anything happens, let me ask you another question.

Regards,
Hana

Okay, thanks!