Part Number: DS90UB948-Q1
Tool/software:
Hello TI Team,
Does the IBIS pin model correspond to the following?
Below is "LVDS_OUT_VOD11" output waveform:
the VOD reaches about 900mV
Below is "LVDS_OUT_VOD11" output waveform:
the VOD reaches about 800mV
IBIS output levels seems to be out of specification。
Why?
Best Regards!
Wang Jingkun
Hi Jingkun,
Thank you for attaching your ADS setup and the resulting eye diagrams. Are you terminating the output of the LVDS traces with a 100Ω resistor? And what is the Vhigh of the VtPRBS generator? These can affect the VOD of the LVDS signal.
Below are my results with VOD11 and VOD00. They very closely match the typical datasheet values.
Best,
Jack
Hello Jack,
And what is the Vhigh of the VtPRBS generator?
The VtPRBS generator's Vhigh is 1.0V.
Are you terminating the output of the LVDS traces with a 100Ω resistor?
I used the Term_Diff1. It is caused by the termination resistor.
Using the 100Ω resistor same with your setup, the simulation result matched the datasheet.
Thank you for your confirming.
Best Regards!
Wang Jingkun
Hello Jack，
Do you have FPDLINK-III TDR simulation setup?
How to set the Rise time of VtStep and MaxTimeStep of TRAN?
Best Regards!
Wang Jingkun
