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LMX1205: issues with the IBIS model

Part Number: LMX1205

Hi team,

i'm using the IBIS model of the LMX1205. I try to simulate the CLKOUT model: i selected the pin 18 and 19.

I attach the electrical schematic.

 

LMX1205_IBIS_MODEL.jpg

 

The port number 3 is the signal source (square wave with frequency of 5 GHz).

At the ouput of the model, i'm not getting a correct waveform. Why? Do you see some problems with my settings?

I try to use another ibis model (LMK04610RTQ) and it works correcty.

Can you help me?

Thank you in advance.

Best Regards,

Matteo Ricci