CDCM7005: Output impedance spec

Hi Jade,

When a datasheet didn't show the input or output impedance for  a pin, try to find related data from IBIS model.

The following equation defines the characteristic impedance of the IBIS model pins.

For details about how to find the correct Lpin, C_pin, C_comp from IBIS model, here is an useful article.

The IBIS model, Part 3: Using IBIS models to investigate signal-integrity issues

Hope it could solve your problem.

Happy New Year !

Best Regards,

Shawn