CertusPro-Nx: What are the recommended LPDDR4 trace impedance for CertusPro-NX devices?
Solution:
There are three options presented:
- 50-ohm single-ended with 100-ohm differential
- 40-ohm single-ended with 80-ohm differential
- 48-ohm single-ended with 96-ohm differential
Here are some notes from our SME regarding the trace impedance options:
- 40/80 takes a bit more power than 48/96.
- 40/80 tends to have a little better signal integrity than 48/96.