Impedance Control may be required when the impedance of specified traces need to meet a certain value, in order to ensure the integrity of the electrical signal when high switching frequencies are involved. When selecting this option, please make sure to include a description or picture of the impedance control traces and the target impedance.
E.g. Single-ended impedance 50 ohm ±10%
3.1 mil traces - differential impedance 100ohm ±10%.
We will modify the stack-up and width of the traces accordingly to meet the impedance requirements.