current sensor LAX 100-NP PCB design
The datasheet asks to create a complete turn for high frequency.  They illustrate that with a drawing at the bottom of p.10 .  I think, this drawing doesn't show that the sign of the output for the left side would be opposite than that for right side (assuming that the sensor wasn't turned 180° around its vertical axis).



Let's assume that in a low-speed design, the trace that goes to the left edge of the drawing corresponds to upstream and right one is downstream.  In a high speed variant, the right hand side of the drawing would be upstream.  Alternatively, you can accept that the sign will be inverted.