Affect of traces connecting the current sense resistors on current measurement accuracy
Last Updated: 12/05/2011
Do the traces connecting the current sense resistors affect current measurement accuracy?
The traces connecting the current sense resistor to the PowerPSoC do not affect the current measurement accuracy, when the traces are routed differentially.
Current sense traces routed differentially will have similarly length and similar voltage loss due to bias current into the CSA pins on the PowerPSoC. The traces routed differentially will also minimize any effect from signal crosstalk or coupling. Any coupling will affect differentially routed traces equally as the coupling net couples equally to the differential traces.