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TMC2660-PA Slide 11

Sense Resistors (R4/R6) are susceptible to ground differences and ground ripple voltage, as the microstep current steps result in voltages down to 0.5 mV. The sense resistor layout is also sensitive to coupling between the axes. The two sense resistors should NOT share a common ground connection trace or vias, because PCB traces have some resistance.

PTM Published on: 2014-05-28