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RE: BoostXL-DRV8301 Current Sensing

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Hi Nick,

the opamp outputs for the current sense in the BoostXL-DRV8301 (IA_FB, IB_FB, IC_FB) are all connected to 56 Ohm series resistors in parallel with 2200 pF caps before reaching ADC pins on the LAUNCHXL-F28069M.

Is that a low pass filter?

Would it affect the scaling reading of the ADCs (0-3.3V), depending on the impedance seen into the opamps outputs? 

Also could you please explain about the usage of the "Net-Ties" (example J7-J10) in the differential pair paths?

Sincerely,

Zeid


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