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DRV8303: Impedance current amplifier

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Replies: 1

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Part Number: DRV8303

Hi Motor Control Team,

I would like to know the internal impedance of the differential amplifier (Z1, Z2) of the current measurement to calculate the error, if we put additional resistors in the lines.

 

Current Setup:

 DRV8303currentamp.pdf

 

 

Background of my question is to calculate the measurement error because of the resistors in series

Best wishes,

Olrik

  • Hi Olrik,

    The input impedance of the differential amplifier (SNx, SPx) is 5kΩ and the output impedance (SOx) is 100Ω.

    Regards,

    Aaron Barrera

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