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DRV8801: DRV8801 Current Sense Measurement Bias

Part Number: DRV8801
Other Parts Discussed in Thread: TM4C123GH6PM


I have a DRV8801 circuit, where the the current sense circuitry is wired as below:

The Rsense is 0.1ohm, and vpropi is passed to a 33nf cao tru a 10K resistor. The current sense is read by an adc on a tm4c123gh6pm.

I am reading 0.13V on the csense, even when the motors are not working. When this bias is corrected, the numbers that the adc gives are correct, as tested by an external current meter.

What is the reason to this 0.13V when motors are inactive? And how can I solve it? Is this a normal thing for the drv8801, or my circuit could be defective?

Best Regards,