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BOOSTXL-DRV8305EVM: Wrong current measurement in BOOSTXL-DRV8305EVM

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Part Number:BOOSTXL-DRV8305EVM

Hello,

I use BOOSTXL-DRV8305EVM for  bldc motor control. I added three 1 ohm resistors  in series with motor phases and the following picture is the voltage of one of this resistors and as you can see the motor current is sinusoidal. 

And the bellow picture is the output of current sensing in BOOSTXL-DRV8305EVM (input of ADC) and as you can see it eliminates 90 degree of upper side. Also I tried another  BOOSTXL-DRV8305EVM and I have same results.

So what can I do for solving this problem?

Regards,

Mohammad.


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