DRV8305-Q1EVM: How to capture a full sine wawe without offset with ADC

Im working on a motor spin project using DRV8305-Q1EVM .

My main problem is that i cannot get any negative results while reading a "sine" wave from ADC.

EVM board has no sensor or OPAMP circuit on sampling side of system.

But the projects that prepared by TI , has no such issue. On the same hardware ,TI projects managed to capture a full sine wawe.

These are the voltage and sense circuit on EVM . The last picture is my desired and current adc reading.

What should ı do in order to capture a full sine wave from ADC . 

Thank you,

Efe