DRV8323: analogue and digital grounds issue

Hi team,

Here's an issue from the customer may need your help:

Is it essential to distinguish between analogue and digital grounds? Is it OK to use only one GND? Here're 2 ways as below:

1) Only one GND, no agnd and pgnd. Is it affecting sampling?

2) With the analogue and protective grounds,  the schematic is as follows:

Does it have a significant impact on the results without distinguishing between digital and analogue? Both GND and AGND, 3.3 V and AVCC are connected through a 0 ohm resistor. 

Could you help check this case? Thanks.

Best Regards,

Cherry