Hi Maverick_1984 ,
Thank you for reaching out. I find your question in Chinese characters. I just use online translation for me to understand your question. Kindly bear with me and see if I have answered your question correctly.
Yes, the PID control is in the chopper2 amplifier using analog control mode. You are correct that the ADN8834 does not have it's own digital controller. If you are to use digital control, it will be done by an external microcontroller.
Thanks and regards,