VADC output graph looks weird in XMC4500

Hi,
I have generated a project to obtain high sampling rate of VADC using XMC4500-F100x1024 Relax Lite Kit. But the output graph I generated seems like the sampling is not good enough..Can anybody tell me
what I did wrong in the VADC settings. I am hereby attaching my VADC settings as well as some screenshots of the output graph.

pics:-
Attachment 2909
Attachment 2910
Attachment 2911

VADC Settings:-
Attachment 2912
Attachment 2913

Thanks in advance...

?????

• @400Hz.jpeg‎ (364.3 KB)
• @800Hz.jpeg‎ (367.3 KB)
• @2kHz.jpeg‎ (401.1 KB)

?????

• global_adc_conf.txt.txt‎ (13.4 KB)
• adc_measurement_adv_conf.txt.txt‎ (20.4 KB)