Hello! I am using this ADC to capture signal (Sinusoid) with frequency up to 200 Hz. I have set my the adc to work for 1 ksps and also receiving the the data rate at 1KHz. Every thing working fine but signal shape is distorted after 60Hz and acquired signal behaviour is not clear hereafter e.g. between 1-60 Hz acquired signal is perfectly match the input but 70-150 Hz signal is totally distorted and thereafter acquired signal gives me low frequency sinusoid. I have checked with two different source but i am getting the same result. I have also checked the adc output after connecting first order antialiasing filter made from passive components. Here is the setting i am using:
A_SYS_CFG =0xE8
D_SYS_CFG=0x3C
CLK1= 0x02
CLK2= 0x20
ADC_ENA=0x07
I am using internal 2.44 V reference with VNCP enabled.
Kindly help to find the problem.