Other Parts Discussed in Thread: ADS124S08, ADS1235, ADS124S06
Hello,
I am using a function generator to give sine wave input of 0-100Vp and trying to see how the signal reconstruction happens at the ADC output when I am reading a particular channel at 9Hz frequency. For signal frequency of 0.5Hz and 1Hz, the signal construction looks fairly ok, but when I see the waveforms for 2Hz,3Hz and 4Hz,I see some attenuation in peaks of some of the cycles. I would like to know what exactly is the reason behind this. Is my data rate( 9Hz) too slow for 2-4Hz input signal or is it a consequence of sinc filter within the ADC. If that is the case , what shall be the data rate required to re-construct 2-4Hz signal. This experiment I am doing to simulate my actual system scenario where my sensor output can vary at 3Hz or 4Hz.Attached are the waveforms for 0.5Hz, 1Hz, 2Hz ,3Hz and 4Hz.