Part Number: ADC3221EVM
Signal generator outputs an up-ramp signal (100 kHz, 600 mVpp, like following graph), and feed to ADC3221EVM.
Said up-ramp signal feed to CH1, ADC captured following waveform:
The same up-ramp signal feed to CH2, ADC captured following waveform:
Therefore, I wonder:
- Why the signal captured by ADC is so heavily distorted? Is this normal?
- Feeding the same signal, why CH1 and CH2 captured different waveform? CH1's waveform looks flipped, is this expected?
- Compared to CH1, CH2's waveform has a very high frequency low amplitude component, its frequency is 12.5 MHz, exactly half the sampling frequency. What could be the cause?
Please advise, Thank you.