Tool/software:
We use TLV320ADC5140 chip to collect signals from 8 digital microphones, but we found that the phases of signals from different channels have significant issues, with large deviations. So we connected IN1P_GPI1, IN2P_GPI2, IN3P_GPI3, IN4P_GPI4 to the DATA output terminals of the same pair of digital microphones. In theory, channels like 1 and 3 should produce identical output results, but in practice, channel 1 and channel 3 have a deviation of several samples, especially channels 7 and 8, which have a deviation of 6 samples. What could be the reason for this?
