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phase difference in channels

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Thread Summary

The user observed a 180-degree phase difference between CH1 and CH2 on the AD9613 EVAL-BOARD when sampling two sine signals with no phase difference. The issue is due to the swapped polarity of Channel B in the board's schematic. The solution is to invert the digital output signal of Channel B using Register 0x14, bit 2.
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Category: Datasheet/Specs
Product Number: AD9613

Hello there,

I used an AD9613 EVAL-BOARD for sampling from two sine signal (two sine signal with 0 phase difference that checked up with oscilloscope too)

but when I use Matlab I see that there is 180 degrees phase difference between CH1 and Ch2 of AD9613.

why there is phase difference between two channel and how can I fix it ?

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[edited by: humhum at 10:54 AM (GMT -4) on 18 Jun 2025]