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Product Number: AD7770
HI.
I'm testing the AD7770's PHASE ADJUSTMENT function, and it's behaving strangely.
My configuration is like this:
mclk input : 7.68Mhz
SPS : 7680
high resolution mode
SPI control mode
60Hz analog input
According to the data sheet calculation:
(7680Khz/4) / 7680SPS = 250 decimation rate
(7680Khz/4) / 60Hz = 32000
360deg / 32000 = 0.01125deg
I wrote a value of 89 (0x59) to correct the 1deg phase difference.
But it doesn't work the way I want it to.
There is less or more adjustment.
When only one channel is adjusted, when two or more channels are adjusted, the offset is the same, but the adjusted result is different.
What am I doing wrong?
ps. Does phase adjustment adjust the conversion timing?
What am I doing wrong?
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[edited by: PCM at 9:14 AM (GMT -4) on 2 Sep 2022]
