AnsweredAssumed Answered

AD7714 often returns 8388608 despite actual signal on the input channel

Question asked by Verdris on Feb 2, 2013
Latest reply on Feb 11, 2013 by ChrisD.Rama

Hi all,

 

Occasionally when reading from my AD7714, I'll get 8388608, even when there is an incredibly small signal on the input. Since 8388608 is exactly (2^24)/2, I'm wondering if this is some sort of error code.

 

I've tried adjusting the SCLK rate to values as high as 8MHz to as slow as 1MHz (I had heard that slowing the clock rate down could ensure more reliable signal transfer) but I still get the same result.

 

Please advise. I can post code and logic analyzer outputs if needed.

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