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question regarding the analog section of ADuCM360

Question asked by dinrail on May 6, 2013
Latest reply on May 10, 2013 by AudeR

1) Is the analog section supplied by 1.8V or 3.3V? (I assume 1.8 since VBias is normally at 0.9V)

 

2) VBias output swings big time when the input goes below 0V, why doesn't it hold at 0.9V?

 

3) I supply the Vref of 0.5V, but notice the signal lost its linearity near the rail (see attachment) at gain of 1, other gains are fine, is it normal?

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