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ADAU1372 ADC Polarity

Question asked by analog_engr on Nov 9, 2015
Latest reply on Nov 9, 2015 by DaveThib

I have programmed the ADAU1372 using the talkthrough mode and has configured the input as single-ended input with PGA powered down. I have injected a test audio signal for checking polarity and has discovered that the audio signal is inverted at the line output of the ADAU1372. The DAC is configured as normal polarity.

The datasheet states that single-ended input are not inverted and that the ADCs are non-inverting (see page 28). Why is it that the output that I observed on the oscilloscope is inverted? Is there an errata for this ADAU1372 or am I missing out on something?

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