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1452 Eval Board Analog Output Levels limited to about 2.5Vp-p

SigmaDSP & SigmaStudio MCSP Mar 27, 2021 00:00 1 replies Original on forum ↗
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MCSP Question
Mar 27, 2021 00:00

The analog audio outputs of the 1452 eval board are driven by AD4841 opamps.

The supply rails of these output opamps is the 5v_unreg (which I measured on my eval board to be 6.2VDC).

These outputs are swinging symmetrically but are limited at about 2.5Vp-p.

I had hoped [and expected] that this output would swing closer to the 5V rails, but perhaps this is limited by the DAC output and the unity gain of the output filters.

Regards,

M

Audio Signal Processors

adau1452

sigmastudio

SigmaDSP Audio Processors

audio

MCSP Reply
Mar 27, 2021 00:00

Ok; so I read the manual now (I did before but forgot!) that specifically states that the 'Stereo Line Outputs' are configured for 2.8Vp-p output.