Hi,
It is a normal behavior on the UDA1334TS that the audio voltage drops after power-on.
We have never measured this before, but we made some measurements tests on the UDA1334 Power ON and noticed same behavior as you seen that audio output voltage is dropped.
According to our measurements, the voltage drop is caused after power on:
After Power ON and first BCK appear, we did not see voltage drop at OUTL, see below:
Have a great day,
Jose
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