1, By the diagram of the Datasheet, the distortion range is very small (less than 0.1% distortion below 1V). In the debugging, When the output amplitude is less than 1V, distortion is more than 1%, is it normal?
2. When the output amplitude exceeds 1.4V and the voltage is boosting, the distortion is only 0.2%. After the boost is turned off, the distortion gradually increases to about 3.2%. Is it normal?
3. When the input noise 4uV, the output of the power amplifier 35uV normal. Is it normal?
4. The following is the schematic diagram of TPA2015D1. Could you please check whether it is correct?