I have 3 question in PCM6240 datasheet,
1) In the table, the PSRR is 92dB at 1kHz.
But in the picture, the picture displays can't reach the limit.
I want to test this parameter, could you tell me how to test, especially in the DC-coupled differential microphone input(INxP=6V and INxM=2V)?
2) In the table, the CMRR is 70dB at 1kHz.
Is this parameter tested in DC-coupled differential microphone input?
And could you tell me how to test?
3) In P22, the x-axis in the curve of THD+N vs Input Amplitude can reach to -12dB,
why this input amplitude can reach 0dB, because the nom value is 10Vrms for microphone input in the table of P14.