Dear Team:
Our customer used LM49450 in smart monitor, butgot ESD test failed, when ESD test +/-15kV, the audio speaker out got audio noise continuous. We have checked the ESD energy coupling to I2S bus as attachedfile.
When we added 2 pcs 220pf capacitors to ground at MCLK, the ESD test is passed. But the MCLK waveform is distortion as attached, the audio play also well.
Could you confirm whether MCLK is ok for this kind of adjustment?
