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SGTL5000  LINE input  noise

Question asked by Tommy-A on Apr 14, 2015
Latest reply on May 5, 2015 by Artur Petukhov

Our customer use SGTL5000 with i.MX6.

The LINE input pull down to GND and they measure LINE out.(ADC in => DAC out).

It is measured noise on 7kHz at sampling frequency of 44.1kHz, but there is no noise at sampling frequency of 48kHz.

Please tell me the countermeasures of noise at ADC input.