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TAS2505-Q1: Noise observed immediately after DAC initialized in speaker OUT end even when no data in I2S input lines

Part Number: TAS2505-Q1


Hi Team,

We would like to ask your help regarding the noise issue of the TAS2505-Q1 in one of our customer's project. According to our customer,

We are using DAC "TAS2505-Q1" for one of our programs to play sound in speaker.

Following is the sequence in which we initialize DAC.

Observation is once DAC initialized(after '
SPK powered up' stage), we could see noise in speaker OUT end.

Attached the speaker OUT image captured after DAC init,  before sending any data in I2S lines. 

Can you please help us to understand, why data are observed in Speaker out line, immediately after DAC initialisation even when no data is input to DAC in I2S lines.

Initialization sequence.xlsx 

Regards,

Danilo