Forum Post: RE: TLV320AIC10

Hi,

I am still Trying to improve voice quality in my design. I have also tried the digital loop back options in TLV320AIC10. The following are the experiments i have done -

1. TLV320AIC10 in digital loop back with ADC channel disabled. (i,e Cntrl Reg3 = 0x0683)
   • My observation: Slight, motor booting kind of noise at the speaker driven by OUTP of AIC. Also a hissing sound is heard.
2. TLV320AIC10 in digital loop back with DAC channel disabled. (i.e Cntrl Reg3 = 0x0685)
   • Mt observation: Hissing noise reduced but motor booting sound is heard predominantly. The motor booting noise changing when there's data on DIN....!!!???

I suspect that, there's some thing to do with digital noise which is making its way into the coding and decoding process of AIC.

How to address this issue. What are the cares need to be taken to handle digital noise while using TLV320AIC10.

Please some one help me out.

Thanks & Regards,

Srikanth.