PCM2912A: Could you review customer's schematic for PCM2912A?

Downey Kim

Expert 2675 points

Part Number: PCM2912A

Hi TI experts,

Could you review customer's schematic for PCM2912A?

PCM2912A_schematic.pdf

They don't use audio out. Only micro input is used.

Please review if there is anything to modify.

Thank you.

over 3 years ago

+1 pdjuandi over 3 years ago

TI__Mastermind 29745 points

Hi,

My comment:

Remove the line here

Change C108 to 1uF
MMUTE place option to mute/unmute (LOW: Mute off, HIGH: Mute on)
Check this as it's not matching the connection and comment.

Regards,

Peter

0 Downey Kim over 3 years ago in reply to pdjuandi

Expert 2675 points

Hi Peter,

Thanks for your comment.

Customer need 2 mic input. but Mic input(ADC) of PCM2912A is 1ch.

If the line removed, Mic_R input cannot be received.

Please recheck it.

Thanks.

0 pdjuandi over 3 years ago in reply to Downey Kim

TI__Mastermind 29745 points

Hi,

Sorry this is MICBIAS, you should keep this connection.

I was looking at this text as MICR and MICL connection in the schematic.

Regards,

Peter

0 Downey Kim over 3 years ago in reply to pdjuandi

Expert 2675 points

Hi Peter,

Thanks for check it.

Customer will not use Headphone out. so VCCA, VCCR, VCCL and VOUT L,R is floating.

Is it okay to floating?

Thank you.

+1 pdjuandi over 3 years ago in reply to Downey Kim

TI__Mastermind 29745 points

Hi,

VCCA is analog power supply and needs cap, the rest you can leave it floating.

Regards,

Peter

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PCM2912A: Could you review customer's schematic for PCM2912A?