How to use PCM5102 to apply the external negative voltage without internal Charge-Pump.

Tsuguhiko Asai

Expert 1260 points

Other Parts Discussed in Thread: PCM5102

Hello,

Let me ask about how to use PCM5102.

Is there the method not to go by way of the Charge-Pump of the internal organs in this device?

If there is it, please teach a procedure and a setting method to us.

As an example

CPVDD :3.3V

CAPP :Open

CAPM :Open

VNEG :-3.3Vinput (from external)

because negative voltage supply is generated with this device via a Charge-Pump, from a datasheet of PCM5102,

user expects that output sound quality may include adverse effects.

Best Regards,

Tsuguhiko Asai

over 11 years ago

0 Don Dapkus over 11 years ago

TI__Guru**** 189399 points

Hi, Asai-san,

That is an interesting proposal. We are studying it for you.

-d2

0 Patrick Galvin over 11 years ago in reply to Don Dapkus

TI__Genius 16270 points

Asai-san,

Even though VNEG is being driven externally, this would still cause issues for the chip internally, so this operation is unfortunately not recommended.

0 Tsuguhiko Asai over 11 years ago in reply to Don Dapkus

Expert 1260 points

Dear Don-San,

Thank you very much for kindly responce.

We wait for your answer.

Best Regards

Tsuguhiko Asai

0 Tsuguhiko Asai over 11 years ago in reply to Patrick Galvin

Expert 1260 points

Dear Patrick-San,

Thank you very much for your kindly responce.

We take your answer into account for customer.

Best Regards,

Tsuguhiko Asai

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How to use PCM5102 to apply the external negative voltage without internal Charge-Pump.