PCM2902C: SPDIF to ANALOG with volume Control

Davide Ballo

Intellectual 550 points

Part Number: PCM2902C
Other Parts Discussed in Thread: DIR9001, TAS5756M

Hello,

I need to use the PCM2902C without USB.

This device have a volume control and SPDIF input that is great for my application.

Is it possible to use this device for convert the SPDIF signal to analog and use the HID function for volume control?

Thanks.

Best Regards,

Davy

over 7 years ago

0 Diego Melendez over 7 years ago

TI__Guru 57800 points

Hi, Davide,

Unfortunately, it is not possible to use the PCM2902C without USB interface. The S/PDIF input is internally mapped to the audio out which goes to the USB host. The S/PDIF output streams the same content of the analog output, which comes from the USB interface.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Davide Ballo over 7 years ago in reply to Diego Melendez

Intellectual 550 points

Hi Diego,

thanks for your reply.
Can you suggest me a solution?

I think to use a DIR9001 to convert s/pdif to I2S and a TAS5756M as volume control and amplifier.

What do you think about that?

Thanks.

Best Regards,
Davy

0 Diego Melendez over 7 years ago in reply to Davide Ballo

TI__Guru 57800 points

Hi, Davy,

Thanks for the feedback. Your solution seems suitable, please just consider that the TAS5756M does not have hardware-controlled volume control.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Davide Ballo over 7 years ago in reply to Diego Melendez

Intellectual 550 points

Hi Diego,

thanks for your reply. Yes, I read the datasheet and the volume must be controlled via I2C.

Thanks again.

Best Regards,

Davy

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PCM2902C: SPDIF to ANALOG with volume Control