PCM1862-Q1: Design issue of a audio card for pine64

Adnan Sahin

Part Number: PCM1862-Q1
Other Parts Discussed in Thread: PCM1862, PCM1860

Hello.

I am trying to desing a audio card to use with pine64 ( www.pine64.org/

I am thinking to use PCM1862-Q1 IC(www.ti.com/.../pcm1865-q1.pdf schematic on page 23).

I will give audio data (a mixer output) to this IC and connect the IC to the pine 64 board via IS2 pins (XO-BUF, SCKI, LRCK, BCK, DIN, DOUT).

Then I will broadcast this audio on internet using pine64.

My expectation with the Audio IC is SNR>100db and ADC Sample rate is minimum 192kHz.

Is this IC and circuit is proper for me? Will I need extra software for this job?

Best regards.

Adnan

over 6 years ago

0 Diego Melendez over 6 years ago

TI__Guru 57800 points

Hi, Adnan,

Welcome to E2E, Thanks for your interest in our products!.

The PCM1862 can be used for this application without issues. If you don't need special processing or mixing capabilities on the ADC, probably you could use the hardware version of the PCM1862, PCM1860, which doesn't require software configuration.

Please also consider that the input full-scale voltage value of the ADC is suitable for your application.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Adnan Sahin over 6 years ago in reply to Diego Melendez

Prodigy 45 points

Hello.

Thank you for your reply.

I started to my design.

I made the connections as in the attachement. Is it possible for you to chechk the connections are correct?

0 Diego Melendez over 6 years ago in reply to Adnan Sahin

TI__Guru 57800 points

HI, Adnan,

The connections seem correct.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Adnan Sahin over 6 years ago in reply to Diego Melendez

Prodigy 45 points

Hello.

Thamnk you very much for your answer.

Best regards.

Adnan SAHIN

www.pcbtasarim.com

0 Adnan Sahin over 6 years ago in reply to Diego Melendez

Prodigy 45 points

Hello. Do I need to seperate the GND of Audio circuit and PINE64 side?

Or is it appropriate to use common GND for all the circuit?

0 Diego Melendez over 6 years ago in reply to Adnan Sahin

TI__Guru 57800 points

Hi, Adnan,

It is appropriate to use the same ground for all the circuit, actually it is recommended to use the same ground plane for analog and digital sections of the circuit. Please refer to section 12.1.1 of the datasheet for additional information about grounding recommendations.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

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PCM1862-Q1: Design issue of a audio card for pine64