PCM1802: What is the actual bit depth of the ADC?

Jan Polivka

Part Number: PCM1802

Hello,

I am trying to interface the PCM1802 with Arduino MKR1000 and read the I2S bus with one those very cheap logic analyzers. I know the ADC is supposed to be only 24-bit but when I initiate the Arduino as an I2S slave at 24 bits, the I2S does not get initialised. However it does when I set it to 32. Furthermore, when I analyse the signals under 32, LRCLK is 48KHz (Expected) and the CLK is around 3MHz.

I am confused what is the actual work bit depth?

Regards,

Jan

over 5 years ago

0 Diego Melendez over 5 years ago

TI__Guru 57800 points

Hi, Jan,

Sorry for the late response. My colleague in charge of this part has been notified.

I think the bit depth of this device is 24, but a 32×Fs bit clock is required for the normal operation of the ADC, my colleague can confirm or clarify this assumption.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Jan Polivka over 5 years ago in reply to Diego Melendez

Prodigy 230 points

Morning Diego,

yea, I've managed to figure it out and forgot about this thread.

Thanks anyway!

Jan

Audio

Audio forum

PCM1802: What is the actual bit depth of the ADC?