PCM codec power supply sequence

Technical Subjects
1

The EC200T talks about Power Supply for PCM Codec:

Captura de pantalla 2022-01-30 a la(s) 8.01.21 a. m.

To power on sugest power on 1.8v and then power on 3.3v

What happens if power on both power supplys at same time?

Best regards,

Nelson

2

It may cause the Codec chip to not work properly. It is recommended to apply 1.8V first and then 3.3V.

3

I can apply 3.3v and 1.8v at same time and then restart PCM codec with software command?

4

I think it’s ok, you can try it once. Or use our recommended reference circuit to design.