About Audio Codec (SGTL5000)

[okamotosatoshi]

Hello.

I want to check about Audio Codec.

use device:SGTL5000XNAA3

Connection of the power supply are shown in the following.

PMIC(MMPF0200)                Audio Codec(SGTL5000XNAA3)

VGEN4(1.8V)           --->      VDDIO

VGEN4(1.8V)           --->      VDDD

SW2(3.3V)                --->      VDDA

VGEN4 power is about 2.6V When you work the audio codec.

Before working the audio codec, VGEN power holds the 1.8V.

What you want to check is the following three points.

1.VDDIO and VDDA is no issue even if a different voltage?

2.Do you need something set in order to supply the 1.8V from the outside to the VDDD?

　(For example, the setting of the audio codec)

3.it is considered that is affected the VDDIO power supply due to  for the setting of the register?

Regards,

-satoshi

[art]

1. It is possible to supply VDDIO and VDDA with different voltages. However, both voltages must remain within 1.8V to 3.6V margins.

2. No special register settings are required to supply the VDDD voltage externally.

3. Please note that the VDDD voltage must not exceed 2.0V in any conditions, so, an external power supply for VDDD must initially provide the voltage lower than 2.0V.

Have a great day,
Artur

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[okamotosatoshi]

Hello.

Thank you for your reply.

1.VDDIO = 1.8V, VDDA = 3.3V, VDDD = 1.8V, there is no issue ?

   In the data sheet, but I only example of a common power supply voltage What okay ?

2.Internal regulator would be better that you disabled ?

Regards,

-satoshi

[art]

1. Yes, this configuration is OK.

2. Yes, you are right, it's better to disable internal VDDD regulator when supplying the VDDD voltage externally.

Best Regards,

Artur

[okamotosatoshi]

Hello.

Thank you for your reply.

The problem is resolved.

VDDIO was the cause that has become a 3.3 million in the driver settings.

It was operating normally by changing the settings of VDDIO to 1800000.

VDDD regulator was also disabled.

Regards,

-satoshi