TAS5441-Q1: About I2C at no use I2C

Tao_2199

Genius 5740 points

Part Number: TAS5441-Q1

Tool/software:

Hello,

My customer is asking about I2C in TAS5441-Q1.

1) What will the default gain setting be at no use I2C(no microcontroller in the system) ?

In case of using I2C, the default gain setting is below.

Is setting of no use I2C same as using I2C case?

2) From 6.3 Recommended Operating Conditions(page 4),

they are understanding there no problem the maximum voltage on the I2C pin is 5V.

Their understanding is correct.?

(I think 5V on the I2C pin is problem because of absolute maximum rating.)

3)According to datasheet(8.2.2.1.3 I2C Pins: pase24), it is described to If there is no microcontroller in the system,

connect the SDA and SCL pins to 3.3 V.

Same as question (2),in this case, is there no problem to connect the SDA and SCL pins to 5V for no use I2C?

Regards,

Tao_2199

27 days ago

0 Gregg Scott 27 days ago

TI__Mastermind 37915 points

Hi,

I will use your question numbers for reply.

In non-I2C mode, 26dB as gain.
The abs max voltage on the I2C pins is 5Vdc. The SDA and SCL can use 5V I2C.
The pins can be connected to 5Vdc when I2c is not used.

Regards,
Gregg Scott

0 Tao_2199 22 days ago in reply to Gregg Scott

Genius 5740 points

Hello Gregg,

Thanks answering.

About question (2);
>The abs max voltage on the I2C pins is 5Vdc. The SDA and SCL can use 5V I2C

Does this device have margin of abs max voltage? (ex,5V + 0.xxV)
Or we should keep 5V or less?
I ask it just in case.
(Because I understand the abs maximum voltage of general device should not exceed that voltage.)

Regards,
Tao_2199

0 Gregg Scott 22 days ago in reply to Tao_2199

TI__Mastermind 37915 points

Yes, there is margin. They should keep their 5Vdc at 5Vdc.

Regards,
Gregg Scott

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TAS5441-Q1: About I2C at no use I2C