ADS7828-Q1: What is the current sinking capability of the SDA and SCL lines?

Ashiful Khurashi

Prodigy 40 points

Part Number: ADS7828-Q1

Hello,

What is the maximum current sinking capability of the SDA and SCL lines?

over 3 years ago

0 Aaron Estrada over 3 years ago

TI__Mastermind 22950 points

Hi Ashiful,

We don't specify a maximum but the Vol spec has a 3mA current sink condition. May I ask why this condition is needed? Are you trying to size the pull-up resistors?

Regards,
Aaron

0 Ashiful Khurashi over 3 years ago in reply to Aaron Estrada

Prodigy 40 points

Hi Aaron. Yes, we need to know the maximum current sinking capability because we are planning to use less than 1kOhm pull-up resistors. The system has other devices on the I2C lines and we need to go below 1kOhm to ensure we have proper raise time.

+1 Aaron Estrada over 3 years ago in reply to Ashiful Khurashi

TI__Mastermind 22950 points

Hi Ashiful,

Apologies for the delayed response. I was able to discuss this with the team and the absolute maximum current sink for the I2C pins is 10mA. Since this is an Abs Max condition, we recommend to keep the current on I2C pins < 10mA if sustained use is required.

Regards,
Aaron Estrada

0 Ashiful Khurashi over 3 years ago in reply to Aaron Estrada

Prodigy 40 points

Thanks!

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ADS7828-Q1: What is the current sinking capability of the SDA and SCL lines?