INA237: The rise time of I2C Bus

Silvia Gao

Part Number: INA237

Hi team,

The datasheet shows the maximum value of rise time is 300ns. Is there any application risk when the rise time reaches 500ns under 100kHz frequency?

Best Regards

Silvia Gao

0 Clemens Ladisch over 1 year ago

Guru 281530 points

This value was just copied from the I²C specification, and shows that the INA237 is compatible with it.

I expect that 500 ns will work. But there is no guarantee.

0 chuncheng li over 1 year ago in reply to Clemens Ladisch

Hi Clemens,

Did Ti test the INA237 for this? What the max rise time is accepted when the INA237 working under 100KHz SCL？ Thanks.

0 Mohamed Hamida over 1 year ago

Hi SIlvia,

As Clemens explained, it is possible. However, I would not recommend exceeding datasheet specifications as it could produce unpredictable behavior.

Best,

Mohamed

0 Silvia Gao over 1 year ago in reply to Mohamed Hamida

Hi Clemens and Mohamed,

Could you please help answer the customer's question?

chuncheng li said:
Did Ti test the INA237 for this? What the max rise time is accepted when the INA237 working under 100KHz SCL？ Thanks.

Best Regards

Silvia Gao

+1 Mohamed Hamida over 1 year ago in reply to Silvia Gao

Hi Silvia and Chungcheng,

No, the INA237 is not tested under that frequency, so it is best to stay within datasheet specifications for predictable results.

Best,

Mohamed

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