INA238: 100k I2C requirement

Naizeng Wang

Expert 4540 points

Part Number: INA238

Tool/software:

Hi team,

Is there I2C requirement for 100kHz?

2 months ago

0 Clemens Ladisch 2 months ago

Guru 270260 points

The specified minimum is 1 kHz.

Why do you think that a 100 kHz master would not be compatible with this?

0 Mallika Senthil 2 months ago

TI__Intellectual 1530 points

Hi Naizeng,

The timing requirements listed in the datasheet hold good for any I2C clock frequency between 1 - 400 kHz.

Best,
Mallika Senthil

0 Naizeng Wang 2 months ago in reply to Mallika Senthil

TI__Expert 4540 points

Hi Mallika,

there is fast mode as well as high speed mode in datasheet. 100khz is between 1 - 400 kHz, also it is between 10khz-2940khz, which timing requirement should I follow?

0 Clemens Ladisch 2 months ago in reply to Naizeng Wang

Guru 270260 points

Fast-mode timings are more strict than Standard-mode. Your 100 kHz master will work with the INA238 (or any other Fast-mode device).

0 Mallika Senthil 2 months ago in reply to Naizeng Wang

TI__Intellectual 1530 points

Hi Naizeng,

I agree with Clemens, I'd suggest you follow the fast mode requirements.

Best,
Mallika Senthil

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INA238: 100k I2C requirement