INA230: ALERT PIN

Hello Kim,

Here are my responses to your questions:

kim kwangsu said:

I checked the datasheet, but is it possible to receive current data and voltage (bus) data without using the alert pin?

Yes, the ALERT pin is disabled by default, and will not be used unless setup in the Mask/Enable Register.

kim kwangsu said:

Since I will not be using the alert pin, I will leave it in a floating state.

Yes, this is fine to do.

kim kwangsu said:

And I have a question regarding the relationship between ADC conversion time and AVERAGE in the INA230.

Specifically, I would like to understand how these factors affect the polling speed of the communication.

The conversion time is how long a specific measurement is taken, while the average is how many measurements to take (and average) before reporting the value to the results register.  Figure 8-1 from the datasheet shows how this timing works:

So in terms of polling the device for results, you will need to add the conversion time of shunt and bus measurements, then multiply by the number of averages. That is how often the results will be ready in the register. 

Regards,

Mitch