INA700: Ambient Temp

Ohad Bonneh

Intellectual 2660 points

Part Number: INA700

Tool/software:

Hi Team,

I see that the INA700 enables us die temperature measurements,

is there also a possibility for ambient temp?

best regards.

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 326900 points

No, there is no mechanism to connect an external temperature sensor.

0 Ohad Bonneh over 1 year ago in reply to Clemens Ladisch

TI__Intellectual 2660 points

Thanks for your swift response.

I'd like to verify that we read and calculate the temperature correctly.

We are using the following formula for the calculation: Temperature_Reading(dec)* 125 m°C/LSB – please confirm.

The strange thing is that we receive very high temperature after the calculation, like around 500degC.

Is this coefficient 125 m°C/LSB correct?

0 Guang Zhou over 1 year ago in reply to Ohad Bonneh

TI__Mastermind 36810 points

Hi,

The die temperature register needs to right shift by 4 bits (the last four bits are all zeros) before converting to degree C. Alternatively you could keep the 15-bit reading but use LSB of 7.8125mC instead.

The datasheet alluded to this in the example in section 8.1.1. We probably should have made it clearer in other places

Regards

Guang

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INA700: Ambient Temp