INA214: Is output above V+ possible?

Yongki Jeong1

Part Number: INA214

Hi Ti team

For example, if i read the measured value below using INA214, will the output be 10V?
1. V+ = 3.3V
2. IN+ = 9V
3. IN- = 8.9V

Regards.

Jeong.

8 months ago

0 Clemens Ladisch 8 months ago

Guru 284990 points

No, the outputs cannot drive a voltage beyond the supply rails (see figure 5-10). Use a smaller gain or a higher supply.

0 Louis L 8 months ago

TI__Expert 4330 points

Jeong,

Thanks for the question and using the E2E form.

Clemens is correct, the output cannot swing beyond the supply rails. The output is actually limited to this line in the datasheet.

In your example of having 100mV between the inputs, you'd need to either increase the supply voltage or choose a smaller shunt resistor such that the voltage drop is less than 100mV.

Please let us know if you have any other questions.

Louis

0 Yongki Jeong1 8 months ago in reply to Louis L

Intellectual 535 points

Hi, Louis and Clemens

Thank you for your kind reply.

So, is there no damage to the IC when the calculated output is well above the supply rail?

Regards.

Jeong

0 Louis L 8 months ago in reply to Yongki Jeong1

TI__Expert 4330 points

Jeong,

That's correct. There won't be any damage, and the output will go as high as it can before it hits its limitations I pointed out above.

Louis

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INA214: Is output above V+ possible?