INA700: Why does gain error increase with current?

Zach Kimble

Intellectual 1980 points

Part Number: INA700

Tool/software:

Hello,

Figure 7-2 in the datasheet shows that the gain error increases with shunt current. Why is the gain error affected by the shunt current? What can be done to minimize this?

Thank you!

Best regards,

Zach Kimble

9 months ago

+1 Mallika Senthil 9 months ago

TI__Expert 8220 points

Hi Zach,

Since the INA700 has an integrated shunt, we see the gain error increasing with shunt current due to the heating effect of the shunt. The only way to work around this is to limit the current as suggested in the datasheet.

Best,
Mallika Senthil

0 Zach Kimble 9 months ago in reply to Mallika Senthil

TI__Intellectual 1980 points

Thank you Mallika!

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INA700: Why does gain error increase with current?