INA282 output with zero current through Rsens

Steve Sinn

Other Parts Discussed in Thread: INA282

I am looking for the output voltage of the INA282 when no current is flowing through the Rsense resistor. Can someone point me to that parameter in the datasheet?

over 9 years ago

0 Jamieson Wardall over 9 years ago

TI__Intellectual 1385 points

Hi Steve,

What voltage are REF1 and REF2 at?

For the typical INA282 application with Vout=(1/2)*V+ for Isense=0A:

REF2=V+

REF1=GND

Vo= (Isense*Rsense*50)+(1/2)*V+

Isense=(Vo-(1/2)*V+)/(Rsense*50) This is for current flowing from IN+ to IN- through the shunt.

Example:

Isense=0A

REF2=+5V

REF1=GND

V+=+5V

Vo=+2.5V

Regards,

Jamieson Wardall

Sensing Applications

0 Steve Sinn over 9 years ago in reply to Jamieson Wardall

Intellectual 425 points

Excellent, thanks. I see it now.

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INA282 output with zero current through Rsens