INA180: Gain Error Factor

NAOKI AOYAMA

Guru 11215 points

Part Number: INA180

Hello,

Our customer use the INA180.

The customer apply a filter at the input pin. The customer calculate Gain Error Factor using

equation 4, have a question.

What does it mean "1250" at the equation 4?

Best Regards,

Naoki Aoyama

over 7 years ago

0 Carlos Silva85 over 7 years ago

TI__Expert 4915 points

Hi Naoki,

Thank you for posting on the E2E Forums.

There is internal resistor of value 1.25K (fixed value for all gains) which comes to play when external series resistor is connected.
Since the value is constant, we keep it as 1250 in the equation rather than referring it as another variable.

0 NAOKI AOYAMA over 7 years ago in reply to Carlos Silva85

Guru 11215 points

Hi Carlos,

Thank you for your reply.
I understood the equation 4.

Thanks,

Naoki Aoyama

Amplifiers

Amplifiers forum

INA180: Gain Error Factor