INA233: input bias current equal on both inputs?

Stefan Lintner

Part Number: INA233

Hi Team,

Can I assume that when I measure the input bias current on the positive input of a device, the input bias current on the negative side will be equal?

Thank you!

BR,
Stefan

over 2 years ago

+1 Castrense Nigrelli over 2 years ago

TI__Expert 4720 points

Hello,

Yes that would be a good assumption.

Regards,

Castrense

0 kai klaas69 over 2 years ago

Guru 140200 points

Hi Stefan,

the difference of input bias currents between the two inputs would be the so called "input offset current" and - to be honest - this input offset current isn't specified in the datasheet of INA233. So it cannot be guaranteed that the two input currents are equal. Similar, but not necessarily identical.

Also notice, that no maximum values for the input bias currents are given in the datasheet. Only typicals.

Kai

0 Castrense Nigrelli over 2 years ago in reply to kai klaas69

TI__Expert 4720 points

Hello,

Kai is correct there is no datasheet specification as well as them being similar, but not necessarily identical.

Regards,

Castrense

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INA233: input bias current equal on both inputs?