INA226: consultation（the current detection accuracy of INA226）

Jack Su1

Intellectual 300 points

Part Number: INA226

How many （uA） is the current detection accuracy of INA226? And what's the test range?

over 4 years ago

0 kai klaas69 over 4 years ago

Guru 140200 points

Hi Jack,

the input bias current is shown in figure 12 and 13 of datasheet. For a precise measurement you measuring current should be some orders of magnitude higher.

What current do you want to measure?

Kai

0 Javier Contreras4 over 4 years ago

TI__Mastermind 32700 points

Hello Jack,

Beside what Kai mentioned you need to look at the VOS of the device along with the Rshunt you are using. Most likely the input bias current could be the largest contributor of error. Just as an FYI the input bias current will flow input each input pin and the current of IN- will flow through your Rshunt.

0 Jack Su1 over 4 years ago in reply to kai klaas69

Intellectual 300 points

Thanks Kai

0 Jack Su1 over 4 years ago in reply to Javier Contreras4

Intellectual 300 points

Thanks Javier

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INA226: consultation（the current detection accuracy of INA226）