INA237: Requesting for internal resistance value

Vatsala Balol

Part Number: INA237

Hi,

I wanted to know the internal resistance value of INA237AIDGSR for calculating Rs value.For your reference attached a snapshot.

Thank you,

Vatsala Balol

over 3 years ago

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Vatsala,

don't overlook the box called "Bias". This "bias" cicuitry demands to limit R_S, not necessarily R_INT.

Kai

0 Mitch M over 3 years ago

TI__Mastermind 30525 points

Hello Vatsala,

We cannot give out exact values for these resistors, however, Kai is correct that the input bias current is a more important factor for these resistor sizes. In general, you want them as low as possible, but this part can handle a higher value because it has such low input bias current (you will see many of our other devices suggest a maximum of 10Ω).

Here is a link to a TI Precision Labs video about input filter error: https://training.ti.com/input-filter-error.

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INA237: Requesting for internal resistance value