INA4230: Floating inputs

Austin Allen

Intellectual 2575 points

Part Number: INA4230

Tool/software:

If not all inputs of INA4230 are used, what is best to do with unused inputs?

Thanks,

Austin Allen

7 months ago

0 Mallika Senthil 7 months ago

TI__Expert 8970 points

Hi Austin,

Best practice would be to tie the inputs together and connect them to GND via a resistor.

Best,
Mallika Senthil

0 Austin Allen 7 months ago in reply to Mallika Senthil

TI__Intellectual 2575 points

Hey Mallika,

Thank you for the response. And to confirm, this would not accidentally trigger the ALERT output?

Any recommendation for the resistor sizing? Any expected leakage or anything here?

Thanks!

Austin Allen

0 Mallika Senthil 7 months ago in reply to Austin Allen

TI__Expert 8970 points

Hi Austin,

No it shouldn't trip the ALERT and I don't except there to be any leakage. The resistor is optional, you can tie the inputs to GND without a resistor as well. Generally, 1k resistor should suffice.

Best,
Mallika Senthil

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INA4230: Floating inputs