INA138: Overvoltage input protection for INA138

Barney

Part Number: INA138

I am looking at a situation where a voltage may be present at the inputs (Vin+ and Vin-) while the part is powered down (V+ = 0).

Does this part have overvoltage protection for this situation? If not, how can I add protection for this case?

Thanks

over 2 years ago

0 kai klaas69 over 2 years ago

Guru 140200 points

Hi John,

this might interest you:

https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/237151/ina138

Kai

0 Javier Contreras4 over 2 years ago in reply to kai klaas69

TI__Mastermind 29600 points

Hello John,

Kai is correct in pointing you to that post. The best place to see this information and if the inputs can go beyond the supply voltage is looking at the Absolute Maximum Ratings. Most of our current sense amplifiers have input stages that allow for the input voltages to go beyond the Vsupply.

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INA138: Overvoltage input protection for INA138