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INA149-EP: INA149-RP Common-mode voltage protection

nicolas MARTI
Prodigy 10 points
Part Number: INA149-EP
Other Parts Discussed in Thread: INA149

Hi,

We currently use INA 149 in our front-end and we rely on the "500V for 10s" characteristics to withstand lightning surge residual voltage.

Indeed, our customer has increase the surge voltage and i'd like to know what is the real factor limiting the protection to 500V. Current ? Dielectric contraints ?

In other way, if i respect the 10mA constraint, is the device able to withstand, let's say, 750V ? 

thanks

Regards

  • 0
    TI__Genius 14540 points

    Hi,

    I am trying to track down the original design group of the INA149 to see if they can provide any information.  In general, any violation of the absolute maximum specifications is a risky proposition as these specs already exceed the recommended bias conditions for which the device is tested and guaranteed.  In addition, although the device may remain functional after violating the absolute maximum specs, the reliability and lifetime of the device could be negatively impacted.

    If I receive any further information I will pass it on to you.

    Kind Regards,

    Christian