• State Resolved
  • Replies 3 replies
  • Subscribers 47 subscribers
  • Views 74 views
  • Users 0 members are here
Support feedback
Options
Options
Related

TLV9030: Input pins (IN+, IN–) goes outside abs max but small current is it safe?

Arturo Bayangos
Prodigy 10 points
Part Number: TLV9030

Tool/software:

Hi,

For our application, the (IN-) goes to about -700mV to -800mV. However due to our circuit configuration, the current though the (IN-) should be less than 10mA.

So is it ok that we are exceeding -300mV as per abs max if the current though (IN-) is limited below 10mA?

Thanks,

Arturo

  • +1
    Guru 317370 points

    Yes, this will not damage the device.

    (When an input voltage is outside the recommended input voltage range, correct operation is not guaranteed.)

  • +1
    TI__Guru 60806 points

    Hi Arturo,

    While it may not cause damage, there is the possibility of a false output if you go that low.

    As TI, we cannot condone violating the -0.3v specification  - so I cannot say -0.8V is okay. And I am not comfortable with -0.8V, as you are getting into reversal territory.

    Proper operation is only warrantied to -0.2V.

    This is a confusing spec as violating either 10mA or -0.3V violates the Abs max...so technically you cannot violate the 10mA without first violating the -0.3V limit. To get to 10mA, you need to be at almost -850mV.

    TI recommends using external clamping or attenuating to not violate the -0.3V, and limiting the current to less than 1mA.

  • 0 in reply to Paul Grohe
    Prodigy 10 points

    Hi everyone,

    Thanks for the fast response!

    I will take your comment into consideration. Thanks very much!