• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 49 subscribers
  • Views 1028 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TLV2372 Negative Supply

Jon4269
Intellectual 1870 points
Other Parts Discussed in Thread: TINA-TI, TLV2372

If the TLV2372 is simulated as a current sense amplifier (Using Tina-TI).  When the OPA GND = 0V and Vsense offset = -1V, that means the signals at the OPA input are negative, the OPA still works normally with a single power supply.

 

          If this is true in the real world, I do not need negative supply for the OPA.  Can you please confirm whether or not I need negative supply>

 

          I appreciate your help.

-J

  • 0
    Expert 2400 points

    Hi,

    The datasheet tells on page four (absolute maximum ratings): input voltage range -0.2 V to VDD+0.2 V. Hence, it might work in the simulation but in the real world things will be different. I suggest to think about a different circuit which does not need negative input voltages.

    Best regards,
    Edwin Krasser

  • 0 in reply to Edwin Krasser
    Guru 21975 points

    J,

    Edwin is correct, the TLV2372 cannot be used 1V below the rail voltage. The macromodel for this device is an older type that does not accurately model the device behavior with inputs below the negative rail.

    Regards, Bruce.

  • 0 in reply to Bruce Trump
    TI__Intellectual 1870 points

    Hi Guys,

     

    Thanks for your help - will we have new TI models to fix this issue?

     

    -J

  • 0 in reply to Jon4269
    TI__Guru* 93105 points

    Jon,

    I will forward the information about the TLV2372 simulation model to the eLab group which maintains older simulation models such as this one. They are working on developing simulation models for many of our older, linear products that currently do not have one. They would determine where to fit this request into the queue.

    Regards, Thomas

    PA - Linear Applications Engineering