• State Resolved
  • Replies 3 replies
  • Subscribers 46 subscribers
  • Views 42 views
  • Users 0 members are here
Support feedback
Options
Options
Related

INA236: Clarification on INA236EVM sensing ranges and maximum current consumption

Sebastian Cardona Ramirez
Prodigy 70 points
Part Number: INA236
Other Parts Discussed in Thread: INA232

Hello,

After reviewing the datasheet of the INA236 and the User’s Guide for the INA232/234/236EVM, I would like to confirm a few points. It is not entirely clear to me what the operating ranges are for the parameters that the evaluation board is designed to measure (current, voltage, and power).

I would like to know if the factory default values of the EVM can be directly used for my application. In my current system, the operating parameters do not reach those limits, but they might in future versions. If any adjustment is required for proper operation within my design, I would appreciate your guidance.

Additionally, I would like to confirm the maximum supply current consumption of the INA236, since I need this information to correctly define the power tree for my system. I could not clearly identify the reference current value to consider for this device.

Thank you in advance for your help and clarification.

Best regards,
Sebastián Cardona Ramírez

  • +1
    TI__Mastermind 34660 points

    Hi,

    Maximum supply current consumption of the INA236 is found in the spec table:

    For your design, the datasheet specs should be used, not the EVM’s. For example, the EVM user guide limits the max current because the headers imposes limitations. While on your custom PCB, different connectors can be used to handle much larger current.

    Please let me know if this addresses your concern.

    Regards

    Guang

  • 0 in reply to Guang Zhou
    Prodigy 70 points

    Hello Guang,

    Thank you very much for your response; it has been very helpful in structuring my power tree.
    I would like to take the opportunity to ask an additional question: could you please explain in more detail what exactly the term “quiescent current” means in this context?

    I understand that it refers to the current consumed by the device while in an idle state, but I would like to confirm whether this value represents only the internal maximum consumption of the INA236, or if it also includes minimal activities such as periodic conversions or passive I²C communication.

    Thanks again for your support.

    Best regards,
    Sebastián Cardona Ramírez

  • +1 in reply to Sebastian Cardona Ramirez
    TI__Mastermind 34660 points

    Hi Sebastián,

    It is a very good question. Quiescent current refers to the current consumed by the device in active state, meaning the device is actively taking measurements (ADC active). It also includes I²C communication, which is dependent on clock speed. You can refer to figure 6-22 for a rough idea of the relationship.

    Regards

    Guang