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INA223: Detailed PCB layour is required

Part Number: INA223
Other Parts Discussed in Thread: , INA233

Sir

 

According to Document # SBOU125–June 2012: INA223EVM User’s Guide and Software Tutorial

 

Only components placement as Fig 24 is available. I am not experienced for INA series

Could you please help to deliver the Gerber file or exported PCB file (I am using Altium Design) to me?

I can try to just “copy” the layout to save the time consumption.

 

Thanks

Regards

Ben

  • INA223EVM_PCBlayers.PDFHello Ben,

    Here are all of the signal layer plots for the EVM. Hope this helps.

    Peter Iliya

    Current Sensing Applications

  • Hi Peter

    Could you please provide the exact “INA223” file?

    INA223 is analog only but INA233 has ADC inside, the specific application is different

    Incorrect layout will result in much error for pure analog design, we must try hard to avoid.


    Thanks
    Regards
    Ben
  • INA223-PCB-A.zipHey Ben,

    Sorry about that. This is quite an old EVM so there isn't much left with original documentation, but here are the files I found. Please note that if you plan to design this board to remove the Texas Instruments logo.

    Sincerely,

    Peter Iliya

    Current Sensing Applications

  • Hi Peter


    Greatly appreciate for your support!

    Additional question raised is about the measurement tip and recommendation!

    For gain the acceptable result, we would like to check the performance of INA223 first

    According to Power Calculation
    Equation 1 --- VOUT = (VCM) (VSENSE) (POWER GAIN)

    Can I measure VCM and VSENSE respectively (Reading the value from the multifunctional DC meter) and substitute them into the equation 1 to get the calculated VOUT and correlate to the measured VOUT (also read from DC Meter)?

    Does your power measurement error filled in the electrical table gain from the same approach or not?

    Any recommendation that is helpful to have a quick start is welcome!

    Thanks
    Regards
    Ben
  • Hey Ben,

    The approach you are describing is really the only way to measure the error and you should see the error percentages that we specify in datasheet electrical table specifications.

    Keep in mind that the VOUT value may differ depending on which Power Output mode you choose. The two modes are Load Power and Supply Power and they dictate where the bus voltage (or VCM in equation 1) are measured. You can read about this in EVM User's Guide or datahsheet.

    Sincerely,

    Peter Iliya

    Current Sensing Applications

  • Hi Peter


    Thanks for reminder!

    So the power measurement error filled in the electrical characteristic is got from the default Supply Power Mode?


    Regards
    Ben
  • Hey Ben,

    Actually the power measurement error specifications should apply to both Power Output Modes ("Load Power" and "Supply Power"). Hope this helps.

    Sincerely,
    Peter Iliya