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INA3221EVM: INA3221EVM and SM-USB-DIG Platform

Andy Wong
Prodigy 30 points
Part Number: INA3221EVM
Other Parts Discussed in Thread: INA4230, INA4235, INA3221, INA2227

Tool/software:

Hi,

I have several questions related to INA3221EVM.

  • I want to try INA3221EVM but according to the user guide I need SM-USB-DIG Platform. I did google search but I could not find anything about ordering SM-USB-DIG Platform from TI. I can only find it from eBay. Is this platform still supported by TI?
  • I need to measure power on multiple power rails ( 10 to 12 rails) simultaneously. So I need to communicate with multiple INA3221EVM at the same time. Is it possible? It looks like SM-USB-DIG Platform can only connect to one INA3221EVM. 
  • Another option is to use multiple INA3221EVM + SM-USB-DIG Platform pairs. Then can I run multiple INA3221EVM software at the same time in Windows? Will the Graph Log work while multiple software are running in Windows?

Thanks.

  • 0
    TI__Mastermind 26105 points

    Hello Andy,

    The SM-USB-DIG comes with the INA3221EVM, so you don't need to worry about ordering it separately. 

    I believe the INA3221EVM on the SM-USB-DIG platform will only support 1 device at a time. Unfortunately, I don't think running multiple GUI's would work either, since there is no way for the GUI to distinguish which SM-USB-DIG it is connected to. You could use multiple computers.... but that may not be an option for you.

    On a side note, you may be interested in the INA4235 or INA4230. These are newer 4 channel devices. The EVM platform that these are on is also newer. Currently, the GUI can only support 1 EVM at a time also, however support for 4 EVMs at a time through the GUI is being added and should be available later this year.

    Also, the INA3221 will transition to the newer platform eventually, and will support 4 EVMs at a time once on the new platform, but I don't have a great time estimate for that at the moment.

    The INA2227 is a newer 2 channel device on the new platform, and it does support 4 EVMs on the GUI, but that is still not quite enough for you.

    Regards,

    Mitch