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INA700EVM: INA700EVM

shivaraj r
Prodigy 140 points
Part Number: INA700EVM
Other Parts Discussed in Thread: TI-SCB,

Tool/software:

HI,

I need current sense Monitor module or EVM kindly suggest below Requirements.

Required 4 channels monitor each channels should have below specifications 

1)Max current 10A

Voltages are +5v,-5V,+15V,-15V 4channels


2)To measure sense current

3)Monitor voltage

Above voltage & current monitor through PXI AI 

Regards,

shivaraj.r   

  • 0
    TI__Mastermind 24190 points

    Hello Shivaraj,

    The EVM you are looking for is the INA4235EVM or INA4230EVM, found here: https://www.ti.com/tool/INA423XEVM. For a voltage measurement, our device can only handle a positive common mode voltage, up to 48V, so it will not work with your negative voltages without modification. None of our digital power monitors can do negative voltage common mode without modification. If you want to use the EVM with negative voltages, for your setup you could power the GND pin with -15V, and power the device with -10V (making your +15V effectively +30V, then manually adjust result values accordingly). Then you would need a digital isolator between the EVM and the MCU (or TI-SCB if using our firmware/GUI). Here are some examples:

    https://www.ti.com/tool/TIDA-00313

    https://www.ti.com/tool/TIDA-01608 

    Note to make sure that the logic levels between the INA and the isolator you use are compatible, especially the logic low levels. Note that many isolators have different specs for each side of the isolation. Logic level shifters can also be used to make up for the mismatch between the two.

    If you want an integrated shunt device, like the INA700EVM, that is fine too, but you will need 4 of them, since they are single channel. You would also need an isolator for the negative voltages 

     You could also use isolated ADCs (https://www.ti.com/isolation/isolated-adcs/overview.html), and use one for current and one for voltage, then do the power math yourself. 

    Regards,

    Mitch