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which one will fit better INA210 or INA216

Other Parts Discussed in Thread: INA210, INA214


my load is 12VDC@0.4A.

i am trying to detect when the current drops to 0.3A.

which one shoud i choose. of course i wish to be cost effective.

  • The INA210 is likely the best fit for your application of the two devices you suggest.  The data sheet for the INA216A4 says that the Common-Mode Voltage (which is also the power supply for the device) is only intended to run up to +5.5V, with an absolute, unspecified maximum of +7V.  With your load = +12V, the INA216A4 won't even work for your application.

    The INA210 accepts common mode voltages from -0.3V to +26V and if you want the 100V/V scaling of the INA216A4, then select device INA214.

    Below is an example circuit and the simulated output.  As the current goes from 0.3A to 0.4A across the 5mOhm shunt, the Vout goes from 300mV to 400mV.  This can be adjusted by choosing a part with a different gain or by changing the shunt resistor.

    I hope this answers your question.

    Jason Bridgmon