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INA139: VS INA199

justifice zhou
Intellectual 400 points
Part Number: INA139
Other Parts Discussed in Thread: INA199

Hi,

I'm choosing a current sense amp.

INA139's GAIN can be set by external RL.

INA199's GAIN is fixed with different version.

When should I choose INA139 and when should I choose INA199?

  • 0
    TI__Intellectual 1235 points

    Hi Justifice,

    There are several key differences between the INA139 and INA199. As you mentioned, one main difference is that the gain of the INA139 has variable/adjustable gain based on the external RL. In some cases it may be beneficial to be able to choose the gain, but usually a fixed gain option (like INA199) will work.

    Another key difference is that the INA139 is uni-directional while the INA199 is bi-directional. 

    The INA199 is also has better performance than the INA139 as seen in the side-by-side comparison shown here. 

    Please let me know if you have any further questions. 

    Cierra