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What is the current noise density of the AD8646/7/8?

The data sheet says "featuring... low current noise" and then never says what it is. Also, "featuring... low input voltage" should probably read "featuring... low input voltage noise." 

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  • Hi ,

    Current noise for CMOS parts is extremely difficult to measure.  While we cannot say exactly what it is because of physical limits of measurement equipment, I can tell you that it is below 50fA/rtHz at 1kHz.

    - See answer above.  Also, thank you for the suggestion - we are actually in the process of measuring and releasing that information for our CMOS parts as well.

    -Tony

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  • Hi ,

    Current noise for CMOS parts is extremely difficult to measure.  While we cannot say exactly what it is because of physical limits of measurement equipment, I can tell you that it is below 50fA/rtHz at 1kHz.

    - See answer above.  Also, thank you for the suggestion - we are actually in the process of measuring and releasing that information for our CMOS parts as well.

    -Tony

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