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ADC Isolation

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  • ADC Isolation

    Question regarding proper isolation method with following application requirements:
    Voltage measurement
    20 channels
    Solutions for:
    +-5 & +-10 V
    800 & 1600 Hz sample rate
    8 & 16 bit resolution
    Reading from Multiple isolated power rails
    High density system
    EMI EN55022/32 B or better
    Reading voltage from high current sensors distributed all over, the sensors are not isolated.
    each sensor provides at least one, ac or dc signal, and a return line.
    signal cables are a few meters long.

    I currently think that channel to channel isolation is required to eliminate ground loops and receive true differential readings which are not cross biased through ground.
    What are your opinions?

  • #2
    I am not expert for analogue

    PS: If it would be possible, I would probably try to place a small AD circuit as close as possible to the sensors and then used cables to transfer digital data to the central unit.