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AMC1100: Isolation Voltage

Neethu Joy
Prodigy 85 points

Part Number: AMC1100

Tool/software:

Hi,

I am currently using the AMC1100DUBR isolation amplifier with voltage measurement circuit, and I have a query regarding its isolation specifications. It is stated that the isolation voltage is 3000 volts, but its also mentioned as"maximum repetitive peak isolation voltage. as 1200 Vpeak". Could you please clarify the difference between these two specifications? I need an isolation of 2KV throughout the operation.

Regards

Neethu Joy

  • 0
    TI__Prodigy 260 points

    Hi Neethu,

    • The isolation voltage of 3005V that you are referring to is the withstand isolation voltage. This is the maximum voltage that the device can withstand for one minute.
    • The maximum repetitive peak isolation voltage at 1200 Vpeak (AC voltage) is the maximum repetitive peak voltage that the device's isolation barrier can withstand. 

    I am attaching this app note that talks about the different isolation specifications: High-voltage reinforced isolation: Definitions and test methodologies.

    For the AMC1100- this device has a working voltage of 849Vrms, which is the maximum rms that the isolation barrier can withstand over time, throughout operation. 

    As far as devices that have a 2kV throughout operation:

    • AMC14xx family - working voltage of 2kVrms/2.8Vdc.
    • AMC13xx family - working voltage of 1.5kVrms/2121Vdc. (slightly lower working voltage)

    Regards,

    Alexandra Torres