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ISO7721-Q1: Modulation frequency

Part Number: ISO7721-Q1
Other Parts Discussed in Thread: ISO7721


could you please tell me what oscillator'frequency of ON-OFF keying (OOK) modulation scheme?

I have searched around the ISO7721's datasheet but couldn't find explanation.

My customer wonders if modulation frequency will be influence EMC test.

  • Hello,

    Thank you for your question.

    The OOK frequency is around 450MHz for the ISO7721.

    The internal OOK carriers in the ISO7721 device are very low in power and we do not see them showing up in most industrial and automotive RE tests like CISPR 32 and CISPR 25.

    The EMC performance of the device in relation to the OOK frequency depends on the application that the digital isolator will be used in. For more information on the EMC considerations for the ISO7721, please refer to section 8.3.1 in the datasheet.

    Aaditya Vittal