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ISO6741-Q1: Layout related issues

Ethan Liu
Intellectual 1445 points
Part Number: ISO6741-Q1
Other Parts Discussed in Thread: ISO6741

Tool/software:

Hi team,

We have a few questions about the PCB layout guidance of ISO6741:
1. Why is the layer spacing required to be this value? What is the impact on high-frequency signals? Will the same spacing be applicable to other TI isolation chips?

2. Is it allowed to drill holes and lay copper under the isolation chip? There is a sentence in the data sheet, but the reason is not explained in detail. Is it okay if only holes are drilled?

3. What level of EMC test has this ISO6741 chip passed? Can you show us the test report?

BR,

Ethan

  • 0
    TI__Genius 17585 points

    Hi Ethan,

    Thanks for reaching out.

    Please give me an additional day to review and respond.

    Regards,
    Aaditya V

  • 0 in reply to Aaditya V.
    TI__Intellectual 1445 points

    Hi Aaditya

    Thanks, hope you receive your feedbacks soon.

    BR,

    Ethan

  • 0 in reply to Ethan Liu
    TI__Genius 17585 points

    Hi Ethan,

    Ethan Liu said:
    1. Why is the layer spacing required to be this value? What is the impact on high-frequency signals? Will the same spacing be applicable to other TI isolation chips?

    This spacing is recommended in order to provide a level of protection against EMI. Yes, the same spacing a guidelines are applicable to other isolator devices as well.

    Ethan Liu said:
    2. Is it allowed to drill holes and lay copper under the isolation chip? There is a sentence in the data sheet, but the reason is not explained in detail. Is it okay if only holes are drilled?

    I will have to check about this as well. Is there a particular reason that the customer would like to drill through the PCB underneath the isolator?

    Ethan Liu said:
    3. What level of EMC test has this ISO6741 chip passed? Can you show us the test report?

    For these results, please reach out to us over email. 

    Regards,
    Aaditya V

  • 0 in reply to Aaditya V.
    TI__Genius 17585 points

    Hi Ethan,

    Thanks for emailing me. 

    I will be responding to it shortly with answers to your questions. We can continue our conversation through email.

    Regards,
    Aaditya