ISOW1044: ISOW1044 long distance transmission through 2 boards check

Sean Liao (Yu-Sheng)

Part Number: ISOW1044

Hi sir,

My customer is desiging ISOW1044 on the carrier boared. However, the CAN signal needs to go to end equipment board through a cable. Currently the cable length is not confirmed and determined by end customer.

Is there any concern that the ISOW1044 transmit through long distance? (EMI, surge, signal distortion...etc.)

What would be the concern?

Is there a suggested max limit of the cable length?

Pls kindly provide a guideline or any reference design of the long distance transmission.

Thanks a lot!

7 months ago

0 Aaditya V. 7 months ago

TI__Mastermind 21565 points

Hi,

Thanks for reaching out.

Please give us additional time to review and respond due to Holiday Season.

Regards,
Aaditya

0 Sean Liao (Yu-Sheng) 6 months ago in reply to Aaditya V.

TI__Expert 5805 points

Hi Aditya,

Happy New Year, is there any update?

thanks a lot!

0 Varun Kumar 6 months ago in reply to Sean Liao (Yu-Sheng)

TI__Genius 16210 points

Hi Sean,

I'll be addressing this thread.

I'm not sure if you're new to CAN but please understand that compliance to ISO 11898 standard for CAN mentioned in datasheet also governs the length of cable and the related speed limitations. I recommend you get familiar with the ISO 11898 standard to respond CAN related queries to customer in future.

Please refer section 4.1 this Application report for Bus Length vs Signaling Rate: Controller Area Network Physical Layer Requirements

You can refer this particular appnote for more practical design queries (Section 6 and Section 10 are more of your interest): Top Design Questions About Isolated CAN Bus Design (Rev. B)

Please go through these collaterals and let us know if customer still has any questions.

Regards
Varun

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ISOW1044: ISOW1044 long distance transmission through 2 boards check