LTC2875 Interface Protection

Hello,

The last page of the LTC2875 Data sheet (Rev A) shows a circuit for IEC Level 4 protection against surge, EFT, and ESD.  3 Questions:

  1. Should there also be a 120 Ohm resistor between CANH and CANL as shown on the typical circuit on page 1?
  2. If yes where should it be (I'm assuming between the TVS and the LTC2875.
  3. Is IEC Level 4 on par with RTCA DO-160 Level 4 Lightning protection?

Thank you very much,

Jim

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