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ISO35: compatibility with ISO14xx/ISO15xx/ISO30xx?

AnBer
Mastermind 29200 points
Part Number: ISO35
Other Parts Discussed in Thread: ISO1412

Team,

The ISO35DWR is being used in a project. Looking at the product page different ISO14xx/ISO15xx/ISO30xx might be used as P2P alternative:
      ISO1412 vs ISO1432 vs ISO1452 vs ISO35 vs ISO3080 vs ISO3086

-If we keep the isolation rating and data rate aside are there some electrical specification that could cause problems to migrate an existing PCB designed for ISO35 to the ISO14xx/ISO155/ISO30xx ICs listed above?
-If yes do we have a migration document that could help?

Thanks in advance,

A.

  • +1
    TI__Genius 17100 points

    Hi AnBer,

    Thank you for posting on E2E! We don't have a migration document for ISO-RS485 devices, but a couple concerns besides data rate and isolation ratings that could impact performance are timing characteristics and power consumption.

    Since ISO35 is a low-datarate device, we typically recommend a low-datarate replacement, like ISO1412. Propagation delays typically vary between low-speed and high-speed devices, and higher-speed devices will also consume more power and have faster rise times than lower-speed devices, which could result in higher radiated emissions.

    As I mentioned, we typically recommend low-speed RS-485 device replacements for existing low-speed RS-485 solutions, but if data-rate, isolation ratings, timing specs, and power consumption have lenient requirements, then higher-speed RS-485 devices can be used as replacements as well.

    I hope this answers your question. Please let us know if there is any additional help we can provide.


    Respectfully,
    Manuel Chavez