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LTM2881 and LTM2882 in Space Applications


We are considering using the LTM2881 and LTM2882 in a space application for RS-232 and RS-422 communications.

Does this sound like a good idea?

Do you have any radiation or vacuum concerns about this chip?

Does it have any space heritage that you know about?

Do you have any other recommendations?



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  • Thanks for the fast reply, Conal!

    Follow up question - If we used those space qualified chips for isolation between the UART and transceiver, would we then use a non-space qualified transceiver to convert to the 422/232 protocols? If so, do you have any recommendations?

  • Sorry - I missed your follow-up question. I think it depends on the nature of your application, typically space-qualified parts will be radiation-tolerant or radiation-hardened; but there will be specific requirements to be fulfilled depending on system design (redundancy, retransmission, error handling/correction) and the operating environment (e.g. temperature range). Usually a general purpose part won't be suitable.

    For our standard RS-485 products, newer options typically are more robust simply to industrial-type environments (so IEC 61000-4-2 ESD, IEC 61000-4-4 EFT, even IEC 61000-4-5 surge). Examples with ESD/EFT built in would be ADM3065E as general purpose, or ADM3095E with Level 4 Surge as well as fault protection (miswire of supply to data bus). These are at least available as "EP" enhanced product models with -55C to +125C operation and robust package materials, but no other specific capabilities for Space applications.

    Most RS-232 models are to support specific legacy pinouts and feature sets. LTC2801-LTC2804 offer an extended 1.8V-5.5V supply flexibility, and ADM3232E would be an alternative part with more ESD robustness than legacy parts. LTC2873 is the most recent solution for multi-protocol RS-485/RS-232; this may be of interest in the general case and is -40C to +125C (the RS-232 are -40 to +85C), but again it's not got any specific capabilities for Space applications.