For ESD diode on OUT+ line, should not use ESD component which capacitance is larger than 1pF or 2pF, correct? Does BU have MAX9275 ESD test report for their reference? If Garmin still want to reserve it in case we really need it, does BU has any suggesti

Question

For ESD diode on OUT+ line, should  not use ESD component which capacitance is larger than 1pF or 2pF, correct? Does BU have MAX9275 ESD test report for their reference? If Garmin still want to reserve it in case we really need it, does BU has any suggesti

Accepted Answer

Yes, that's correct. Maxim BU do not have any ESD test reports for Garmin reference. Please see below pdf "Item 7 Figure" for ESD7004, SZESD7004 that we are using for GMSL-2 that should probably be good for GMSL-1 too.

https://www.onsemi.jp/PowerSolutions/document/ESD7004-D.PDF

Choosing an ESD diode is balancing between ESD performance and capacitance. Lower capacitance is better but you lose ESD performance. I would look at the insertion loss of the ESD diode and make sure at the GMSL-1 frequency (1.5GHz area and the reverse channel frequency 1MHz~) are basically 0. If they want higher system ESD they can bump up diode but your insertion loss will be worse.

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For ESD diode on OUT+ line, should not use ESD component which capacitance is larger than 1pF or 2pF, correct? Does BU have MAX9275 ESD test report for their reference? If Garmin still want to reserve it in case we really need it, does BU has any suggesti