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ADG5436 overvoltage protection

Question asked by SteffenH on Dec 16, 2012
Latest reply on Dec 17, 2012 by SteffenH

I have a question about protecting the inputs of an unpowered ADG5436. The document

'Ask The Applications Engineer–40 Switch and Multiplexer Design Considerations for Hostile Environments'


illustrates different possibilities of protecting input signals from overvoltage conditions. Is there anything against to combine the resistor-diode protection network (figure 8) and the blocking diodes (figure 9)? I think of combining these protection schemes in a way, that the schottky diodes are behind the blocking diodes, to prevent the input signal to supply the upstream circuitry in case of an unpowered switch.


Kind regards,