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ADG1419 opto-coupler driving issue

Question asked by Verti on Mar 30, 2017
Latest reply on Mar 30, 2017 by Davidforde

Dear Specialists,

         We use opto-coupler to dive ADG1419 input P/N but failed, the driving current is nearly 2.5mA- 3mA. If we change to use logic gate instead it works. We  wonder whether it caused by high input impedance when using opto-coupler. We can not find input current or input impedance info in datasheet, can you kindly help to explain it, thank you so much. 

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