About an ADG884 power supply off state

Hello Yuji,

The state of the switch with no power supplied is not gaurantteed.  In addition if a signal is applied to the unpowered switch it can turn the switch on and forward bias the ESD diodes.  To avoid these risks I would recommend to use the ADG4612/ADG4613 switches as they are gaurantteed to be off when no power is supplied. 

http://www.analog.com/en/switchesmultiplexers/analog-switches/adg4612/products/product.html

Hello EricC,

Thanks for advice.

I tell your advice to a customer.

Regards,

yuji