Input impedance of AD8220 with ADG1209

In my previous design, AD8220 was chosen because of the requirement of the extremely high input impedance. However, I need to modify the circuit design by adding a demultiplexer to perform a 1 to 4 switch function and ADG1209 seems suitable for my design.

However, if I add an ADG1209 after AD8220, how will it affect the input impedance of the system?

I need to maintain a high input impedance.

I attach my AD8220 circuit design in this post. ADG1209 will be added after R11 and R12.

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    •  Analog Employees 
    on Aug 2, 2018 4:53 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin
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  • 0
    •  Analog Employees 
    on Aug 2, 2018 4:53 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin
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