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analog switching with ICs

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ulaska

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Hello,
i want to build this with a mux or something..
there is 4 channel select,
the selected channel's pin must be pulled down to GND.

CH1 ----O
CH2 ---O <----O---| GND
CH3 ---O
CH4 ----O



how can it be ?? i will use GPIOs for controlling the switch IC.
which IC (mux or etc.) i must use?

thanks and regards..
 

Hi,

You can try these analog switches CD4066. Its main application is to multiplex or demultiplex analog signals. They are pretty easy to use, just like normal switches but they have a control pin to make it close (lot alike a relay...)
Check its data sheet at: hxxp://www.fairchildsemi.com/ds/CD/CD4066BC.pdf

hope i could help
mcoster
 

    U

    ulaska

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Another option is to use CD4051 (part of it) or CD4052 (1/2 of it - see picture below) ..
It is almost like having CD4066 CMOS switches with some additional logic ..

Regards,
IanP
 

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    ulaska

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