[sdiy] analog switch question

[patchell]

    I am not familiar exactly with the DG213, but I have used the DG201 and the
DG211 a lot. The DG213 looks similar in structure to the DG211.   Generally, the
control inputs on these analog switches is just a TTL level.  So you are right,
as long as you meet the VOH and VOL specs, you will be alright ( and protect it
from voltages outside of it's range).  The DG series is my favorite because they
are very easy to use, although, maybe a little pricey.

    Sounds like you have a good handle on how to use them.

"J. Larry Hendry" wrote:

> I am about to incorporate an analog switch for the first time in one of my
> DIY projects.  I am using the DG213 because I have some, it meets my needs,
> and I have some limited experience with it.  I am looking at the data sheet
> to determine the appropriate control circuit.
>
> It appears to me that the turn on voltage is not critical.  It seems that if
> I am above the threshold and protect the control pin from both negative
> voltages and excessive current, the exact voltage does not matter.
> http://www.vishay.com/document/70662/70662.pdf
>
> If one has any sage words of wisdom to offer (dos and don'ts),  please feel
> free to insult my intelligence.  :)  I am planning to switch audio with the
> switch, and I do understand that the turn on state has resistance to it.
> That is not a problem the way I will apply it.
>
> Larry Hendry
> Still a relative newbie after all these years.

--
 -Jim
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