Re: Audio Switcher Help


"Jan Panteltje" <pNaonStpealmtje@xxxxxxxxx> wrote in message
news:fhrtb7$ls1$1@xxxxxxxxxxx
On a sunny day (Mon, 19 Nov 2007 07:31:45 GMT) it happened "Jon Slaughter"
<Jon_Slaughter@xxxxxxxxxxx> wrote in
<BZa0j.72980$Um6.44491@xxxxxxxxxxxxxxxxxxxxxxxxxx>:


I'm trying to use the MAX4571 essentially to mute some audio channels,

http://www.maxim-ic.com/quick_view2.cfm?t=qv&qv_pk=1974#Applications%2FUses

It has only ground and +?
Then you must likely bias your audio at 1/2Ub, else bottom get clipped.

analog signal range is from 0 to +V!!
+V
|
R
|---------- chip input
audio in --C---|
|
R
|
///


Some of there chips allow -V on the signal. I guess they use a charge pump
to generate -V. Kinda sucsk that this one doesn't.

That chip sucks in my view,
their 'no click' switching seems to be a slow 8 ms bump.

The 74HC4053 rocks, has negative supply.


I need a very large number of switches(about 80) that uses a small space as
possible.

Having to bias it really sucks but I guess I don't have much of a choice ;/
For my application I guess the clickless switching is not all that
important. (I suppose I could do the switching myself by monitoring the
signal with the Pic and switch when needed using the high speed mode).



.

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