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danward79 30th October 2008 10:01 PM

Source Selection IC
Hi All,

I am trying to knock together an old amp I built with a PGA2310, and avr controlling it into a amplifier to go in my kit cupboard.

I have done all the above with IR control etc, etc, all on my bread boards.

I am having trouble finding a solid state source selector IC though. I need only two or three inputs.

Does anyone have any suggestions, ideally in DIL package?

I know it is not very high end but I don't need high end! before you say it. I have been searching around and found nothing.



boyofwax 30th October 2008 10:09 PM

If you can manage it with only 2 inputs I would go for a high end solution, take a small relay :D

danward79 1st November 2008 03:58 PM


Thanks for the reply, I am trying to avoid relays! :)

That would be too easy. :rolleyes:

annex666 1st November 2008 04:03 PM

My first thought is to use a summing amp; split the input resistor and switch this to ground using whatever control circuitry you choose.

Simple and probably lower distortion than any IC you happen to find to do the same.

eehobby 1st November 2008 04:09 PM

How about one of these:


mobyd 2nd November 2008 03:02 AM

How about the Sanyo LC7818..
Pacific semi stock them for the princely sum of $1.79/pc

Geek 2nd November 2008 06:12 AM

4051's have done me really good :)

(project even has expansion fro a remote RX)


Calvin 2nd November 2008 06:31 AM


Analog Devices and Maxim produce some excellent CMOS-switches with low On-resistances and different configurations and switch-numbers (example: Maxim 4580-4600 with exceptional low on-resistances, ADG1433/34, ADG428/429, ADG431-433).


danward79 2nd November 2008 05:37 PM

Hi All,

Thanks for the responses.

I like the idea of using a summing amplifier with the input shorted.

Looking at the analogue switch ic's available in DIP packages it seems I am a bit stuck for choice. All the decent ones are smd's.

mlloyd1 3rd November 2008 02:08 PM

visit the hafler web site and download the manual for the 915 preamp.
it uses a solid state input selector and it's not a bad sounding preamp.

maxim makes some nice updated replacement switches i'd use instead.

good luck!


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