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Source Selection IC
Source Selection IC
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Old 30th October 2008, 10:01 PM   #1
danward79 is offline danward79  United Kingdom
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Default 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.


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Old 30th October 2008, 10:09 PM   #2
boyofwax is offline boyofwax  Netherlands
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If you can manage it with only 2 inputs I would go for a high end solution, take a small relay
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Old 1st November 2008, 03:58 PM   #3
danward79 is offline danward79  United Kingdom
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Thanks for the reply, I am trying to avoid relays!

That would be too easy.
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Old 1st November 2008, 04:03 PM   #4
annex666 is offline annex666  England
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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.
...if it ain't broke don't fix it - make it BETTER!
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Old 1st November 2008, 04:09 PM   #5
eehobby is offline eehobby  Canada
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How about one of these:

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Old 2nd November 2008, 03:02 AM   #6
mobyd is offline mobyd  New Zealand
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How about the Sanyo LC7818..
Pacific semi stock them for the princely sum of $1.79/pc
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Old 2nd November 2008, 06:12 AM   #7
Geek is offline Geek
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4051's have done me really good


(project even has expansion fro a remote RX)

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Old 2nd November 2008, 06:31 AM   #8
Calvin is offline Calvin  Germany
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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).

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Old 2nd November 2008, 05:37 PM   #9
danward79 is offline danward79  United Kingdom
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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.
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Old 3rd November 2008, 02:08 PM   #10
mlloyd1 is offline mlloyd1  United States
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Source Selection IC
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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