Source Selection IC

danward79 · 30th October 2008, 10:01 PM

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.

Thanks

Dan

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

danward79 · 1st November 2008, 03:58 PM

Hi,

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

That would be too easy.

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:
http://www.maxim-ic.com/products/switches/audio/

Jake

mobyd · 2nd November 2008, 03:02 AM

How about the Sanyo LC7818..
http://www.datasheetarchive.com/pdf-...f-4/56179.html
Pacific semi stock them for the princely sum of $1.79/pc
http://pacificsemi.com/search.php
M

Geek · 2nd November 2008, 06:12 AM

4051's have done me really good

http://geek.scorpiorising.ca/GeeK_Zo...p?topic=3825.0

(project even has expansion fro a remote RX)

Cheers!

Calvin · 2nd November 2008, 06:31 AM

Hi,

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).

jauu
Calvin

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!

mlloyd1

30th October 2008, 10:01 PM	#1
danward79 diyAudio Member Join Date: Jan 2008	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. Thanks Dan

1st November 2008, 04:03 PM	#4
annex666 diyAudio Member Join Date: Jul 2002 Location: England	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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30th October 2008, 10:09 PM	#2
boyofwax diyAudio Member Join Date: Feb 2004 Location: Arnhem Netherlands	If you can manage it with only 2 inputs I would go for a high end solution, take a small relay

1st November 2008, 03:58 PM	#3
danward79 diyAudio Member Join Date: Jan 2008	Hi, Thanks for the reply, I am trying to avoid relays! That would be too easy.

1st November 2008, 04:09 PM	#5
eehobby diyAudio Member Join Date: Aug 2003 Location: Calgary	How about one of these: http://www.maxim-ic.com/products/switches/audio/ Jake

2nd November 2008, 03:02 AM	#6
mobyd diyAudio Member Join Date: Sep 2004 Location: Auckland	How about the Sanyo LC7818.. http://www.datasheetarchive.com/pdf-...f-4/56179.html Pacific semi stock them for the princely sum of $1.79/pc http://pacificsemi.com/search.php M

2nd November 2008, 06:12 AM	#7
Geek diyAudio Member Join Date: Sep 2004	4051's have done me really good http://geek.scorpiorising.ca/GeeK_Zo...p?topic=3825.0 (project even has expansion fro a remote RX) Cheers!

2nd November 2008, 06:31 AM	#8
Calvin diyAudio Member Join Date: Nov 2004 Location: close to Basel	Hi, 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). jauu Calvin

2nd November 2008, 05:37 PM	#9
danward79 diyAudio Member Join Date: Jan 2008	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.

3rd November 2008, 02:08 PM	#10
mlloyd1 diyAudio Member Join Date: Feb 2001 Location: illinois	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! mlloyd1