ADG408 and 409 multiplexer

Hi, Tom.

Could you share more details about this application? Information like voltage range, supply voltage, operating frequency and a schematic will help us better understand your question.

Yours sincerely,

Igor.

System has thrown out my picture... once again.

I´m working on a vintage amplifier made by dual (company originally doesn´t exist anymore). They have bought out in their last steps two amps with a complete multiplexer control (no potis inside). All inputs, volume control, bass treble and balance is switched by CD4051 multiplexers. For this age a revolution. They are working with +/-7.5V regulated; the buffer op-amps +/-15V and the max of this power source has +/-18V. The frequency is the normal audio range; at least 20-20000HZ with no deviation.

Now. i want to replace this chips with the named types cause the they have no break before... and are not really low noise.

I try to find a solution to upload the schematics, but in www you can find easily the plan of the DUAL RC440 amp.

Regards

Tom

Hi, Tom.

Apologies for the late reply.

If the voltage passing through the switch are withing the switch's rails, VDD and VSS (+/-7.5 V in your case), it should be okay for you to replace the CD4051 and CD4052 with the ADG408 and ADG409.

Your frequency range should be within the -3dB bandwidth of these two switches as well.

If you are looking at higher precision and low signal distortion, I recommend that you use the ADG1408 and ADG1409.

Unfortunately, I did not find the schematics for the DUAL RC440/RC441 amp you suggested. Could you share these with me?

Yours sincerely,

Igor.

https://www.google.de/search?sxsrf=ALeKk01Z2jZak5izGpJiZLPeItFTPwDVRw:1614279519051&q=dual+cv+440+rc+service+manual&spell=1&sa=X&ved=2ahUKEwjT3LPq24XvAhUFC-wKHZVECfsQBSgAegQIDRA6&biw=1280&bih=538&dpr=1.5#

Hello Igor,

there you can find the schematics. So, i´m looking for your suggested multiplexers...

Regards

Tom

https://www.google.de/search?sxsrf=ALeKk01Z2jZak5izGpJiZLPeItFTPwDVRw:1614279519051&q=dual+cv+440+rc+service+manual&spell=1&sa=X&ved=2ahUKEwjT3LPq24XvAhUFC-wKHZVECfsQBSgAegQIDRA6&biw=1280&bih=538&dpr=1.5#

Hello Igor,

there you can find the schematics. So, i´m looking for your suggested multiplexers...

Regards

Tom