Analog switch

[Roman Arnet]

Hi
I'm looking for a solution to switch two audio channels. The channels
are in the range of 0..3V and 0..-3V. The distortion should be < 0.03%
and crosstalk < 90dB.

Ch0+ ---
---- CH0+ or CH1+
Ch1+ ---

Ch0- ---
---- CH0- or CH1-
Ch1- ---
The use of relay is not possible due to their power dissipation.
Any suggestions?
Thanks
Roman

 

[Glenn Gundlach]

Roman Arnet <user242@hotmail.com> wrote in message news:<ciukf1$hbo$1@newshispeed.ch>...

Hi
I'm looking for a solution to switch two audio channels. The channels
are in the range of 0..3V and 0..-3V. The distortion should be < 0.03%
and crosstalk < 90dB.

Ch0+ ---
---- CH0+ or CH1+
Ch1+ ---

Ch0- ---
---- CH0- or CH1-
Ch1- ---
The use of relay is not possible due to their power dissipation.
Any suggestions?
Thanks
Roman

I have not used this chip for audio but have had excellent results
with video
http://www.analog.com/UploadedFiles/Data_Sheets/12075248AD8180_2_b.pdf
There is also a 4-1 selector AD8184.

For audio it may not have enough headroom since audio folks have a
habit of sloppy level control. Now that I offended audio people, video
levels are far more consistent even across consumer formats.

Switching video requires gain/offset/timing matching. Not difficult
but required for no breakup.
gg

 

[Dan Fraser]

Nothing beats relays for low distortion. And there are some that only draw a
few tens of milliwatts. Otherwise, do a search for "Analog Switches". There
are dozens if not hundreds to choose from.

"Roman Arnet" <user242@hotmail.com> wrote in message
news:ciukf1$hbo$1@newshispeed.ch...

Hi
I'm looking for a solution to switch two audio channels. The channels
are in the range of 0..3V and 0..-3V. The distortion should be < 0.03%
and crosstalk < 90dB.

Ch0+ ---
---- CH0+ or CH1+
Ch1+ ---

Ch0- ---
---- CH0- or CH1-
Ch1- ---
The use of relay is not possible due to their power dissipation.
Any suggestions?
Thanks
Roman

 

[Roman Arnet]

Glenn Gundlach schrieb:

Roman Arnet <user242@hotmail.com> wrote in message news:<ciukf1$hbo$1@newshispeed.ch>...

Hi
I'm looking for a solution to switch two audio channels. The channels
are in the range of 0..3V and 0..-3V. The distortion should be < 0.03%
and crosstalk < 90dB.

Ch0+ ---
---- CH0+ or CH1+
Ch1+ ---

Ch0- ---
---- CH0- or CH1-
Ch1- ---
The use of relay is not possible due to their power dissipation.
Any suggestions?
Thanks
Roman


I have not used this chip for audio but have had excellent results
with video
http://www.analog.com/UploadedFiles/Data_Sheets/12075248AD8180_2_b.pdf
There is also a 4-1 selector AD8184.

For audio it may not have enough headroom since audio folks have a
habit of sloppy level control. Now that I offended audio people, video
levels are far more consistent even across consumer formats.

Switching video requires gain/offset/timing matching. Not difficult
but required for no breakup.
gg

I'm wondering about the datasheets of CMOS switches. I've got data about
THD+N, crosstalk and many others. What I'm missing here is the noise
produced by the CMOS technology.
My microphone singnals will be around 500uV (or even less)! I really
don't know how how much noise I can estimate from CMOS switches.
Roman