What is the AD equivalent part number to discontinued SSM2402...for Audio?

Hello Luc,

I moved your question over to the Switches and Multiplexer part of the forum. There are no SSM parts that have been produced to replace this part.

Thanks,

Dave T

Hi Luc,

Sorry, I don't see anything in a DIP package that can take a power supply of +/-18V in our catalogue right now.  If you can move to a TSSOP or LFCSP then the ADG5436 might be a good option for you.  Going to +/-15V opens up a lot of options in DIP's.  

Regards,

Eric.

Hello Dave and Eric

Thanks very much for replies!

Eric...you say ADG5436.

It could be very interesting but as you say it has no dip model of it.

OK. If I would stick in using ±15V supplies only what according to you should be the nearest(s) équivalent to the low distortion SSM2402/4?

Luc

Hi Luc,

Sticking with DIP's and dropping to +/-15V then the ADG436 is an option for a dual SPDT.

Unfortunately THD+N isn't on the datasheet so I can't compare.  But looking at the Ron plot Figure 3 you can see when you use a +/-15V supply then they Ron is getting flat.  Do you know what signal range you will put through the switch?  Notice outside +/-10V then the Ron changes significantly.

Let me check if there are any other options.

Regards,

Eric.

Hi Luc,

Yes you are right, for this part it will operate up to +/-20V supplies so you can indeed work with +/-18V.  I should have noted that for you.  But do note that the spec table 1 in the datasheet was built around +/-15V supply data or what is mentioned in the test conditions/comments section. That said this data will be a good guide for you if your using +/- 18V supplies. We can't test all possible use cases w.r.t. supplies so that is why we go for typical cases like +/-15V etc even if the part can work at higher supplies.  

When this part was released (in 1996) I think THD+N testing wasn't a standard entry on all our datasheets.  But let me double check in case there was some data recorded since release.

I think with your audio line signal range of 2 Vrms then you are in the good flat Ron region. 

Regards,

Eric.

Hello Eric

Thanks again for replying!

Yes indeed, you're right, ADG436 is available in DIP and very interesting.

You mention a ±15V supply for it but in their performances graphic they show ±16.5 V references.

And also one of the first thing we see in the feature lists from the spec sheet is sheet "44V supply maximum rating".

At page 3, down this page...power requirements of ±3, ±20V...

And later, they mention maximum of +30V at Vdd .

From this may I conclude a feasible operation in ±18V?

Luc

Eric

Sorry I forgot to include 6this in my reply

My app is for Audio.

1) So a bandwidth a 200KHz, a decade over Max 20KHz.

2) Line levels in Audio usually peak at +6DBV (2 Vrms) in their highest levels operation.

  But for tests and headroom practice, these must be able to put out at least +20DBV or 10Vrms.

THD+N could be more informative than saying "... ensuring good linearity and low distortion when

switching audio signals. "

Luc

Oh great!

If you could indeed have more data about it would be just fine.

By the way what primarily, creates distortion and noise into a switch like these?

Thanks!

Luc

Hi Luc,

Its really down to Ron variation.  Have a look at his app note which has some explanation on CMOS switches.

http://www.analog.com/static/imported-files/tutorials/MT-088.pdf

Hello Eric

I read it ...interesting.

Also isolation is 90dB+ up t0 100KHz for audio. Good.

I will order few of these ADG436 from DGK for tests.

I will try in a ±17 PSU.

According to you what would be the needed voltage to control  IN1 and IN2...5V?

Thanks Eric!

Luc