Fast solid-state relay or similar component

[dave.harper]

I'm looking for a fast solid-state relay or similar component that can
support AC current (2.5kHz, 0-5V), has an on-time and off-time of .1ms
(or less), and resistance less than 50 ohms. Of course, cheaper is
better. Any suggestions?

Thanks in advance!
Dave

 

[Frank Buss]

I'm looking for a fast solid-state relay or similar component that can
support AC current (2.5kHz, 0-5V), has an on-time and off-time of .1ms
(or less), and resistance less than 50 ohms. Of course, cheaper is
better. Any suggestions?

Maybe the ADG451. It has 4 switches, 4 ohm On resistance and if you need to
switch AC, there is Vdd, Vss and GND, e.g. with Vdd=10V and Vss=-10V, it
should be possible to switch AC. Maximum continuus current is 100mA and one
application is audio and video switching, so 2.5 kHz should be no problem.
Maximum switching time is 70ns.

Only drawback: not as cheap as 74HC4066:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ADG451BRUZ-ND

 

[dave.harper]

Thanks for the advice. I ended up browsing a little more, and found
this chip:

TS12A4515P
http://focus.ti.com/lit/ds/symlink/ts12a4514.pdf

Under $1 and fast switching.

Dave

 

[Frank Buss]

Thanks for the advice. I ended up browsing a little more, and found
this chip:

TS12A4515P
http://focus.ti.com/lit/ds/symlink/ts12a4514.pdf

Under $1 and fast switching.

You are right, if you need only one, it is cheaper than ADG451, which has 4
switches and costs $4.95 at Digikey. But it can't switch AC, unless you
provide a virtual ground. But then it is more difficult to control it with
a digital signal, because you need a level converter. And the resistance is
high, but this depends on your application, if it is sufficient.

I don't see much advantage of the TS12A4515P compared to standard parts
like this, if the bigger case is no problem:

http://www.toshiba.com/taec/components2/Datasheet_Sync/151/365.pdf

 

[krw]

You are right, if you need only one, it is cheaper than ADG451, which has 4
switches and costs $4.95 at Digikey. But it can't switch AC, unless you
provide a virtual ground. But then it is more difficult to control it with
a digital signal, because you need a level converter. And the resistance is
high, but this depends on your application, if it is sufficient.

The ADG44x series is about half the cost with a penalty in on
resistance. I'm using both (ADG442 and ADG452) to switch resistors
(digi-pots aren't high enough power) and capacitors in hybrid. The
DigiKey prices for both are at least 2X the going price.