Short pins of Analog switch? (DG442)

[cupoftea]

Hi,
I want the Analog switch to be closed, but the micro is disabling it. So can i just over-ride the micro and connect either end of the analog switch together with a wire from pin to pin? (this is for a test i want to do on the board).
Datasheet doesnt make clear

DG442 datasheet

https://www.analog.com/en/products/dg442.html

 

[D.A.(Tony)Stewart]

Why not ? It's just the switch contacts , not an amplifier, as long as V+/- sequence fault is avoided. Yet floating inputs makes it sensitive to stray inputs.

 

[KlausST]

I want the Analog switch to be closed, but the micro is disabling it. So can i just over-ride the micro and connect either end of the analog switch together with a wire from pin to pin? (this is for a test i want to do on the board).
Datasheet doesnt make clear

I don´t get it.

Sketch?

Klaus

 

[betwixt]

Yes, you can, it is only as switch inside the IC. Things to be aware of though:
1. Normally when closed it will have some resistance, a direct link won't.
2. If the switch is normally open, it may be to prevent a collision of two signals or voltages, if you don't keep them isolated it could cause other problems.

Brian.

 

[cupoftea]

Thanks all, and the rails are +20v and -3.3v, and yes, thanks, they are sequenced right.
Saves me desoldering the blyters.