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Interfacing microcontroller with +/- 10V?

Texton

Jul 27, 2012
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Jul 27, 2012
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Hi guys.

I have to design a interfaceboard for my microcontroller (PSoC5 - 3.3V). The interface board should have +/- 10V in/out and a minimum bandwidth at 48kHz.

My plan for the output right now is to control mosfets with the microcontroller which opens and closes for the 10V.

But before I begin to build and test anything, I wanted to see if you guys had some suggestions/tips?
 

GreenGiant

Feb 9, 2012
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Feb 9, 2012
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I would go with mosfets or just regular NPN/PNP transistors if you don't need much current, they tend to be very fast and cheaper, but like I said they don't handle current well
 

Texton

Jul 27, 2012
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Jul 27, 2012
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What if I need current? (not that I necessarily do, but just for the knowledge)

And what about input? :)
 

GreenGiant

Feb 9, 2012
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if you need current use the mosfets, though high speed (switching time less than 20us aka 48kHz) will cost you a pretty penny

what do you mean about input?
control to the fets? you can find them with control as low as 3.3 so the micro should be able to handle that
 

zalmonox

Aug 19, 2012
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Aug 19, 2012
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OK if you need little current <.8A use transisotrs, if you go higher in current use mosfets but be careful how you control them -- this might bite you if you handle negative voltage levels ... and if you need a lot of current you may consider using relays. You can find a lot of exampes here http://electroschematics.com/tag/audio-amplifier-circuits/

best
 
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Texton

Jul 27, 2012
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Jul 27, 2012
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Hi all. Thank you very much for your reply's, it was helpful :)
 

dpenelob

Mar 27, 2013
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Mar 27, 2013
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Addendum:
If you would like to transmit digital data, e.g. just "on" and "off", you could
use a MAX232. For analog signals, I would suggest a differential line driver
for analog signals. Have a look at Linear Technology's products for a start, I suppose.
 
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