Author Topic: Convert -10V to +15V, into 0-5V  (Read 1400 times)

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Offline AQUAMAN

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Convert -10V to +15V, into 0-5V
« on: July 09, 2014, 12:36:33 am »
Hello all, this thread is related to another thread I posted and got great help with.

I have a gate driver and I want the gate voltage to control a CMOS switch that is 0-5V

The problem is that I can't access the 'gate trigger signal' from the gate driver (ie the 0-3.3/5V signal I get from the DSP), so Im stuck with looking at the full -10V - +15V gate voltage.

Is there a way to convert this signal to 0-5V? I thought of a voltage divider and a diode, as I dont need much current to control these switches (http://www.analog.com/static/imported-files/data_sheets/ADG719.pdf)

But even here I can only get -0.6V to 5V and Im not sure the switch will take that negative voltage as in the data sheet it says that it can take -0.3V at a max

Otherwise, I have to include another optical fibre terminal and additional pulse from my DSP. Actually the board I built has this but I would like very much to save space.

« Last Edit: July 09, 2014, 12:39:29 am by AQUAMAN »
 

Offline jmoreland79

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Re: Convert -10V to +15V, into 0-5V
« Reply #1 on: July 09, 2014, 01:06:11 am »
Why not just use a positive voltage regulator to handle the -10V to +15V?  Datasheet attached. 
 


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