DNA Pin photodiodes, what are their voltage and current?

V

vannygen

New Member
Hello everybody,
I have to drive a matrix for revealing DNA samples,
well this matrix is made up by p-i-n photodiodes which generate current if an UltraViolet radiation hit them.
I'm desperatly looking for their working voltage and current.. I mean: what's the voltage they have when flowing current and what's their breakdown voltage? Also: how many mA can flow in them? and how many volts they can afford...
HELP ME! :eek:
 
B

BeanieBots

Moderator
I'm affraid that depends on which ones you have.
"Very little" is best answer I can give you. The DATASHEET will tell you.
If you don't have one, then experiment.
The best load for measuring current is a short circuit. That can easily be done by using an op-amp configured to give a virtual earth. Fit the diode to the input. Change the feedback resistor to give a sensible output voltage for what ever the current turns out to be and note what V/R is required to maintain the virtual earth. That will tell you the current.
 
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