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Need MA to voltage help

J

Jim

Jan 1, 1970
0
I have a sunlight sensor made up of 2 tiny amorphous solar cells in
parallel, that I would like to use with a 0-5 volt data logger. These cells
provide the spectral response I want.

The cells together generate a maximum of 2.25ma of current in full sunlight
that I need to convert to voltage.

I have used a OP90 op amp in the past to do the same for other sensors, but
only for microamp currents. I did the math to find the value of the
feedback resistor for this, and come up with something like .0022 ohms which
doesn't seem too workable. Either I am making a mistake in my math or maybe
it isn't possible to do this conversion using a single op amp.

Can someone give me an option for making this a>v converter for this 2.25ma
current?

Thanks
Jim
 
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