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Need to compare PIN diode specs

J

John - KD5YI

Jan 1, 1970
0
I have data sheets for two PIN photodiodes. I would like to compare their
sensitivities. One of them is specified in mw/cm^2 and the other is in lux.

I have tried to find a way to convert one to another, but it seems that the
mw/cm^2 is radiometry terms and lux is a photometry term involving weighting
due to the response of the human eye. I'm at a loss.

Here are the relevant data points (I think):

Diode 1
Vishay BPV22NF
80 uA at 1 mW/cm^2 at 950 nm

Diode 2
Sharp PD481PI
5 uA at 100 lux at 960 nm
(actually, they say 5 uA at 100 lux using a CIE standard light source
(tungsten lamp) but peak sensitivity is at 960 nm)

Any help comparing the relative sensitivities will be greatly appreciated.

Thanks,
John
 
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