Photodiode
current (650 nm)
phi ≔ 0.45
length
A
―
W
phl ≔ 0.09
Sun
width
in
phw ≔ 0.09
area
in
pha ≔ phl ⋅ phw = 5.226
W
photo current at 1000 ――
(650 nm)
m2
W
Psun ≔ 1000 ――
m2
phisun ≔ Psun ⋅ phi ⋅ pha = 2.352
mA
OPT101
resistor required
Vopt101 ≔ 5.0 V
Vopt101
= 2.126
phrgain ≔ ―――
phisun
phcgain ≔ 79
kΩ
23 pF
⋅ phrgain = 78.022 pF
pF − ― ――
50 kΩ
i have 2.2 kΩ resistors
r ≔ 2.2 kΩ
maximum measurable power with 5v0
Vopt101
= 966.457
maxPsun ≔ ――――
r ⋅ phi ⋅ pha
W
――
m2
Vopt101 ≔ 3.3 V
maximum measurable power with 3v3 and 2k2 ohm resistor
Vopt101
= 637.861
maxPsun ≔ ――――
r ⋅ phi ⋅ pha
W
――
m2
resistor required for full power measure at 3v3
Vopt101
= 1.403
phrgain ≔ ―――
phisun
phcgain ≔ 79
kΩ
23 pF
⋅ phrgain = 78.354 pF
pF − ― ――
50 kΩ
mm 2