burr_brown / opt101
.pdf
|
|
|
+15V |
|
|
|
|
|
|
2 |
|
1 |
|
|
|
|
|
|
|
|
3pF |
|
|
|
|
|
|
|
|
4 |
|
|
|
|
|
|
|
|
1MΩ |
|
|
|
|
|
|
|
|
8pF |
|
+15V |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
V01 |
2 |
7 |
Difference Output |
|
|
|
|
|
5 |
1 |
|
|
|
|
|
|
|
|
|
|
|
||
λ |
|
|
|
RG |
|
6 |
|
50kΩ |
V |
|
|
INA118 |
VOUT |
= (V02 – V01) 1+ |
|||
B |
|
8 |
|
5 |
|
RG |
||
|
|
|
|
|
|
|||
|
|
|
OPT101 |
|
|
|
|
|
|
|
|
3 |
4 |
|
|
|
|
|
8 |
|
3 |
|
|
|
|
|
|
|
|
+15V |
|
–15V |
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
|
1 |
|
|
|
|
|
|
|
|
3pF |
|
|
|
|
|
|
|
|
4 |
+15V |
|
Log of Ratio Measurement |
||
|
|
|
|
|
||||
|
|
|
1MΩ |
|
|
|
(Absorbance) |
|
|
|
|
|
6 |
|
|
|
|
|
|
|
8pF |
100kΩ |
|
|
|
|
|
|
|
|
14 |
|
|
|
|
|
|
|
5 |
100kΩ |
LOG100 |
7 |
VOUT = K log10 (V02/V01) |
|
|
|
|
|
|
|
|
||
λ |
|
|
V02 |
1 |
|
|
|
|
VB |
|
9 |
1nF |
|
|
|
||
|
|
3 |
|
|
||||
|
|
|
|
|
|
|||
|
|
|
OPT101 |
|
|
|
|
|
|
8 |
|
3 |
–15V |
|
|
|
|
|
|
|
|
|
|
|
|
|
NOTE: OPT101 Pin Numbers for DIP Package.
FIGURE 6. Differential Light Measurement.
|
|
|
|
|
+15V |
|
|
|
|
|
2 |
1 |
|
|
|
3.3nF |
|
|
3pF |
|
|
|
|
|
|
|
|
|
|
|
|
|
1MΩ |
4 |
|
|
|
|
|
|
|
+15V |
|
+15V |
|
|
8pF |
|
10kΩ |
|
|
|
|
|
|
|
7 |
|
|
|
|
|
2 |
2 |
270Ω |
|
|
|
|
|
100kΩ |
6 |
|
|
|
|
|
|
|
|
|
||
10V |
OPA627 |
|
LED |
|
5 |
|
|
|
|
||||
REF102 |
3 |
4 |
|
|
|
|
6 |
|
|
|
|
||
4 |
|
–15V |
IN4148 |
VB |
|
|
|
|
|
|
|
||
|
11kΩ |
0.03µF |
|
|
OPT101 |
|
|
|
8 |
3 |
|
||
|
|
|
|
|
Glass Microscope Slide
Approximately 92% light
available for application.
LED |
≈ 8% |
OPT101 |
NOTE: OPT101 Pin Numbers for DIP Package. |
FIGURE 7. LED Output Regulation Circuit.
®
11 |
OPT101 |
|
|