TSL237
HIGH-SENSITIVITY
LIGHT-TO-FREQUENCY CONVERTER
TAOS052J  SEPTEMBER 2008
4
r
r
Copyright E 2008, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
TYPICAL CHARACTERISTICS
Figure 5
OUTPUT FREQUENCY
vs.
VERTICAL ANGULAR DISPLACEMENT
Q  Angular Displacement  ?/DIV>
0
0.2
0.4
0.6
0.8
1.0
90
60
30
0
30
60
90
-Q
+Q
Figure 6
OUTPUT FREQUENCY
vs.
HORIZONTAL ANGULAR DISPLACEMENT
Q  Angular Displacement  ?/DIV>
0
0.2
0.4
0.6
0.8
1.0
90
60
30
0
30
60
90
-Q
+Q
Figure 7
DARK FREQUENCY
vs.
FREE-AIR TEMPERATURE
T
A
  Free-Air Temperature  ?/SPAN>C
7.5
4.5
1.5
1.5
4.5
7.5
25
5
15
35
55
75
6.0
3.0
0.0
3.0
6.0
NOTE A
Figure 8
?SPAN class="pst TSL237SM-LF_2587645_3">  Wavelength of Incident Light  nm
PHOTODIODE RESPONSIVITY TEMPERATURE
COEFFICIENT vs.
WAVELENGTH OF INCIDENT LIGHT
1k
2k
3k
4k
5k
6k
7k
8k
9k
10k
0
11k
600    650   700    750    800   850    900    950   1000
NOTE A:  Internal offsets that result in dark frequency can be both positive and negative. The dashed line represents the case of negative offset
in which an equivalent amount of light signal is required to obtain a non-zero output frequency.
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