TSL245R
INFRARED LIGHT-TO-FREQUENCY CONVERTER
TAOS060D
−
SEPTEMBER 2007
TYPICAL CHARACTERISTICS
OUTPUT FREQUENCY
vs
IRRADIANCE
1000
V
DD
= 5 V
λ
p
= 940 nm
T
A
= 25°C
Relative Responsivity
1
T
A
= 25°C
0.8
PHOTODIODE SPECTRAL RESPONSE
Output Frequency (f
O
−
f
D
) — kHz
100
10
0.6
1
0.4
0.1
0.01
0.2
0.001
0.001
0.01
0.1
1
10
100
1000
0
600
700
E
e
−
Irradiance
−
μW/cm
2
800
900
1000
λ
−
Wavelength
−
nm
1100
Figure 1
DARK FREQUENCY
vs
TEMPERATURE
1.2
V
DD
= 5 V
E
e
= 0
Normalized Output Frequency
1.010
Figure 2
OUTPUT FREQUENCY
vs
SUPPLY VOLTAGE
V
DD
= 5 V
T
A
= 25°C
f
O
= 20 kHz
1
f
O(dark)
— Dark Frequency — Hz
1.005
0.8
1.000
0.6
0.995
0.4
0.990
0.2
0.985
0
−25
0
25
50
T
A
−
Temperature
−
°C
75
0.980
2.5
3
3.5
4
4.5
V
DD
−
Supply Voltage
−
V
5
5.5
Figure 3
Figure 4
The
LUMENOLOGY
r
Company
r
r
Copyright
E
2007, TAOS Inc.
www.taosinc.com
3
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
