TSL12S, TSL13S, TSL14S
LIGHT-TO-VOLTAGE CONVERTERS
TAOS051E − SEPTEMBER 2007
4
r
r
Copyright E 2007, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
PARAMETER MEASUREMENT INFORMATION
OUTPUT VOLTAGE WAVEFORM (See Note B)
TEST CIRCUIT
Peak E
e
10%
Min V
O
t
r
TSL1xS
R
L
V
DD
2
1
3
+
−
Output
Pulse
Generator
LED
(see Note A)
90%
NOTES: A. The input irradiance is supplied by a pulsed AlInGaP light-emitting diode with the following characteristics: λ
p
= 640 nm,
t
r
< 1 μs, t
f
< 1 μs.
B. The output waveform is monitored on an oscilloscope with the following characteristics: t
r
< 100 ns, Z
i
≥ 1 MΩ, C
i
≤ 20 pF.
Figure 1. Switching Times
t
dr
10%
90%
t
df
t
f
Peak V
O
Min E
e
Input
TYPICAL CHARACTERISTICS
Figure 2
PHOTODIODE SPECTRAL RESPONSIVITY
λ − Wavelength − nm
400 500 600 700 800 900 1000 1100300
0
0.2
0.4
0.6
0.8
1
Relative Responsivity
Figure 3
θ − Angular Displacement
80° 60° 40° 20° 0° 80°60°40°20°
Optical Axis
NORMALIZED OUTPUT VOLTAGE
vs
ANGULAR DISPLACEMENT
0
0.2
0.4
0.6
0.8
1
Normalized Output Voltage
