TSL257T View Datasheet(PDF) - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS
Part Name
Description
MFG CO.
'TSL257T' PDF : 10 Pages View PDF
TSL257T
HIGH-SENSITIVITY
LIGHT-TO-VOLTAGE CONVERTER
TAOS065B − APRIL 2007
PARAMETER MEASUREMENT INFORMATION
Pulse
Generator
LED
(see Note A)
VDD
Ee
2
TSL257T
−
+
1
Input
3
Output
RL
Output
(see Note B)
tr
tf
90%
90%
10%
10%
TEST CIRCUIT
VOLTAGE WAVEFORM
NOTES: A. The input irradiance is supplied by a pulsed AlInGaP light-emitting diode with the following characteristics: λp = 640 nm,
tr < 1 μs, tf < 1 μs.
B. The output waveform is monitored on an oscilloscope with the following characteristics: tr < 100 ns, Zi ≥ 1 MΩ, Ci ≤ 20 pF.
Figure 1. Switching Times
TYPICAL CHARACTERISTICS
PHOTODIODE SPECTRAL RESPONSIVITY
1
TA = 25°C
0.8
0.6
0.4
0.2
0
300 400 500 600 700 800 900 1000 1100
λ − Wavelength − nm
Figure 2
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
80
70
60
50
40
30
20
10
0
10
102
103
104
105
106
f − Frequency − Hz
Figure 3
The LUMENOLOGY r Company
r
r
www.taosinc.com
Copyright E 2007, TAOS Inc.
3
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