IS485 Просмотр технического описания (PDF) - Sharp Electronics
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IS485 Datasheet PDF : 4 Pages
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Fig. 7 Propagation Delay Time vs.
Illuminance
12
11 VCC = 5V
RL= 280Ω
1
10 Ta= 25˚C
9
8
7
6
5
4
3
2
2
1
1 t PLH (IS485 ) 2 t PHL( IS485)
t PHL (IS486 ) t PLH( IS486)
0
0 100 200 300 400 500 600
Illuminance E V ( lx )
Test Circuit for Response Time (IS485 )
Voltage regulator
Vcc = 5V
Input
tr = tf = 0.01 µ s
Zo = 50 Ω
47 Ω
Amp.
15k Ω
RL
Output
0.01 µ F
Input
50%
tPHL
Output
tr
Fig. 9 Sensitivity Diagram
- 20˚ -10˚ 0
100
- 30˚
80
tPLH
VOH
90%
10% 1.5V
tf
( Ta = 25˚C )
+10˚ +20˚
+30˚
60
- 40˚
+40˚
- 50˚
40
+50˚
- 60˚
+60˚
20
- 70˚
+70˚
- 80˚
+80˚
- 90˚
+90˚
0
Angular displacement θ
q Please refer to the chapter “Precautions for Use.”
IS485/IS486
Fig. 8 Rise Time, Fall Time vs.
Load Resistance
0.8
Ta= 25˚C
0.7
VCC = 5V
E V = 50 lx
0.6
0.5
0.4
tr
0.3
0.2
0.1
tf
0
0.1 0.2 0.5 1 2
5 10 20 50
Load resistance R L ( k Ω )
Test Circuit for Response Time
Voltage regulator
(IS486 )
Vcc = 5V
Input
tr = tf = 0.01 µ s
Zo = 50 Ω
47 Ω
Amp.
10k Ω
RL
Output
0.01 µ F
Input
Output
tPLH
tr
50%
tPHL
90% VOH
1.5V 10%
tf
VOL
Fig.10 Spectral Sensitivity
100
90 Ta = 25˚C
80
70
60
50
40
30
20
10
0
400 500 600 700 800 900 1000 1100 1200 1300 1400
Wavelength λ ( nm )
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