V I S I B L E D E T E C T O R
CdS photoconductive cell
Resin coating type (5R type)
Standard type designed for general-purpose, wide application
CdS photoconductive cells utilize photoconductive effects in semiconductors that decrease their resistance when illuminated by light. These
sensors are non-polar resistive elements with spectral response characteristics close to the human eye (luminous efficiency), thus making their
operating circuits simple and small.
Features
Applications
Small size, thin package
Low price
Wide range of sensor lineup
Programed electronic shutter and stroboscope light control
for compact camera
Auto dimmer for digital display, CRT and room illumination
Sensor for automatic light on/off
Sensor for electronic toy and teaching aid material
■ Absolute maximum ratings / Characteristics (Typ. Ta=25 °C, unless otherwise noted)
Absolute maximum ratings
Characteristics *1
Cell resistance *2
5
Response time 10
lx *
Peak
Power
dissipation
P
Ambient
sensitivity
wavelength
Supply
voltage
4
*
100
10
g
temperature
Rise time Fall time
tf
10 lx, 2856 K
0 lx *3
Type No.
Ta
tr
lp
Min.
(kW)
Max.
(kW)
20
Min.
(MW)
5.0
100 to 10
lx
(Vdc)
100
(mW)
30
(°C)
-30 to +50
(nm)
620
(ms)
60
(ms)
25
P687-02
5
0.70
P1201-04
P1201-06
P1241-04
P1241-05
P1241-06
P1444
200
100
9
50
-30 to +60
-30 to +60
-30 to +50
540
560
620
50
20
0.90
40
50
40
30
40
10
3
8
0.2
0.5
0.5
5.0
20
0.70
0.70
0.75
50
24
20
30
5
10
48
50
140
100
0.85
P1445
*1: All characteristics are measured after exposure to light (100 to 500 lx) for one to two hours.
*2: The light source is a standard tungsten lamp operated at a color temperature of 2856 K.
*3: Measured 10 seconds after shutting off the 10 lx light.
*4: Typical gamma characteristics (within ±0.10 variations) between 100 lx to 10 lx
log (R100) - log (R10
)
γ 100
=
10
log (E100) - log (E10
)
E100, E10: illuminance 100 lx, 10 lx
R100, R10: resistance at 100 lx and 10 lx respectively
*5: The rise time is the time required for the sensor resistance to reach 63 % of the saturated conductance level (when fully
illuminated). The fall time is the time required for the sensor resistance to decay from the saturated conductance level to
37 %.
1