VISIBLE DETECTOR
CdS photoconductive cell
Resin coating type (7R,10R type)
Standard type designed to withstand high voltage and high power
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
l
Small size, thin substrate
l
Low price
l
Suitable for high voltage and high power application
l
Auto dimmer for digital display, CRT and room illumination
l
Automatic light on/off sensor
l
Sensor for electronic toy and teaching aid material
s
Absolute maximum ratings / Characteristics (Typ. Ta=25 擄C, unless otherwise noted)
Peak
Power Ambient
sensitivity
Supply
Dimensional
dissipation
temperature
wavelength
10
lx,
2856 K
voltage
outline
P
Ta
位p
Min.
Max.
(Vdc)
(mW)
(擄C)
(nm)
(k鈩?
(k鈩?
200
100
200
100
200
200
100
50
150
100
150
100
300
100
-30 to +50
-30 to +60
-30 to +70
-30 to +60
620
560
550
560
550
560
550
4.4
2.5
50
3.5
23
12
2.8
13
7.5
150
14
67
36
8.4
Absolute maximum ratings
Characteristics *
1
Resistance *
2
0
lx
*
3
Min.
(M鈩?
20
0.5
20
0.5
20
0.5
緯
100
*
4
10
Response time 10
lx
*
5
Rise time Fall time
tr
tf
(ms)
35
50
40
50
30
50
(ms)
20
40
10
40
10
40
Type No.
7R type
P380-7R
P722-7R
P1195
P1202-12
P1202-16
10R type
P722-10R
P1096-06
100 to 10
lx
0.85
0.70
0.90
0.70
0.90
0.70
0.75
鉃€
鉃?/div>
-30 to +60
*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 removal of light of 10
lx.
*4: Typical gamma characteristics (within 鹵0.10 variations) between 100
lx
to 10
lx
緯
100
=
10
log (R
100
) - log (R
10
)
log (E
100
) - log (E
10
)
E
100
, E
10
: illuminance 100
lx,
10
lx
R
100
, R
10
: 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 (resistance when
fully illuminated). The fall time is the time required for the sensor resistance to decay from the saturated conductance level to
37 %.
1
2
