Reflective Photosensors (Photo Reflectors)
ON2280
Reflective Photosensor
Unit : mm
Outline
Mark for indicating
emitter side
C0.5
ONN2280 is a small, thin reflective photosensor consisting of a
high efficiency GaAs infrared light emitting diode which is integrated
with a high sensitivity Darlington phototransistor is used as the
photodetector in a single resin package.
1
3
Chip
center
Features
Ultraminiature : 2.7 × 3.4 mm
4-0.7
4-0.5
Visible light cutoff resin is used
High current-transfer ratio
±0.1
0.5
2
4
1.8
0.15
Application
3.4±0.3
Detection of paper, film and cloth
Detection of position and edge
Liquid level sensor
Detection of rotary positioning
Start, end mark detection of magnetic tape
3
4
1
2
Pin connection
Absolute Maximum Ratings (Ta = 25˚C)
Parameter
Symbol Ratings Unit
Reverse voltage (DC)
Forward current (DC)
Power dissipation
Collector current
VR
3
V
mA
mW
mA
V
Input (Light
IF
50
75
30
20
5
emitting diode)
*1
PD
IC
Reflective
Photo
sensors
Collector to emitter voltage VCEO
Emitter to collector voltage VECO
Output (Photo
transistor)
V
*1 Input power derating ratio is
*2
Collector power dissipation PC
75
mW
˚C
1.0 mW/˚C at Ta ≥ 25˚C.
*2 Output power derating ratio is
Operating ambient temperature
Topr –25 to +85
Temperature
Storage temperature
Tstg –30 to +100 ˚C
1.0 mW/˚C at Ta ≥ 25˚C.
Electrical Characteristics (Ta = 25˚C)
Parameter
Symbol
VF
Conditions
min
typ
1.3
max
1.5
Unit
V
Forward voltage (DC)
Reverse current (DC)
Capacitance between terminals
IF = 50mA
VR = 3V
Input
IR
0.01
30
10
µA
pF
characteristics
Ct
VR = 0V, f = 1MHz
Output characteristics Collector cutoff current
ICEO VCE = 10V
1.0
12.0
2.0
µA
mA
µA
V
*1, *2
Collector current
IC
VCC = 5V, IF = 2mA, RL = 100Ω, d = 1mm
0.46
Leakage current
ID
VCC = 5V, IF = 2mA, RL = 100Ω
Transfer
characteristics
Collector to emitter saturation voltage VCE(sat) IF = 5mA, IC = 0.5mA
1.5
Response time
*1 IC classifications
tr*3 , tf*4 VCC = 10V, IC = 1mA, RL = 100Ω
150
µs
*2
Output current Measurement Method
Evaporated Al
Glass plate
(t = 1mm)
Class
Q
R
S
IC (mA)
0.46 to 1.75
1.3 to 4.95
3.15 to 12.0
*3
Time required for the collector current to increase from 10% to 90% of its final value.
RL
*4
90%
10%
IF
IC
VCC
Time required for the collector current to decrease from
90% to 10% of its initial value.
tr
tf
95