OPB739RWZ - OPTEK Technology

Reflective Line Reader Sensor
Type OPB739RWZ
Features:
•
•
•
•
•
•
Focused for maximum sensitivity
Phototransistor Output
650nm Visible Red LED to optimize detection of dye based inks
Low-cost plastic housing
24” minimum 26AWG wire leads
Optimal operating distance range 0.015” [.38mm] to 0.045” [1.14mm]
Description:
The OPB739RWZ is a reflective line reader sensor. The sensor utilizes a visible red (650nm) LED and an NPN silicon
phototransistor mounted side by side on converging optical axes in a black plastic housing. The converging light beam
makes this sensor capable of detecting line widths as small as 0.004” [0.1mm] at the optimum distance of 0.030” [0.76mm]
from the target. The red LED maximizes the reflected signal contrast of black lines on white backgrounds. Recommended
line spacing is .050” minimum.
This sensor can be used with Optek’s OCB100CZ auto calibration module to reduce variability from sensor to sensor and to
achieve a digital output.
Custom electrical, wire, cabling and connectors are available. Contact your local representative or OPTEK for more
information.
Applications:
• Line Reading
• Low Resolution Bar Code
Sensing
• Paper edge detection
• Mark detection
• Reflective Optical Encoders
RoHS
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 [email protected] www.optekinc.com
Issue A.2 1/11
Page 1 of 4
Reflective Line Reader Sensor
Type OPB739RWZ
Absolute Maximum Ratings (TA=25°C unless otherwise noted)
Storage and Operating Temperature Range
-40° C to +85° C
Input LED
Forward DC Current
40 mA
Reverse DC Voltage
2V
Power Dissipation
100 mW
Output Phototransistor
Collector-Emitter Voltage
30 V
Emitter-Collector Voltage
5V
Power Dissipation
100 mW
Electrical Characteristics (TA = 25°C unless otherwise noted)
SYMBOL
PARAMETER
MIN
TYP
MAX
UNITS
TEST CONDITIONS
Input IR LED
VF
Forward Voltage
1.2
2.0
2.3
V
IF = 20 mA
IR
Reverse Current
-
-
100
µA
VR = 2 V
λP
Peak Emission Wavelength
-
650
-
nm
IF = 20mA
Output Phototransistor
V(BR)CE0
Collector Emitter Breakdown Voltage
30
-
-
V
IC = 100 µA
V(BR)ECO
Emitter Collector Breakdown Voltage
5
-
-
v
IE = 100 µA
Collector Dark Current
-
-
100
nA
VCE = 10 V, IF = 0
Tr
Rise Time
-
300
-
µs
Tf
Fall Time
-
300
-
µs
VCE = 5 Volts (3)
IC = 1 mA
RL = 20KΩ
0.25
-
-
mA
d = 0.030” (.76 mm) (1)(2)
IF = 20 mA, VCE = 5 V
Collector Emitter Saturation Voltage
-
-
0.4
V
d = 0.030” (.76 mm) (1)(2)
IC = 50 µA, IF = 20 mA
Crosstalk Collector Current
-
-
0.05
mA
ICEO
Coupled Characteristics
I C(ON)
V CE(SAT)
I CX
On-State Collector Current
IF = 20 mA, VCE = 5 V
No reflective test surface present
Notes:
1. “d” is the distance from the assembly’s lens surface to the reflective surface.
2. Measured using 90% diffuse reflectance white test card as the reflecting surface.
3. Typical values by design. Rise and Fall times are not tested.
4. Methanol or Isopropanol are recommended as cleaning agents. Plastic housing is soluble in chlorinated hydrocarbons
and ketones.
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 [email protected] www.optekinc.com
Issue A.2 1/11
Page 2 of 4
Reflective Line Reader Sensor
Type OPB739RWZ
Typical Drive Circuit
Example reflective target with
0.004”, 0.008”, and .012” line
widths spaced 0.050” apart
Adjust LED drive to obtain an
output voltage of approximately
4 volts when reflective target is
in position and when line to
detect is not in the sensors field
of view
Typical Output Voltage vs Time
Line Spacing = .050" Paper Speed = 50 inches / second
4.5
Output (Volts)
4.0
3.5
3.0
2.5
0.004" Lines
2.0
0.008" Lines
1.5
1.0
0.012" Lines
0.5
0.0
0
1
2
3
4
5
6 7 8
Time (mS)
9 10 11 12 13 14
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 [email protected] www.optekinc.com
Issue A.2 1/11
Page 3 of 4
Reflective Line Reader Sensor
Type OPB739RWZ
Typical Performance Curves
VF vs. IF vs Temperature
Relative Ic(on) vs Temperature
2.4
Typical
1.2
2.3
1.0
Relative Output Current
Forward Voltage (VF)
2.2
20°C
2.1
10°C
2.0
0°C
50°C
30°C
1.9
80°C
1.8
1.7
1.6
1.5
5
10
15
20
25
LED Drive (mA)
30
35
40
0.8
0.6
0.4
0.2
0.0
0
20
40
Temperature (°C)
60
80
Output Current vs. Distance
1.2
Relative Output Current
1.0
0.8
0.6
0.4
0.2
0.0
0.00
0.01
0.02
0.03 0.04 0.05
Distance (inches)
0.06
0.07
0.08
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747
FAX: (972) 323-2396 [email protected] www.optekinc.com
Issue A.2 1/11
Page 4 of 4