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Reflective Object Sensor
Optek Technology
OPB608A/B/C, OPB608R, OPB608V
* * * * *
Phototransistor Output Unfocused for sensing diffuse surface Low Cost Plastic Housing Enhanced signal to noise ratio Reduced ambient light sensitivity
The OPB608 is a reflective switch that consist of an infrared emitting device (LED or VCSEL) and an NPN silicon phototransistor mounted "side-by-side" on a parallel axis in a black opaque plastic housing. Both the emitting device and phototransistor are encapsulated in a visible filtering epoxy except the OPB608R. The phototransistor responds to radiation from the emitter only when a reflective object passes within its field of view. The phototransistor has enhanced low current roll off to improve the contrast ratio and immunity to background irradiance. The LED versions are designed for near field applications with the VCSEL version being designed for longer distances. The OPB608A/B/C devices are designed for applications with reflective distances between 0.050" and 0.375" and when the light pattern is not to be seen by the human eye except for the OPB608R. By utilizing the night enhancement function of a camera, the near infrared light pattern can be seen. This allows the user to see the pattern shining on the reflective object. The OPB608R device is designed for applications with reflective distances between 0.050" and 0.300" and when the light pattern is to be seen by the human eye. The efficiency of the sensor is lower for optical wavelengths in the visible range thus reducing the distance that can be used. The OPB608V device is designed for applications with reflective distances between 0.050" and 1.5" and when the light pattern is not to be seen by the human eye. By utilizing the night enhancement function of a camera, the near infrared light pattern can be seen. This allows the user to see the pattern shining on the reflective object. Reflective distances are dependent upon the drive current for the light emitting device, the wavelength of the light source, and the type of reflective material, therefore each application should be checked for the ability to meet each application.
Ordering Information
OPB608A--880nm LED, IC(ON) 2.0 mA min. OPB608B--880nm LED, IC(ON) 1.0 mA min, 4.0 mA max. OPB608C--880nm LED, IC(ON) 0.5 mA min OPB608R--660nm LED, IC(ON) 1.0 mA min, 6.0 mA max. OPB608V--850nm VCSEL, IC(ON) 5.0 mA min.
Additional laser safety information can be found on the Optek website. See application #221. Classification is not marked on the device due to space limitations. See package outline for centerline of optical radiance. Operating devices beyond maximum rating may cause devices to exceed rated classification
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: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com A subsidiary of TT electronics plc Issue A 06.04
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Absolute Maximum Ratings
TA = 25o C unless otherwise noted
Storage and Operating Temperature Lead Soldering Temperature (1/16" (1.6mm) from case for 5 seconds with soldering iron) -40 C to +85 C 260 C (1)
Infrared-LED (880nm) (OPB608A, OPB608B, OPB608C)
Forward DC Current Peak Forward Current (1s pulse width, 300 pps) Reverse DC voltage Power Dissipation 50 mA 3.0 A 2.0 V 75 mW 50 mA 5.0 V 100 mW
(3) (3)
Visible Red-LED (660nm) (OPB608R)
Forward DC Current Reverse DC voltage Power Dissipation
Infrared-VCSEL (850nm) (OPB608V)
Forward DC Current Reverse DC voltage Power Dissipation 30 mA 5.0 V 75 mW 30 V 10 mA 25 mA 100 mW
(3) (3)
Phototransistor
Collector-Emitter Voltage Emitter Reverse Current Collector DC Current Power Dissipation
Notes: (1) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering. (2) Methanol or isopropanol are recommended as cleaning agents. The plastic housing is soluble in chlorinated hydrocarbons and keytones. (3) Derate Linearly 1.6 mW/C above 25C.
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Issue A 06.04 Page 2 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Electrical Characteristics (TA = 25C unless otherwise noted)
SYMBOL Infrared-LED (880nm)
VF IR Forward Voltage Reverse Current -- -- 1.7 100 V A IF = 20 mA VR = 2.0 V
PARAMETER
MIN
Typ.
MAX
UNITS
CONDITIONS
Visible Red-LED (650nm)
VF VR Forward Voltage Reverse Voltage -- 5.0 1.9 2.5 V V IF = 20 mA IR = 10.0 A
Infrared VCSEL (850)
VF IR Forward Voltage Reverse Current -- -- 2.15 V IF = 12 mA
30 5.5 12
nA mA Deg.
VR = 5 V
ITH Phototransistor
VBR/CEO IECO ICEO
Threshold Current Beam Divergence
2.0
IF = 12 mA
Collector Emitter Breakdown Voltage Emitter Collector Reverse Current Collector Emitter Dark Current
30 -- --
-- 100 100
V A nA
IC = 100 A VEC = 0.4 Volts VCE = 5.0 V, Ee = 0.10 W/cm2, IF=0
Combined
IC(ON) On-State Collector Current OPB608A OPB608B OPB608C OPB608R OPB608V IC(OFF) Off-State Collector Current 2.0 1.0 0.5 1.0 5.0 -- -- 4.0 -- 6.0 -- 100 mA mA mA mA mA nA VCE = 5.0 V, IF = 20 mA No reflective surface VCE = 5.0 V, IF = 20 mA d = 0.110 inch (2.79 mm)(1)(2)
NOTES:
(1) (2) (3)
Distance from the measurement surface to reflective surface (see mechanical page outline). Measured using Eastman Kodak Gray card. The white side of the card uses as a 90% diffuse reflective surface. Reference Eastman Kodak catalog # E152 7795 All parameters are tested using pulse techniques.
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Issue A 06.04 Page 3 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Collector Current vs Object Distance
100.000 Vce=5 Volts, IF = 20 mA Standard Test Conditions 10.000 Ic - Typical Collector Current - mA
1.000 OPB608R OPB608V 0.100 OPB608
0.010
0.001 0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
Distance to Reflectave Surface - Inches
Collector Current vs Diode Forward Current
20 18 16 Ic - Typical Collector Current - mA 14 12 10 8 6 4 2 0 0 10 20 30 40 50 IF - Forward Current - mA
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Vce = 5 Volts Standard Test Conditions
OPB608R OPB608V OPB608
Issue A 06.04 Page 4 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Rise and Fall vs Load Resistance
1000 10% Duty Cycle 1 ms Pulse Width Vce = 5 Volts Standard Test Conditons Tr,Tf - Switching Speed - usec
100
10
OPB608R - Tr OPB608R - Tf OPB608 - Tr OPB608 - Tf OPB608V - Tr OPB608V - Tf
1000
RL - Load resistance - Ohms
1 100
10000
Normalized Collector Current vs Ambient Temperature
140% OPB608R OPB608 OPB608V
120%
Normalized Collector Current - %
100%
80%
60% Standard Test Conditions Vce=5 Volts Normalized to Ta=25 C
40%
20%
0% -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 Ta - Ambient Temperature - C
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com Issue A 06.04 Page 5 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Reletive Response
100 90 80 70 60 50 40 30 20 10 0 OPB608V OPB608 Laserjet Black Inkjet Black Copier Black OPB608R
1200
1000
800
600
400
200
Thermal Paper
0 OPB608 OPB608R
Black Thermal Paper
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Issue A 06.04 Page 6 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Reletive Response
5000 4500 4000 3500 3000 2500 2000 1500 1000 500 0 OPB608V OPB608 OPB608R Gray 18%
White 90%
6000
5000
4000
3000
2000 Inkjet 20% Black 1000 Laserjet 20% Black Laser 20% Black 0 OPB608V OPB608 OPB608R Copier 20% Black
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Issue A 06.04 Page 7 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
Reletive Response
5000 4500 4000 3500 3000 2500 2000 1500 1000 500 Inkjet Cyan 0 OPB608V OPB608 OPB608R Inkjet Magenta Inkjet Green Inkjet Yellow
3000 2500 2000 1500 1000 500 Silver Tape 0 OPB608V OPB608 OPB608R White Plastic
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Issue A 06.04 Page 8 of 9
Reflective Object Sensor
OPB608A, OPB608B, OPB608C, OPB608R, OPB608V
Optek Technology
0.200 [5.08]
0.185 [4.70]
C L
0.087 [2.21]
0.200 [5.08] 0.125 [3.18]
0.250 [6.35]
0.173 [4.39] 0.120 [3.05]
0.100 [2.54]
0.087 [2.21]
Notes: (1) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering. (2) Methanol or isopropanol are recommended as cleaning agents. The plastic housing is soluble in chlorinated hydrocarbons and keytones.
Ordering Information
OPB608A--880nm LED, IC(ON) 2.0 mA min. OPB608B--880nm LED, IC(ON) 1.0 mA min, 4.0 mA max. OPB608C--880nm LED, IC(ON) 1.0 mA min OPB608R--650nm LED, IC(ON) 0.5 mA min, 6.0 mA max. OPB608V--850nm VCSEL, IC(ON) 5.0 mA min.
OPTEK Technology Inc.-- 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (800) 341-4747 FAX: (972) 323- 2396 sensors@optekinc.com www.optekinc.com
Issue A 06.04 Page 9 of 9

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