Optek Technology

OPTEK Technology Inc.--

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323 2396 sensors@optekinc.com www.optekinc.com

Reflective Object Sensor

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 re-
flective material, therefore each application should be checked for the ability to meet each application.

Optek reserves the right to make changes at any time in order to improve design and to supply the best product possible.

Issue A 06.04

A subsidiary of

TT electronics plc

Ordering Information

OPB608A--880nm LED, I

C(ON)

2.0 mA min.

OPB608B--880nm LED, I

C(ON)

1.0 mA min, 4.0 mA max.

OPB608C--880nm LED, I

C(ON)

0.5 mA min

OPB608R--660nm LED, I

C(ON)

1.0 mA min, 6.0 mA max.

OPB608V--850nm VCSEL, I

C(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 de-

vices beyond maximum rating may cause de-

vices to exceed rated classification

Optek Technology

OPTEK Technology Inc.--

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323 2396 sensors@optekinc.com www.optekinc.com

Absolute Maximum Ratings

= 25

C unless otherwise noted

Storage and Operating Temperature

-40° C to +85° C

Lead Soldering Temperature (1/16" (1.6mm) from case for 5 seconds with soldering iron)

260

° C

(1)

Infrared-LED (880nm)

(OPB608A, OPB608B, OPB608C)

Forward DC Current

50 mA

Power Dissipation

75 mW

(3)

Reverse DC voltage

2.0 V

Peak Forward Current (1µs pulse width, 300 pps)

3.0 A

Infrared-VCSEL (850nm)

(OPB608V)

Forward DC Current

30 mA

Reverse DC voltage

5.0 V

Power Dissipation

75 mW

(3)

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 25°C.

Phototransistor

Collector-Emitter Voltage

30 V

Emitter Reverse Current

10 mA

Collector DC Current

25 mA

Power Dissipation

100 mW

(3)

Visible Red-LED (660nm)

(OPB608R)

Forward DC Current

50 mA

Reverse DC voltage

5.0 V

Power Dissipation

100 mW

(3)

Reflective Object Sensor

OPB608A, OPB608B, OPB608C, OPB608R, OPB608V

Issue A 06.04

Page 2 of 9

Optek Technology

Reflective Object Sensor

OPB608A, OPB608B, OPB608C, OPB608R, OPB608V

OPTEK Technology Inc.--

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323 2396 sensors@optekinc.com www.optekinc.com

Electrical Characteristics

= 25

°C unless otherwise noted)

Issue A 06.04

Page 3 of 9

SYMBOL

PARAMETER

MIN

Typ. MAX UNITS

CONDITIONS

Infrared-LED (880nm)

Forward Voltage

1.7

= 20 mA

Reverse Current

100

µA

= 2.0 V

Visible Red-LED (650nm)

Forward Voltage

1.9

2.5

= 20 mA

Reverse Voltage

5.0

= 10.0 µA

Infrared VCSEL (850)

Forward Voltage

2.15

= 12 mA

Reverse Current

= 5 V

Threshold Current

2.0

5.5

Beam Divergence

Deg.

= 12 mA

Phototransistor

CEO

Collector Emitter Breakdown Voltage

= 100 µA

ECO

Emitter Collector Reverse Current

100

µA

= 0.4 Volts

CEO

Collector Emitter Dark Current

100

= 5.0 V, Ee = 0.10 µW/cm

C(ON)

On-State Collector Current

OPB608A
OPB608B

OPB608C

OPB608R

OPB608V

2.0
1.0
0.5

1.0

5.0

4.0

6.0

mA
mA
mA

= 5.0 V, I

= 20 mA

d = 0.110 inch (2.79 mm)

(1)(2)

C(OFF)

Off-State Collector Current

100

= 5.0 V, I

= 20 mA

No reflective surface

Combined

NOTES:

(1) Distance from the measurement surface to reflective surface (see mechanical page outline).
(2) 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

(3) All parameters are tested using pulse techniques.

Optek Technology

OPTEK Technology Inc.--

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323 2396 sensors@optekinc.com www.optekinc.com

Reflective Object Sensor

OPB608A, OPB608B, OPB608C, OPB608R, OPB608V

Issue A 06.04

Page 4 of 9

Collector Current vs Object Distance

0.001

0.010

0.100

1.000

10.000

100.000

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

Ic - Typical Collector Current - mA

OPB608R
OPB608V
OPB608

Vce=5 Volts, I

= 20 mA

Standard Test Conditions

Collector Current vs Diode Forward Current

- Forward Current - mA

Ic - Typical Collector Current - mA

OPB608R
OPB608V
OPB608

Vce = 5 Volts
Standard Test Conditions

Optek Technology

OPTEK Technology Inc.--

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323 2396 sensors@optekinc.com www.optekinc.com

Reflective Object Sensor

OPB608A, OPB608B, OPB608C, OPB608R, OPB608V

Rise and Fall vs Load Resistance

100

1000

100

1000

10000

RL - Load resistance - Ohms

Tr,Tf - Switching Speed - usec

OPB608R - Tr
OPB608R - Tf
OPB608 - Tr
OPB608 - Tf
OPB608V - Tr
OPB608V - Tf

10% Duty Cycle
1 ms Pulse Width
Vce = 5 Volts
Standard Test Conditons

Normalized Collector Current vs Ambient Temperature

20%

40%

60%

80%

100%

120%

140%

-40

-30

-20

-10

100

Ta - Ambient Temperature - °C

Normalized Collector Current - %

OPB608R
OPB608
OPB608V

Standard Test Conditions
Vce=5 Volts
Normalized to Ta=25 °C

Issue A 06.04

Page 5 of 9

Optek Technology

OPTEK Technology Inc.--

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (800) 341-4747 FAX: (972) 323 2396 sensors@optekinc.com www.optekinc.com

Reflective Object Sensor

OPB608A, OPB608B, OPB608C, OPB608R, OPB608V

Issue A 06.04

Page 9 of 9

Ordering Information

OPB608A--880nm LED, I

C(ON)

2.0 mA min.

OPB608B--880nm LED, I

C(ON)

1.0 mA min, 4.0 mA max.

OPB608C--880nm LED, I

C(ON)

1.0 mA min

OPB608R--650nm LED, I

C(ON)

0.5 mA min, 6.0 mA max.

OPB608V--850nm VCSEL, I

C(ON)

5.0 mA min.

0.100 [2.54]

0.087 [2.21]

0.120 [3.05]

0.200 [5.08]

0.185 [4.70]

0.200 [5.08]

0.125 [3.18]

0.173 [4.39]

0.250 [6.35]

0.087 [2.21]

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: OPB608A