Single Emitter Bar Code Optic Head
OTBC-04XX Series
(OTR480/490/482)
FEATURES:
•
•
•
•
Single Emitter Bar Code / Fine Line Sensor
Better than 0.010” Resolution
Compact Size
Easily Ganged for Multiple Channels
PRODUCT DESCRIPTION
The OTBC-04XX series combine a single emitter with
a phototransistor in a compact low cost package
containing a lens and aperture. The OTBC-0480 has a
940 nm infrared emitter and a phototransistor. The
OTBC-0490 has a 660 nm visible red emitter and a
phototransistor. The OTBC-0482 has a 940 nm
infrared emitter and a phototransistor with an ambient
light filter, for use in high ambient light conditions. These devices are easily ganged for multi-channel
applications. Consult factory for custom apertures, emitters, or sensors.
Absolute Maximum Ratings
General
Storage Temperature Range------------------------------------------------------------------------------------------------------------------ - 55°C to +100°C
Operating Temperature Range ----------------------------------------------------------------------------------------------------------------- - 40°C to +85°C
Lead Soldering Temperature (1/16” from case
for 5 seconds soldering iron, 10 seconds flow soldering)--------------------------------------------------------------------------------------------- 260°C
Infrared Emitter (940 nm)
Reverse Voltage ---------------------------------------------------------------------------------------------------------------------------------------------------- 5 V
Continuous Forward Current ------------------------------------------------------------------------------------------------------------------------------ 120 mA
Peak Forward Current ------------------------------------------------------------------------------------------------------------------------------------------ 1.5 A
Power Dissipation ------------------------------------------------------------------------------------------------------------------------------------------- 100 mW
Visible Emitter (660 nm)
Reverse Voltage ---------------------------------------------------------------------------------------------------------------------------------------------------- 4 V
Continuous Forward Current ------------------------------------------------------------------------------------------------------------------------------- 40 mA
Peak Forward Current --------------------------------------------------------------------------------------------------------------------------------------- 300 mA
Power Dissipation ------------------------------------------------------------------------------------------------------------------------------------------- 100 mW
Phototransistor
Collector-Emitter Voltage --------------------------------------------------------------------------------------------------------------------------------------- 30 V
Emitter-Collector Voltage ----------------------------------------------------------------------------------------------------------------------------------------- 5 V
Power Dissipation (Derate 2.4 mW/°C above 25°C) ----------------------------------------------------------------------------------------------- 100 mW
RHOPOINT COMPONENTS LTD
Holland Road, Hurst Green, Oxted, Surrey, RH8 9AX
Tel: +44 (0)1883 717988 Fax: +44 (0)1883 712938
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Single Emitter Bar Code Optic Head
OTBC-04XX Series
(OTR480/490/482)
Product Specifications (T
A
= 25°C unless noted)
Infrared Emitter (OTBC-048X)
Parameter
Forward Voltage (I
F
= 50 mA)
Reverse Current (V
R
= 5 V)
Peak Wavelength (I
F
= 20 mA)
Radiant Intensity (I
F
= 20 mA)
Spectral Bandwidth at 50% (I
F
= 20 mA)
Half Intensity Beam Angle
Visible Emitter (OTBC-049X)
Parameter
Forward Voltage (I
F
= 20 mA)
Reverse Current (V
R
= 4 V)
Peak Wavelength (I
F
= 20 mA)
Luminous Intensity (I
F
= 20 mA)
Spectral Bandwidth at 50% (I
F
= 20 mA)
Half Intensity Beam Angle
Phototransistor (OTBC-04X0)
Parameter
2
Light Current (Ee=0.1mW/cm , V
CE
=5V)
Dark Current (Ee=0, V
CE
=10V)
2
Saturation Voltage (I
C
=0.5mA, Ee=0.1mW/cm )
Rise Time (V
CC
=5V, R
L
=1kΩ, I
C
=1mA)
Fall Time (V
CC
=5V, R
L
=1kΩ, I
C
=1mA)
Coupled Characteristics
Parameter
Symbol
Min
Typ
1
Light Current (I
F
= 20 mA, V
CE
= 5V, d = 0.125 in)
I
CE(ON)
5
10
Dark Current (I
F
= 0 mA, V
CE
= 5V)
I
CE0
6 dB Bandwidth
3
1
Reflecting surface is Eastman Kodak neutral white test card having a 90% diffused reflectance.
Reflective Surface
Parameter
Element Contrast
Diffused Reflectance
Element Width
Narrow Element to Narrow Space Ratio
Depth of Field
Symbol
Min
(80%)
(90%)
0.010
0.090
Typ
Max
Units
%
%
in
in
Max
200
Units
µA
nA
kHz
Symbol
I
CE(ON)
I
CE0
V
CE(SAT)
T
r
T
f
Min
1
Typ
2.8
Max
100
0.4
15
15
Units
mA
nA
V
µs
µs
Symbol
V
F
I
R
λ
P
I
V
∆λ
θ
Min
Typ
1.8
660
500
20
10
Max
2.4
100
Units
V
µA
nm
mcd
nm
Degrees
Symbol
V
F
I
R
λ
P
I
∆λ
θ
Min
Typ
1.3
940
2.5
50
10
Max
1.45
100
Units
V
µA
nm
mW/sr
nm
Degrees
1.3
250
W
N
d
0.95
0.125
0.160
RHOPOINT COMPONENTS LTD
Holland Road, Hurst Green, Oxted, Surrey, RH8 9AX
Tel: +44 (0)1883 717988 Fax: +44 (0)1883 712938
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Email: sales@rhopointcomponents.com Web: www.rhopointcomponents.com
Single Emitter Bar Code Optic Head
OTBC-04XX Series
(OTR480/490/482)
Suggested Application Circuit
The above circuit represents an adaptive dual peak detector with a first stage transimpedance amplifier. This circuit is
recommended for typical bar code or fine element sensing applications using the OTBC-04XX series optic heads. The first amplifier
servers as a current-to-voltage amplifier (transimpedance). The second part of the circuit provides positive and negative peak
detection. The peak voltages are temporarily stored in the 0.1
µF
capacitors. The comparator reference is approximately 45% of
the peak-to-peak amplitude. This, in effect, provides an adaptive threshold to the comparator based on the voltage peaks of the
incoming signal. The 2.2 MΩ resistor on the last stage (indicated with an *) sets the positive feedback, and combined with the 10 kΩ
input resistor the hysterisis is set to approximately 25 mV. Setting the 2.2 MΩ resistor to 100 kΩ will increase the hysterisis to 500
mV, but response will be sacrificed. V
out
is low for reflectance and high (+5V) for no reflectance (i.e., sensing a dark mark).
Ordering Information
OTBC-04X X-XX
Emitter:
(8) 940 nm Infrared
(9) 660 nm Visible Red
Aperture Size:
(0) 0.006” x 0.090”
(C) Custom
Number of Channels:
(1) 1 channel
(2) 2 channels
(NN) NN channels
Note: Test capability to better than 0.003”
channel-to-channel alignment available.
Sensor:
(0) Phototransistor
(2) Phototransistor w/ ambient filter
Note: Option 2 available with infrared emitter only.
RHOPOINT COMPONENTS LTD
Holland Road, Hurst Green, Oxted, Surrey, RH8 9AX
Tel: +44 (0)1883 717988 Fax: +44 (0)1883 712938
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of
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Email: sales@rhopointcomponents.com Web: www.rhopointcomponents.com
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