OTR490-01-C - Opto Technology, Inc.

Single Emitter Bar Code Optic Head OTR480/490/482

562 Chaddick Drive, Wheeling, IL 60090

Phone: (847) 537-4277 FAX: (847) 537-4785

OPTO TECHNOLOGY, INC.

REV. O (10/97)

FEATURES:

• • Single Emitter Bar Code / Fine Line Sensor

• • Better than 0.010” Resolution

• Compact Size

• Easily Ganged for Multiple Channels

PRODUCT DESCRIPTION

The OTR480/490/482 series combine a single emitter with a phototransistor in a compact low cost package containing a lens and

aperture. The OTR480 has a 940 nm infrared emitter and a phototransistor. The OTR490 has a 660 nm visible red emitter and a

phototransistor. The OTR482 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

Single Emitter Bar Code Optic Head OTR480/490/482

562 Chaddick Drive, Wheeling, IL 60090

Phone: (847) 537-4277 FAX: (847) 537-4785

OPTO TECHNOLOGY, INC.

REV. O (10/97)

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

Product Specifications (TA = 25°°C unless noted)

Infrared Emitter

Parameter Symbol Min Typ Max Units

Forward Voltage (IF = 50 mA) VF1.3 1.45 V

Reverse Current (VR = 5 V) IR100 µA

Peak Wavelength (IF = 20 mA) λP940 nm

Radiant Intensity (IF = 20 mA) I1.3 2.5 mW/sr

Spectral Bandwidth at 50% (IF = 20 mA) ∆λ50 nm

Half Intensity Beam Angle θ10 Degrees

Visible Emitter

Parameter Symbol Min Typ Max Units

Forward Voltage (IF = 20 mA) VF1.8 2.4 V

Reverse Current (VR = 4 V) IR100 µA

Peak Wavelength (IF = 20 mA) λP660 nm

Luminous Intensity (IF = 20 mA) IV250 500 mcd

Spectral Bandwidth at 50% (IF = 20 mA) ∆λ20 nm

Half Intensity Beam Angle θ10 Degrees

Phototransistor

Parameter Symbol Min Typ Max Units

Light Current (Ee=0.1mW/cm2, VCE=5V) ICE(ON) 12.8 mA

Dark Current (Ee=0, VCE=10V) ICE0 100 nA

Saturation Voltage (IC=0.5mA, Ee=0.1mW/cm2)VCE(SAT) 0.4 V

Rise Time (VCC=5V, RL=1kΩ, IC=1mA) Tr15 µs

Fall Time (VCC=5V, RL=1kΩ, IC=1mA) Tf15 µs

Coupled Characteristics

Parameter Symbol Min Typ Max Units

Light Current (IF = 20 mA, VCE = 5V, d = 0.125 in)1ICE(ON) 5 10 µA

Dark Current (IF = 0 mA, VCE = 5V) ICE0 200 nA

6 dB Bandwidth 3kHz

1 Reflecting surface is Eastman Kodak neutral white test card having a 90% diffused reflectance.

Reflective Surface

Parameter Symbol Min Typ Max Units

Element Contrast (80%) %

Diffused Reflectance (90%) %

Element Width WN0.010 in

Narrow Element to Narrow Space Ratio 0.95

Depth of Field d0.090 0.125 0.160 in

Single Emitter Bar Code Optic Head OTR480/490/482

562 Chaddick Drive, Wheeling, IL 60090

Phone: (847) 537-4277 FAX: (847) 537-4785

OPTO TECHNOLOGY, INC.

REV. O (10/97)

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 OTR480/490 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. Vout

is low for reflectance and high (+5V) for no reflectance (i.e., sensing a dark mark).

Ordering Information

OTR4 X X - N N - 0

Emitter:

(8) 940 nm Infrared

(9) 660 nm Visible Red

Number of Channels:

(01) 1 channel

(02) 2 channels

(NN) NN channels

Note: Test capability to better than 0.003”

channel-to-channel alignment available.

Aperture Size:

(0) 0.006” x 0.090”

Sensor:

(0) Phototransistor

(2) Phototransistor w/ ambient filter

Note: Option 2 available with infrared emitter only.