Infrared Components
Ceramic Discrete Surface Mount Emitters and
Detectors
FEATURES
•
Small package size
•
Glass lensed optics for
efficient optical coupling
•
Upright or inverted mounting
capability
•
Low profile, small size for
flexible layout of multiple
channels and custom arrays
•
Compatible with automated
solder processes:
- IR reflow
- vapor phase
- solder wave
- convection oven
•
Choice of photodiode or
phototransistor detectors
•
IRED features high power
dissipation capability
•
Tape and reel packaging
option
−
pick and place
machine compatible
APPLICATIONS
•
Optical encoders for motion
control
•
Computer peripherals
•
Vending and point-of-sale
applications
•
Smoke detectors
•
Medical equipment
SME/SMD Series
The SME2470, SMD2440 and SMD2420 Series surface mount
infrared components are small ceramic packages (0.15 x 0.10 x
0.083 in. / 3,81 x 2,54 x 2,1 mm) with glass lenses. The lens minimizes
cross talk and often eliminates the need for apertures in non-critical
applications. The low profile components may be mounted on the
printed circuit board, lens up or inverted, allowing flexibility in layouts for
multiple channel and custom arrays. When mounted lens down over a
hole in the PC board, the lens is hidden, lowering overall package
height.
The SME2470 is a high intensity aluminum gallium arsenide infrared
emitting diode (IRED) which can be used with either the SMD2440
phototransistor or the SMD2420 photodiode. It supplies optimum optical
characteristics and efficient optical coupling. The small size and high
power dissipation properties of the IRED promote PC board
miniaturization and high density placement.
The SMD2440 Series phototransistor’s gain characteristics make it
useful for applications requiring high responsivity. The SMD2420 Series
photodiode is especially useful in applications requiring linear response
or high switching speed.
These components are available in bulk, or on tape and reel for use
with automatic placement equipment.
Honeywell
Sensing and Control
Infrared Components
Ceramic Discrete Surface Mount
SME2470 SERIES IRED ABSOLUTE MAXIMUM RATINGS
Power dissipation @ 25 °C*
Continuous forward current
Reverse voltage (I
F
= 10 µA)
Operating free air temperature range
Storage temperature
Soldering temperature
150 mW
75 mA (mounted on a PC board)
3V
-55° to +125°C (-67° to +257°F)
-65° to +150°C (-85° to +302°F)
260°C (500°F), 5 seconds max.
SME/SMD Series
CAUTION
STRESS DAMAGE
Functional operation of the device at
or above “Absolute Maximum Ratings”
for extended periods of time may
affect reliability.
Failure to comply with these
instructions may result in product
damage.
*Derate 1.43 mW/°C above 25°C ambient.
SME2470 SERIES IRED ELECTRICAL CHARACTERISTICS (at 25°C unless otherwise noted)
Parameter
Irradiance
Test Conditions
Measured into 0.104 in. (2.64 mm) dia.
aperture @ 0.535 in. (13.59 mm) from
lens tip. I
F
= 50 mA
I
F
= 50 mA
I
R
= 10 µA
I
F
= 50 mA
I
F
= 50 mA
10 µsec pulse width
Sym.
H
Min.
0.6
Typ.
Max.
Units
2
mW/cm
Forward voltage
Reverse breakdown voltage
Peak output wavelength
Spectral bandwidth
Rise time
Fall time
V
F
BV
R
λ
t
R
t
F
3.0
1.5
880
80
800
700
1.8
Volts
Volts
nm
nm
ns
ns
TYPICAL IRED PERFORMANCE CHARACTERISTICS
SME2470 Irradiance vs Angular Displacement
SME2470 Spectral Bandwidth
100%
100%
Relative Irradiance
60%
Relative Irradiance
800
840
880
920
960
1000
80%
80%
60%
40%
40%
20%
0%
760
20%
0%
-30
-20
-10
0
10
20
30
Wavelength - nm
Angular Displacement - Degrees
2
Honeywell
•
Sensing and Control
For application help: call 1-800-537-6945
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
TYPICAL IRED PERFORMANCE CHARACTERISTICS (when solder mounted to PC board)
SME2470 Forward Current vs Forward Voltage
1.6
1.5
SME2470 Forward Voltage vs Temperature
1.55
1.50
1.4
1.3
1.2
1.1
1.0
0
20
40
60
80
100
Forward Voltage - V
Forward Voltage - V
1.45
1.40
1.35
1.30
-55
-10
35
80
125
Forward Current - mA
Temperature - C
SME2470 Irradiance vs Temperature
200%
SME2470 Irradiance vs Forward Current
100%
Normalized Irradiance
160%
Relative Irradiance
80%
120%
60%
80%
40%
40%
0%
-55
20%
0%
-10
35
80
125
0
10
20
30
40
50
60
70
Temperature - C
Forward Current - mA
For application help: call 1-800-537-6945
Honeywell
•
Sensing and Control
3
Infrared Components
Ceramic Discrete Surface Mount
SMD2440 SERIES PHOTOTRANSISTOR ABSOLUTE MAXIMUM
RATINGS
Collector-Emitter voltage
Emitter-Collector voltage
Continuous device dissipation*
Operating free air range
Storage temperature
Soldering temperature
30 V
5V
125 mW
-55° to +125°C (-67° to +257°F)
-65° to +150°C (-85° to +302°F)
260°C (500°F), 5 seconds max.
SME/SMD Series
*Derate 1.43 mW/°C above 25°C ambient.
SMD2440 SERIES PHOTOTRANSISTOR ELECTRICAL CHARACTERISTICS
Parameter
Light current
Dark current
Collector breakdown voltage
Emitter breakdown voltage
Saturation voltage (C to E)
Peak response wavelength
Rise time
Fall time
V
CC
= 5 V, R
L
= 1000
Ω,
I
L
= 1 mA
-0X1
-0X2
Test Conditions
V
CE
= 5 V, H = 1 mW/cm ,
880 nm light source
V
CE
= 10 V, H = 0
I
C
= 100 µA, H = 0
I
E
= 100 µA, H = 0
I
C
= 0.04 mA, H = 1 mW/cm
2
2
Sym.
I
L
I
D
BV
CEO
BV
ECO
V
CE(SAT)
λ
t
R
t
F
Min.
1.5
3.0
30
5
Typ.
Max.
4.0
8.0
100
Units
mA
mA
nA
Volts
Volts
0.2
880
15
15
0.4
Volts
nm
µs
µs
SMD2420 SERIES PHOTODIODE ABSOLUTE MAXIMUM
RATINGS
Cathode-Anode voltage
Continuous device dissipation*
Operating free air range
Storage temperature
Soldering temperature
50 V
125 mW
-55° to +125°C (-67° to +257°F)
-65° to +150°C (-85° to +302°F)
260°C (500°F), 5 seconds max.
*Derate 1.43 mW/°C above 25°C ambient.
SMD2420 SERIES PHOTODIODE ELECTRICAL CHARACTERISTICS
Parameter
Light current
Dark current
Reverse breakdown voltage
Peak response wavelength
Rise time
Fall time
*From 880 nm source
Test Conditions
V
R
= 20 V, H = 1 mW/cm *
V
R
= 20 v, h = 0
I
R
= 10 µA, H = 0
V
R
= 20 V, R
L
100
Ω,
I
L
= 10 µA
2
Sym.
I
L
I
D
BV
R
λ
t
R
t
F
Min.
6
Typ.
Max.
5
Units
µA
nA
Volts
nm
ns
ns
50
880
20
20
4
Honeywell
•
Sensing and Control
For application help: call 1-800-537-6945
Infrared Components
Ceramic Discrete Surface Mount
SME/SMD Series
TYPICAL SMD2440 AND SMD2420 SERIES PERFORMANCE CHARACTERISTICS (when solder
mounted to PC board)
SMD2440 and SMD2420 Spectral Responsivity
100%
SMD2440 and SMD2420 Responsivity vs Angular
Displacement
100%
80%
Relative Response
60%
Relative Irradiance
500
600
700
800
900 1000 1100 1200
80%
60%
40%
40%
20%
0%
400
20%
0%
-40
-30
-20
-10
0
10
20
30
40
Wavelength - nm
SMD2440 Dark Current vs Temperature
100000
10000
Angular Displacement - Degrees
SMD2420 Dark Current vs Temperature
100
Dark Current - nA
100
10
1
0.1
0.01
0.001
-40
-20
0
20
40
60
80
100
120 140
Dark Current - nA
1000
VCE = 15 V
H=0V
10
1.0
0.1
0.01
0.001
-55
-10
35
80
125
Temperature - C
Temperature - C
SMD2440 Collector Current vs Ambient
Temperature
Normalized Collector Current
1.6
1.4
SMD2440 Non-saturated Switching Time vs Load
Resistance
100
1.2
Response Time - uS
10
1.0
0.8
0.6
0
20
40
60
80
1
10
100
1000
10000
Ambient Temperature - C
Load Resistance - Ohms
For application help: call 1-800-537-6945
Honeywell
•
Sensing and Control
5
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