ROHM RLD78MRA1

RLD78MRA1
Laser Diodes
780nm Low Power Lasers
RLD78MRA1
A long-run product with market-proved high reliability. Matching to various needs.
zApplications
CD-ROM
CD player
etc.
zDimensions (Unit : mm)
Equivalent circuit diagram
5.0
(3)
0.22
0.82 1.5
0.62
zFeatures
1) Optical power output : CW 4.5mW
2) Low noise
3) High precision φ5.6 metal stem
φ5.6
0.4
0.4
4.9
2
1
1.6 1.5
0.7
3.2
PD
LD
Optical distance
1.35±0.1
(1) (2)
3-0.4
(2)
5
3-0.55max
(3) (1)
1.6 1.6
zAbsolute maximum ratings (Tc=25°C)
Parameter
Symbol
Limits
Unit
PO
4.5
mW
VR
2
V
VR(PIN)
30
V
Operating temperature
Topr
−10 to +70
°C
Storage temperature
Tstg
−40 to +85
°C
Output
Reverse voltage
Laser
Photodiode
zElectrical and optical characteristics (Tc=25°C)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Threshold curret
Ith
−
35
60
mA
Operating current
Iop
−
45
70
mA
PO=3mW
Operating voltage
Vop
−
1.9
2.3
V
PO=3mW
η
0.1
0.25
0.6
Monitor current
Im
0.05
0.15
0.48
mA
Parallel diveragence angle
θ //
8
11
15
deg
Perpendicular divergence angle
θ⊥
20
37
45
deg
Parallel deviation angle
∆θ //
−3
0
3
deg
Perpendicular deviation angle
∆θ ⊥
−3.6
0
3.6
deg
Differential efficiency
Emission point accuracy
Peak emission wavelength
Signal-to-Noise ratio
Conditions
−
mW/mA 2mW/ (I (3mW)− I (1mW))
PO=3mW, VR(PIN)=15V
PO=3mW
0
100
µm
λ
770
785
810
nm
PO=3mW
S/N
60
−
−
dB
f=720kHz, ∆f=10kHz, PO=3mW
∆X,∆Y,∆Z −100
−
1/2
RLD78MRA1
Laser Diodes
zElectrical and optical characteristics curves
−10°C
0°C
25°C
40°C
60°C
70°C
4
3
2
1
0
10
20
30
40
50
60
70
80
OPERATING CURRENT : IF (mA)
Fig.1 Optical output vs. operating current
5
TC=25°C
PO=3mW
OPTICAL INTENSITY : PO (mW)
1.0
RELATIVE OPTICAL INTENSITY
OPTICAL POWER : PO (mW)
5
θ
θ
0.5
0
−40
4
3
2
1
0
0
ANGLE (deg)
Fig.2 Far field pattern
40
0.1
0.2
0.3
0.4
MONITOR CURRENT : Im (mA)
Fig.3 Monitor current vs. optical output
2/2
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
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Copyright © 2008 ROHM CO.,LTD.
THE AMERICAS / EUROPE / ASIA / JAPAN
Contact us : [email protected] rohm.co. jp
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FAX : +81-75-315-0172
Appendix1-Rev2.0