PRODUCT INFORMATION
1A255
Baseband Video
860nm
High-Performance LED
The low thermal droop of this device
allows baseband video transmission
with minimum distortion. The dou-
ble-lens optical system provides for
optimum coupling of power into the
fiber.
Optical and Electrical Characteristics (25° C Case Temperature)
PARAMETER
SYMBOL MIN. TYP. MAX. UNIT
TEST CONDITION
Fiber-Coupled Power
P
80
120
6
W
ns
IF=80 mA
fiber
(Fig.1,2,&3) (Table1)
(Note 1)
Fiber:
62.5/125m
Graded
Rise and Fall Time
t ,t
8
IF=80 mA
r f
(10-90%)
(no bias)
Bandwidth
f
55
MHz
IF=80 mA
c
Index
(3dB
)
el
NA=0.275
Thermal Droop
(nonlinearity) (Note 2)
l⌬Pl
2
%
nm
nm
V
IF=80 mA
IF=80 mA
IF=80 mA
IF=80 mA
VR=1V
Peak Wavelength
Spectral Width (FWHM)
Forward Voltage (Fig.5)
Reverse Current
840 860 880
p
⌬
50
VF
IR
C
1.8 2.2
20
A
pF
Capacitance
250
VR= 0V, f=1 MHz
Note 1: Measured at the exit of 100 meters of fiber.
Note 2: Transient decline in optical power due to self-heating.
Ø4.7
Ø1.5
0.6
Absolute Maximum Ratings
PARAMETER
3.7
SYMBOL
LIMIT
Storage Temperature
T
-55 to +125ЊC
stg
14
Operating Temperature (derating: Fig.4)
Electrical Power Dissipation (derating: Fig.4)
Continuous Forward Current (fр10 kHz)
Peak Forward Current (duty cycleр50%, fу1 MHz)
Reverse Voltage
T
-55 to +125ЊC
250 mW
110 mA
180 mA
1.5 V
op
P
0.4
tot
CASE
IF
IFRM
VR
ANODE
CATHODE
2.5
5.4
BOTTOM VIEW
Soldering Temperature (2mm from the case for 10 sec)
T
260ЊC
sld
The anode is in electrical contact with the case.
TO-46 Package With Lens
Thermal Characteristics
PARAMETER
SYMBOL MIN.
TYP.
MAX.
UNIT
Thermal Resistance -Infinite Heat Sink
R
100
ЊC/W
thjc
Thermal Resistance -No Heat Sink
R
400
ЊC/W
%/ЊC
thja
Temperature Coefficient -Optical Power dP/dT
-0.5
0.3
j
Temperature Coefficient -Wavelength
d/dT
nm/ЊC
j
12090.11 1994-09-20
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