PIN Photodiode
FEATURES
• Data rates up to 2.5 Gb/s
• High Quantum Efficiency: 0.8A/W at 1,310nm
• Low dark current: 0.1nA
• Photosensitive area: 50µm diameter
• Wide spectral response range: 900nm to 1,600nm
FID3Z2KX/LX
KX
APPLICATIONS
• Optical transmission system: STM-1 (OC-3),
STM-4 (OC-12) or STM-16 (OC-48) short haul.
DESCRIPTION
The FID3Z2KX/LX is a PIN photodiode with a multimode
fiber pigtail designed for use in local area network, subscriber loop
and high bit-rate tranmission system applications up to 2.5 Gb/s at
both 1,310nm and 1,550nm wavelength. The PIN chip has a
photosensitivity area diameter of 50µm with a planar structure and
guardring for high reliability. A multimode fiber is aligned to the
hermetically sealed PIN diode. The optical alignment system has
the high coupling stability.
LX
Edition 1.1
July 2004
1
FID3Z2KX/LX
ABSOLUTE MAXIMUM RATINGS (Ta=25°C, Unless otherwise specified)
Parameter
Storage Temperature
Operating Case Temperature
PIN Reverse Voltage
PIN Forward Current
PIN Reverse Current
Symbol
Tstg
Top
VR
IF
IR
Limits
Min.
-40
-40
0
-
-
PIN Photodiode
Max.
+90
+85
20
5
2.0
Unit
°C
°C
V
mA
mA
OPTICAL & ELECTRICAL CHARACTERISTICS
(Ta=-40°C to +85°C,
λ=1,300
and 1,500nm, Unless otherwise specified)
Parameter
PIN Responsivity
Variation of Responsitivity
Symbol
R
∆R
Conditions
VR=1V, 1,300nm
1,500nm
VR=1V, -20 to +70°C
-40 to +85°C
VR=5V,
Ta=25°C
Ta=70°C
Ta=85°C
VR=5V, RL=50Ω,
-3dB from 500kHz
f=1MHz, VR=5V,
Min.
0.80
0.85
-
-
-
-
-
1.5
-
30
Limits
Typ. Max.
0.89
-
0.93
-
-
0.1
-
-
2.0
0.9
-
-
±3
±4
2
10
20
-
1.3
-
Unit
A/W
%
Dark Current
ID
nA
Cut-off Frequency
Capacitance
Optical Return Loss
fc
Ct
ORL
GHz
pF
dB
Note 1: Optical characteristics are specified on the condition that
single-mode fiber is used for the optical source for the testing.
2
PIN Photodiode
Fig. 1 Spectral Response (η vs.
λ)
100
Ta = 25°C
VR = 1V
Quantum Efficiency,
η
(%)
80
Responsivity, R(A/W)
0.5
1.0
FID3Z2KXLX
Fig. 2 Spectral Response (R vs.λ)
Ta = 25°C
VR = 1V
60
40
20
0.1
0
600
800
1000
1200
1400
1600
1800
600
800
1000
1200
1400
1600
1800
Wavelength,
λ
(nm)
Fig. 3 Temperature Dependence of Responsivity
10-8
Normalized Responsivity,
∆R/R
(25°C) (%)
λ
= 1,310nm
VR = 1V
4
10-9
Wavelength,
λ
(nm)
Fig. 4 Dark Current vs. Reverse Voltage
Ta = 85°C
Dark Current, ID (A)
2
Ta = 25°C
10-10
0
-2
10-11
Ta = -40°C
10-12
-4
-6
-40
-20
0
20
40
60
80
10-13
0
10
Reverse Voltage, VR (V)
20
Temperature, Ta (°C)
3
FID3Z2KX/LX
Fig. 5 Dark Current vs. Temperature
10-8
10-9
Response (dB)
0
-3
-6
-9
10-12
-12
2
10-13
-40 -20
0
20
40 60 80
10
10-10
10-11
VR=5V
PIN Photodiode
Fig. 6 Frequency Response
Dark Current, ID (A)
Ta = 25°C
VR=5V
RL = 50Ω
λ =
1,310nm
102
Frequency (MHz)
103
Temperature, Ta (°C)
Fig. 7 Capacitance vs. Reverse Voltage
10
Ta=25°C
f=1 MHz
Capacitance, Ct (pF)
1
0.1
0.2
0.5 1
5 10
50
Reverse Voltage, VR (V)
4
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