NR8500 Series
FEATURES
•SMALL DARK CURRENT:
ID = 7 nA
•HIGH SENSITIVITY:
S = 0.94 A/W at λ = 1310 nm, M = 1
S = 0.96 A/W at λ = 1550 nm, M = 1
•HIGH SPEED RESPONSE:
fC = 1.5 GHz at M = 10
•COAXIAL MODULE WITH SMF or GI-50 FIBER
•WITH SC CONNECTOR: Standard
FC CONNECTOR: Option
NEC's NR8500 series is an InGaAs avalanche photo diode
(APD) coaxial module with optical fiber pigtail. This module is
designed for long wavelength optical communication systems
and is ideal as a reciever for Synchronous Digital Hierarchy
(SDH) system, STM-4 and STM-1, ITU-T recommendations.
DESCRIPTION
PART NUMBER NR8500 Series
SYMBOLS PARAMETERS AND CONDITIONS UNITS MIN TYP MAX
VBR Reverse Breakdown Voltage, ID =100 µA V 50 70 90
δ1
Temperature Coefficient of Reverse Breakdown Voltage
%/ºC 0.2
IDDark Current, VR = VBR x 0.9 nA 7 30
IDM Multiplied Dark Current, M = 2 to 10 nA 1 5
CtTerminal Capacitance, VR = V(BR)R x 0.9, f = 1 MHz pF 0.5 0.75
fCCut-off Frequency, M = 10 GHz 1.0 1.5
M = 20 1.2
S Sensitivity, λ = 1310 nm A/W 0.8 0.94
λ = 1550 nm 0.81 0.96
M Multiplication Factor, λ = 1310 nm, IPO = 1.0 µA3040
VR = V (@ID = 1 µA)
x Excess Noise Factor2, λ = 1310 nm, 1550 nm, 0.7
IPO =1.0 µA, M = 10, f = 35 MHz, B = 1 MHz
F Excess Noise Factor2, λ = 1310 nm, 1550 nm, 5
IPO =1.0 µA, M = 10, f = 35 MHz, B = 1 MHz
ORL Optical Return Loss SMF dB 30
GI-50 Fiber 28
Note:
2. F = MX
ELECTRO-OPTICAL CHARACTERISTICS (TC = 25°C, Unless otherwise specified)
California Eastern Laboratories
VBR (25°C+∆T°C)-VBR (25°C)
∆T°C • VBR (25°C)
1. δ =
NEC's φ φ
φ φ
φ50 µ µ
µ µ
µm
InGaAs APD IN COAXIAL PACKAGE
FOR 155 Mb/s AND 622 Mb/s APPLICATIONS
Dark Current, I
D
(A)
DARK CURRENT vs.
REVERSE VOLTAGE
ABSOLUTE MAXIMUM RATINGS1
(TC = 25°C, unless otherwise specified)
SYMBOLS PARAMETERS UNITS RATINGS
IFForward Current mA 10
IRReverse Current mA 1.0
TCOperating Case Temp. °C -40 to +85
TSTG Storage Temperature °C -40 to +85
TSLD Lead Soldering Temperature °C 260 (10 sec.)
RH Relative Humidity % 85
(noncondensing)
WAVELENGTH DEPENDENCE OF
QUANTUM EFFICIENCY
Sensitivity (Relative Value), ∆S/S (%)
Operating Case Temperature, TC (°C)
Reverse Voltage, VR (V)
Dark Current, Photo Current, I
D
, lph (A)
DARK CURRENT AND PHOTO
CURRENT VS. REVERSE VOLTAGE
Quantum Efficiency, η (%)
Wavelength, λ (µm)
TYPICAL PERFORMANCE CURVES (TC = 25°C, unless otherwise specified)
TEMPERATURE DEPENDENCE OF
SENSITIVITY
Note:
1. Operation in excess of any one of these parameters may result
in permanent damage.
NR8500 Series
100
80
60
40
20
0
0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7
λ = 1310 nm
-60 -40 -20 0 20 40 60 80 100
-10
0
10
10
-4
10
-5
10
-6
10
-7
10
-8
10
-9
10
-10
020 806040 100
ID
lph
λ = 1310 nm
IPO = 1.0 µA
TC = 25°C
Reverse Voltage, VR (V)
10
-6
10
-7
10
-8
10
-9
10
-10
0 20406080100
T
C
= 85°C
T
C
= 65°C
T
C
= 25°C
T
C
= -20°C
NR8500 Series
MULTIPLICATION FACTOR vs.
REVERSE VOLTAGE
Multiplication Factor, M
Reverse Voltage, VR (V)
10
3
TC = 85°C
TC = 25°C
TC = 65°C
TC = -20°C
10
2
10
1
10
0
0 20406080100
TEMPERATURE DEPENDENCE OF
DARK CURRENT and MULTIPLIED
DARK CURRENT
Dark Current, Multiplied Dark Current I
D
,
I
DM
(A)
Frequency, f (GHz)
λ = 1310 nm
ID @ V
R
= 0.9 V
(BR)R
I
DM
10-6
10-7
10-8
10-9
10-10
10-11
-60 -40 -20 0 20 40 60 80 100
TYPICAL PERFORMANCE CURVES (TC = 25°C, unless otherwise specified)
λ = 1310 nm
RL = 50Ω
M = 8
0 1.0 2.0 3.0 4.0 5.0
110100
10
1
0.1
2
1
0.5
0.2
0.1
1 2 5 10 20 50 100
0.5
0.4
1310 nm ( ), 1550 nm ( )
f = 35 MHz, B = 1 MHz
100
50
20
10
5
2
1
100502010521
FREQUENCY RESPONSE
Response, (3 dB/div.)
CUT-OFF FREQUENCY vs.
MULTIPLICATION FACTOR
Cut-off Frequency, f
C
(GHz)
TERMINAL CAPACITANCE vs.
REVERSE VOLTAGE
Terminal Capacitance, C
t
(pF)
EXCESS NOISE FACTOR vs.
MULTIPLICATION FACTOR
Excess Noise Factor, F
Multiplication Factor, M
Multiplication Factor, M
Reverse Voltage, VR (V)
Operating Case Temperature, TC (ºC)
3-180
NR8500 Series
OUTLINE DIMENSIONS (Units in mm)
35±2 mm
Fiber Length: 1000 mm MIN
Connector
8.99±0.5 mm
5±2 mm
12.7±0.2
17.0±0.2
ø2.2
ø0.9
ø3.2±0.2
ø7.0±0.2
ø5.0±0.2
1.2±0.2
4.0±0.2
10.5±1.0
14.0±1.0
3.7±0.3
1.0±0.1
P.C.D. = ø2.0
7.2±0.3
24.7±1.0
4.0±0.5
3.2
3
21
1
3
2
ø0.45±0.05
2.2
3.5±0.5
Optical Fiber
Length: 1 m MIN
FP/FR CP/CR
PART NUMBER FLANGE TYPE FIBER TYPE AVAILABLE CONNECTOR
NR8500FP-BC-AZ* Flat mount Flange SMF With FC-UPC Connector
NR8500FP-CC-AZ* With SC-UPC Connector
NR8500FR-BB-AZ* GI-50 Fiber With FC-SPC Connector
NR8500FR-CB-AZ* With SC-SPC Connector
NR8500CP-BC-AZ* Vertical Mount SMF With FC-UPC Connector
NR8500CP-CC-AZ* Flange With SC-UPC Connector
NR8500CR-BB-AZ* GI-50 Fiber With FC-SPC Connector
NR8500CR-CB-AZ* With SC-SPC Connector
A Business Partner of NEC Com
p
ound Semiconductor Devices, Ltd
.
02/27/2003
Life Support Applications
These NEC products are not intended for use in life support devices, appliances, or systems where the malfunction of these products can reasonably be expected
to result in personal injury. The customers of CEL using or selling these products for use in such applications do so at their own risk and agree to fully indemnify
CEL for all damages resulting from such improper use or sale.
ORDERING INFORMATION
16.0±0.2
0.5
ø0.45±0.05
ø0.9
Optical Fiber
Length: 1 m MIN
ø7.0±0.2
8.0±0.3
0.5±0.2
6.0
15.0
25.3±1.0
4.3
P.C.D. = ø2.0
4–R1.25±0.2
2–ø2.5 8.5±0.2
1
2
3
12.0±0.15
7.0±0.2
14.0±1.0
2
3
1
1. Anode (Negative)
2. Cathode (Positive)
3. Case
1. Anode (Negative)
2. Cathode (Positive)
3. Case
OPTICAL FIBER CHARACTERISTICS
PARAMETER UNITS SPECIFICATION
SMF GI-50
Mode Field Diameter µm 9.5±1–
Core Diameter µm– 50±3
Cladding Diameter µm 125±2 125±2
Maximum Cladding Noncircularity % 2 2
Maximum Core/Cladding Concentricity % 1.6 4.0
Outer Diameter mm 0.9±0.1 0.9±0.1
Cut-off Wavelength nm 1100 to 1270 –
Minimum Fiber Bending Radius mm 30 30
Fiber Length mm 1000 MIN 1000 MIN
Flammability UL1581 VW-1
*NOTE:
Please refer to the last page of this data sheet, “Compliance with EU Directives” for Pb-Free RoHS Compliance Infomation.
3-181
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Santa Clara, CA 95054-1817
Telephone: (408) 919-2500
Facsimile:
(
408
)
988-0279
Subject: Compliance with EU Directives
CEL certifies, to its knowledge, that semiconductor and laser products detailed below are compliant
with the requirements of European Union (EU) Directive 2002/95/EC Restriction on Use of Hazardous
Substances in electrical and electronic equipment (RoHS) and the requirements of EU Directive
2003/11/EC Restriction on Penta and Octa BDE.
CEL Pb-free products have the same base part number with a suffix added. The suffix –A indicates
that the device is Pb-free. The –AZ suffix is used to designate devices containing Pb which are
exempted from the requirement of RoHS directive (*). In all cases the devices have Pb-free terminals.
All devices with these suffixes meet the requirements of the RoHS directive.
This status is based on CEL’s understanding of the EU Directives and knowledge of the materials that
go into its products as of the date of disclosure of this information.
Restricted Substance
per RoHS
Concentration Limit per RoHS
(values are not yet fixed)
Concentration contained
in CEL devices
-A -AZ
Lead (Pb) < 1000 PPM Not Detected (*)
Mercury < 1000 PPM Not Detected
Cadmium < 100 PPM Not Detected
Hexavalent Chromium < 1000 PPM Not Detected
PBB < 1000 PPM Not Detected
PBDE < 1000 PPM Not Detected
If you should have any additional questions regarding our devices and compliance to environmental
standards, please do not hesitate to contact your local representative.
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