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 µAV5070 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
SSensitivity, λ = 1310 nm A/W 0.8 0.94
λ = 1550 nm 0.81 0.96
MMultiplication Factor, λ = 1310 nm, IPO = 1.0 µA3040
VR = V (@ID = 1 µA)
xExcess Noise Factor2, λ = 1310 nm, 1550 nm, 0.7
IPO =1.0 µA, M = 10, f = 35 MHz, B = 1 MHz
FExcess 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
V
BR
(25°C+∆T°C)-V
BR
(25°C)
∆T°C • V
BR
(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 °C260 (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
00.9 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
I
D
lph
λ = 1310 nm
I
PO
= 1.0 µA
T
C
= 25°C
Reverse Voltage, VR (V)
10
-6
10
-7
10
-8
10
-9
10
-10
020406080100
T
C
= 85°C
T
C
= 65°C
T
C
= 25°CT
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
020406080100
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
R
L
= 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 12 5102050100
0.5
0.4
1310 nm ( ), 1550 nm ( )
f = 35 MHz, B = 1 MHz
100
50
20
10
5
2
1100502010521
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)
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 Flat mount Flange SMF With FC-UPC Connector
NR8500FP-CC With SC-UPC Connector
NR8500FR-BB GI-50 Fiber With FC-SPC Connector
NR8500FR-CB With SC-SPC Connector
NR8500CP-BC Vertical Mount SMF With FC-UPC Connector
NR8500CP-CC Flange With SC-UPC Connector
NR8500CR-BB GI-50 Fiber With FC-SPC Connector
NR8500CR-CB 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
23
12.0±0.15
7.0±0.2
14.0±1.0
231
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 µm9.5±1–
Core Diameter µm–50±3
Cladding Diameter µm125±2125±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
