Data Sheet
June 2001
Wideband Photodiode Receivers
Features
s
s
s
s
s
Wide-band analog signal reception
Single-mode fiber pigtail
High optical return loss
Up to 20 GHz bandwidth
1310 nm and 1550 nm sensitivity
Applications
s
s
s
s
Antenna remoting
Cellular and PCS networks
Military triband communications
TT and C
Description
The family of wideband photodiode receivers are ide-
ally suited for use in analog fiber-optic communica-
tions. With their wide bandwidth and flat response,
these devices are used in a wide array of applica-
tions, including antenna remoting, timing and refer-
ence signal distribution, measurement, delay lines,
and two-way communications.
Several packaging styles are available for these
wideband photodiodes. The most basic package, the
photodiode module, contains the photodiode chip,
optical fiber pigtail, and impedance-matched electri-
cal connections in a hermetically sealed unit. Of par-
ticular note is the high optical return loss, which
enables high-quality noise performance for sensitive
optical links.
Wideband Photodiode Receivers
Data Sheet
June 2001
for integration with Agere Systems Inc.’s System 10000
rack-mountable chassis and power supplies. Electron-
ics within flange-mount and plug-in receivers provide a
reverse bias for the photodiodes and monitor the dc
level of the optical input power, thus providing a fully
integrated wideband product.
Description
(continued)
In most cases, the basic photodiode module is inte-
grated into a complete receiver, packaged either as a
flange-mount for extreme environments, or as a plug-in
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
Operating Temperature Range:
Modules and Flange-mount
Plug-ins
Storage Temperature Range:
Modules and Flange-mount
Plug-ins
Input Power:
2510A/B, 2515A.B, 1516A/B/C
2518A/B
Maximum Power for 60 s:
2510A/B, 2515A.B, 1516A/B/C
2518A/B
dc Current:
2510A/B, 2515A/B, 1516A/B/C
2518A/B
Symbol
T
OP
–40
0
Tstg
–40
–20
P
IN
2.0 (typ)
15
P
MAX
—
—
Idc
—
—
2
12
mA
mA
4
16
mW
mW
2.5
16
mW
mW
85
65
°C
°C
70
50
°C
°C
Min
Max
Unit
Characteristics
Table 1. Optical Characteristics
Package Type
Module
Flange-Mount Receiver
Plug-in Receiver, for 19 in. rack system
Parameters
dc Photodiode Responsivity
at 1310 nm, 25 °C
RF Receiver Efficiency (typ)
at 1 GHz
2
Optical Return Loss
3
Pigtail Fiber Type (where applicable)
>0.75 A/W
>0.38
2510A/B
1
4510A/B
1
10450A/B
1
Device Code
2515A/B
1
4515A/B
1
10455A/B
1
2516A/B/C
1
4516A/B/C
1
10456A/B/C
1
2518A/B
4518A/B
10458A/B
Specifications
>0.75 A/W
>0.38
>45 dB
>1 m, 9
µm/125 µm
single-mode
SMF-28
4
or equivalent
>0.65 A/W
>0.33
>0.70 A/W
>0.35
1. Specified for <2 mW optical power, <50% modulation depth.
2. The photodiode RF current splits evenly between the internal matching resistor and the external load. (See Agere Systems’
System
Designer’s Guide to RF and Wideband Fiber Optics.)
3. Optical return loss specified for FC-APC connectors or fusion splices only. Other connection methods can degrade optical return loss.
4.
SMF-28
is a trademark of Corning Incorporated.
2
Agere Systems Inc.
Data Sheet
June 2001
Wideband Photodiode Receivers
Characteristics
(continued)
Table 2. RF Characteristics
Package Type
Module
Flange-Mount Receiver
Plug-in Receiver (for 19 in.
rack system)
Parameters
Maximum Frequency:
A Version
B Version
C Version
Minimum Frequency
Output Coupling
Amplitude Flatness
1
Output VSWR, Max
2.0:1
2.5:1
Output Impedance
RF Connector for Module
RF Connector for Flange-
Mount and Plug-in
SMA (F)
SMA (F)
3 GHz
6 GHz
—
0.1 GHz
dc
±2.0 dB
0.1—6 GHz
—
2510A/B
4510A/B
10450A/B
Device Code
2515A/B
4515A/B
10455A/B
2516A/B/C
4516A/B/C
10456A/B/C
2518A/B
4518A/B
10458A/B
Specifications
10 GHz
12 GHz
—
0.1 GHz
ac
±2.0 dB
0.1 GHz—10 GHz
10 GHz—12 GHz
20 GHz
18 GHz
15 GHZ
1 GHz
ac
±2.0 dB
1 GHz —18 GHz
18 GHz— 20 GHz
15 GHz
10 GHz
—
0.5 GHz
ac
±2.0 dB
0.5 GHz—15 GHz
—
50
Ω
K-connector
2
SMA (F)
K-connector
2
1. Relative to value at 1 GHz.
2.
K-connector
is a trademark of Anritsu Company. It is a high-speed and SMA-compatible connector.
Table 3. dc Power for Flange-mount and Plug-ins (45xx and 104xx Receivers)
Parameter
dc Power for Flange-mount and Plug-ins
(Models 45xx and 104xx)
1
: Pin 1
Symbol
Pdc
Min
—
Typ
15 nominal
at 0.2 A max
Max
—
Unit
V
1. For photodiode module CDC requirements, contact an Agere Systems’ account manager for OEM data sheet.
Agere Systems Inc.
3
Wideband Photodiode Receivers
Data Sheet
June 2001
2510A/B, 2515A/B Wideband Photodiode Receivers
Outline Diagram
Dimensions are in inches and (millimeters).
0.49
(12) 0.66
(17)
RF
OUTPUT
FIBER PIGTAIL
1.33 (34)
A
C
E
H
0.42
(11)
0.23
(6)
1-1192 (F)
B
D
F
7-PIN MINIATURE
RECTANGULAR
Pin Information
Table 4. Seven-pin Connector
Pin No.
A
B
C
D
E
F
H
Description
NC
NC
NC
NC
Bias
Ground
NC
H
F
E
D
C
B
A
PIN PHOTODIODE
RF
OUT
50
Ω
1-1194 (F)
Figure 1. 2510A/B Electrical Schematic
H
F
E
D
C
B
A
130 pF 25
Ω
RF
OUT
50
Ω
PIN
PHOTODIODE
1-1194 (F)
Figure 2. 2515A/B Electrical Schematic
4
Agere Systems Inc.
Data Sheet
June 2001
Wideband Photodiode Receivers
2516A/B, 2518A/B Wideband Photodiode Receivers
Outline Diagram
Dimensions are in inches and (millimeters).
1.24 (32)
1.04 (26)
0.84 (21)
0.26
(6.7)
0.39
(10)
0.10 (2.5)
0.20 (5)
0.58
(15)
0.78
(20)
Ø.094 (2.4)
0.10
(2.5)
0.20
(5)
0.15
(4)
K-CONNECTOR
0.41
(10)
PIN 1
0.04
(1)
0.174
(4.4)
1-1193 (F)
Pin Information
Table 5. Six-pin Connector
Pin No.
1
2
3
4
5
6
Description
NC
NC
NC
Bias
NC
Ground
V
BIAS
150
Ω
RF
OUT
50
Ω
1-1195 (F)
Figure 3. 2516A/B, 2518A/B Electrical Schematic
Agere Systems Inc.
5
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