Fiber Optics
Ternary PIN Photodiode
with integrated Preamplifier IC
SRP00294x
SRP00295x
Features
• InGaAs/InP PIN photodiode with preamplifier IC
• Designed for SONET OC-48 / SDH STM-16
applications in fiber-optics communication
systems
• Sensitive receiver for 2nd and 3rd optical window
(1300 nm and 1550 nm)
• Suitable for bit rates up to 2.5 Gbit/s
• Module with high optical sensitivity
• Fast switching times
• Low dark current
• Excellent noise immunity
• High reverse current stability from planar structure
• Hermetically sealed TO46 package
Data Sheet
1
2001-12-01
SRP00294x
SRP00295x
Pin Configuration
Pin Configuration
Receiver with Preamp (bottom view)
2.54 mm
Pinning
2
1
3
4
3
Out−
4 V
CC
Pin
Pre-
amp
2
1
Out+
Figure 1
Receiver with Preamp
Data Sheet
2
2001-12-01
SRP00294x
SRP00295x
Description
Description
The Infineon optical receiver module has been designed for use in optical networks and
is suitable for bit rates up to max. 2.5 Gbit/s if used without any TIA.
The optical receiver module uses a high-speed PIN photodetector optional coupled with
a hybrid low noise transimpedance amplifier (PIN-TIA). The optical receiver photodiode
can be used for 1310 nm or 1550 nm optical communications.
The PIN photodiode is made of InGaAs/InP and has an active diameter of 75 µm. The
function of the PIN and PIN-TIA optical receiver module is to detect input optical power,
to transduce the incident radiation into current (PIN) and then to convert the current into
a voltage (PIN-TIA).
The low input noise current density of the used transimpedance amplifiers in PIN-TIA’s
provides the optical receiver module, when used with appropriate filtering, with ample
sensitivity for realizing minimum input power requirements. Designers of optical
receivers can use the module in any application that benefits from integration of the
photodiode and TIA into a TO coaxial package. Typical for such applications are
receivers for digital crossconnects, digital loop carriers, add/drop-multiplexers and
optical network units.
Last but not least the fast switching times, low dark currents and the packaging in a
compact and hermetically sealed TO46 make the optical receivers usable in many other
fiber optic receiver applications. One application is the use in a Compact realization of a
transceiver in one module like the so called BIDI
®
(Figure
2).
Beam Splitter
Glass Lens
TO-
Laser
Fiber
TO-Detector
Figure 2
Compact Realization of the Transceiver in One Module
Data Sheet
3
2001-12-01
SRP00294x
SRP00295x
Technical Data
Technical Data
Absolute Maximum Ratings
Parameter
Module
Operating temperature range at case
Storage temperature range
Soldering temperature (
t
max
= 10 s,
2 mm distance from bottom edge of case)
Receiver Diode
Reverse Voltage
Forward Current
Optical power into the optical port
Symbol
Limit Values
min.
max.
85
85
260
°C
Unit
T
C
T
stg
T
S
–40
–40
V
R
I
F
P
port
20
10
1
V
mA
mW
The electro-optical characteristics described in the following table are only valid for use
within the specified maximum ratings or under the recommended operating conditions.
Characteristics for Pin-Preamp Receivers at
T
A
= 25°C, unless otherwise specified.
Preamp Characteristics
Parameter
DC-Characteristics
Supply Voltage
Supply Current
AC-Characteristics
Optical Sensitivity
(BER
≤
10
–9
, PN23)
Linear Bandwidth (–3 dB)
Optical overload (avg.)
Symbol
min.
Limit Values
typ.
5
47
–22
1200
9
40
11
1600
0
13
50
3
G
RL
4
Unit
max.
5.5
65
V
mA
dBm
MHz
dBm
17
60
34
–27
kΩ
Ω
pa/√Hz
V/mW
dB
2001-12-01
V
CC
I
CC
S
BW
4.5
35
P
max
Transimpedance (single ended)
R
T
R
out
Output resistance
Noise current density
Gain (differential)
Return Loss,
λ
= 1310 nm
Data Sheet
21
SRP00294x
SRP00295x
Technical Data
Some Eye Diagrams
Figure 3
P
opt
= 5 µW avg.
(OC-48/STM-16)
Figure 5
P
opt
= 10 µW avg.
(OC-48/STM-16)
Figure 4
P
opt
= 100 µW avg.
(OC-48/STM-16)
Figure 6
P
opt
= 500 µW avg.
(OC-48/STM-16)
Data Sheet
5
2001-12-01
