09/2003
AMT8312
2.5 Gb/s 850 nm PIN-TIA
PRELIMINARY DATA SHEET - Rev 1.0
FEATURES
2.5 Gb/s Differential Output TIA
3.3 V Operation
1800 MHz Bandwidth
-23 dBm Typical Sensitivity
0 dBm Optical Overload
Photocurrent Monitor
100 m 850 nm PIN Photodetector
TO-46 5 Pin Lens Package
APPLICATIONS
SONET OC-48/SDH STM-16 (2.488 Gb/s)
2 x Fibre Channel (2.125 Gb/s)
2.5 Gb/s Infiniband
Fibre Channel/Gigabit Ethernet (1.0625/1.25 Gb/s)
Figure 1: Functional Block Diagram
PRODUCT DESCRIPTION
The ANADIGICS AMT8312, packaged in a 5 pin
TO-46 lens can, is a 3.3 V integrated photodetector
and transimpedance amplifier (TIA) used to convert
a short wavelength (850 nm) input optical signal into
a differential output voltage. The AMT8312 has a
bandwidth of 1.8 GHz, a dynamic range of over
23 dB and a photocurrent monitor with an output that
is proportional to the average input optical power.
These devices are readily designed into receivers,
transceivers and transponders for SONET, Fibre
Channel and Infiniband applications.
T46L
TO-46 5 pin Ball Lens
Package
Offset
Control
DC Compensation
VOUTP
VOUTN
1
4
P
IN
5
R
F
VCC
2
3
IMON
2
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
AMT8312
R
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Table 1: TO-46 Package Pin Description
Figure 2 : T46L Pin Outline (Bottom View)
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Maximum Ratings
Stresses in excess of the absolute ratings may cause permanent
damage. Functional operation is not implied under these conditions.
Exposure to absolute ratings for extended periods of time may
adversely affect reliability.
5
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
3
AMT8312
R
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+
C
Table 3: Electrical Specifications
Notes:
(1) Measured at -20 dBm optical input power with output connected into R
L
= 100
(differential)
(2) Measured at 10
-10
BER with a 2
23
-1 PRBS at 2.5 Gb/s
(3) Measured with a 2
23
-1 PRBS at 2.5 Gb/s, an input optical power of 20 dBm and R
L
= 100
(differential)
(4) Measured with a 2
23
-1 PRBS at 2.5 Gb/s, an input optical power of 3 dBm and R
L
= 100
(differential)
(5) 6
about the center eye crossing.
4
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
AMT8312
PERFORMANCE DATA
Figure 3: Eye Diagram with an Optical Input Power of 20 dBm
Figure 4: Eye Diagram with an Optical Input Power of 15 dBm
Figure 5: Eye Diagram with an Optical Input Power of 10 dBm
100 ps/Div.
50 mV/Div.
100 ps/Div.
90 mV/Div.
100 ps/Div.
90 mV/Div.
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
5
AMT8312
Figure 7: Differential Output Voltage vs. Input Power
Figure 6: Eye Diagram with an Optical Input Power of 5 dBm
0.0
100.0
200.0
300.0
400.0
500.0
600.0
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
Input Power (mWpp)
D
i
fferential O
u
tput V
o
ltage (m
V
pp)
100 ps/Div.
90 mV/Div.
6
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
AMT8312
Figure 8: T46L Package Outline Diagram
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
7
AMT8312
NOTES
WARNING
ANADIGICS products are not intended for use in life support appliances, devices or systems. Use of an ANADIGICS product in
any such application without written consent is prohibited.
IMPORTANT NOTICE
ANADIGICS, Inc.
141 Mount Bethel Road
Warren, New Jersey 07059, U.S.A.
Tel: +1 (908) 668-5000
Fax: +1 (908) 668-5132
URL: http://www.anadigics.com
E-mail: Mktg@anadigics.com
ANADIGICS, Inc. reserves the right to make changes to its products or to discontinue any product at any time without notice. The
product specifications contained in Advanced Product Information sheets and Preliminary Data Sheets are subject to change
prior to a product's formal introduction. Information in Data Sheets have been carefully checked and are assumed to be reliable;
however, ANADIGICS assumes no responsibilities for inaccuracies. ANADIGICS strongly urges customers to verify that the
information they are using is current before placing orders.
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
8
AMT8312
ORDERING INFORMATION
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