AMT8504
1.25 Gb/s Integrated 850 nm MSM-TIA
PRELIMINARY DATA SHEET - Rev 1
TO-46L
Ball Lens
Package
TO-46F
Ultra Flat
Window
Package
PRODUCT DESCRIPTION
The ANADIGICS AMT8504 is a 3.3V monolithically
integrated Metal-Semiconductor-Metal (MSM)
photodetector and transimpedance amplifier (TIA)
used to convert an 850nm input optical signal into a
differential output voltage, and is manufactured in
ANADIGICS 6 GaAs wafer fabrication facility. The
integrated MSM and TIA receiver maximizes the
receiver performance by minimizing the
photodetector input parasitics to the TIA and
Figure 1: Equivalent Circuit
internally biasing the photodetector to achieve high
sensitivity, bandwidth and overload performance. As
an integrated product the reliability is inherently
better than a discrete solution, and both the MSM-TIA
integrated circuit and TO46 flat window and TO46
lens packaged receiver pass stringent reliability
requirements. These products are readily designed
into receivers and transceivers for Gigabit Ethernet
and Fibre Channel applications.
US Patents: 5047728, 5646573
Charge
Pump 7.5 GHz
Osc
AGC
OUT
OUT
V
DD
4
2
1
3
P
IN
07/01
FEATURES
·Differential Output TIA
·3.3V Operation
·Automatic Gain Control
·Integrated 850nm MSM detector & TIA
·100 m Detector Diameter
·TO-46 Ultra Flat Window or Lens
Hermetic Package
·High Reliability
·-5 to +80°C Operating Temperature Range
APPLICATIONS
·Gigabit Ethernet (1.250Gb/s)
·Fibre Channel (1.0625 Gb/s)
m
2
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
Table 1: Package Pin Description
Figure 2: Pin Outline (Bottom View)
NIP NOITPIRCSED TNEMMOC
1V
TUO
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2V
DD
egatloVylppuSevitisoP-stloV3.3+
3V
TUO
)detrevnI(egatloVtuptuOAIT-tupnilacitpohtiw'0'lacigoL
4dnuorGdednuorgsiesaC
3
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
V
DD
v0.6
P
NI
mBd5+
T
S
C°521otC°56-.pmeTegarotS
Table 3: Electrical Characteristics
Table 2: Absolute Maximum Ratings
ELECTRICAL CHARACTERISTICS
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retemaiDrotceteD-001- mµ
ytivisnopseRlaitnereffiDlangiSllamS
)1(
)zHM05@( 0001-- W/V
htdiwdnaB
)1(
009-- zHM
ffotuCycneuqerFwoL--003zHk
ecnatsiseRtuptuO-04- mhO
daolrevOlacitpO
)2(
0- - mBd
ytivitisneSlacitpO
)2(
02-22-- mBd
egatloVtuptuOlaitnereffiD
)3(
-0001- Vm
T
ESIR
T&
LLAF
)%08-02(
)3(
-062- sp
noitrotsiDelcyCytuD
)3(
-4 01%
)kp-kp(rettiJlatoT
)4(,)3(
-08021sp
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egnaRegatloVgnitarepO0.3+3.3+6.3+V
egnaRerutarepmeTesaCgnitarepO5--08C°
l
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.
Notes:
(1) Measured at 14 dBm optical input power with output connected into RL = 100W
(differential)
(2) Measured at 10-10 BER with a 27-1 PRBS at 1.25 GB/s
(3) Measured with a 27 -1 PRBS at 1.25Gb/s, an input optical power of -3dBm and
RL=100 W (differential)
(4) 6s about the center eye crossing.
4
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
V
OUT
V
OUT
DUT
0.1 uF
0.1uF
0.1uF
V
DD
Figure 3: DUT Test Fixture Schematic
5
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
20.0
25.0
30.0
35.0
40.0
45.0
50.0
0 20406080100
Case Temperature (C)
Supply Current (mA)
3.0V
3.3V
3.6V
1000
1200
1400
1600
1800
2000
020406080100
Case Temperature (C)
Bandwidth (MHz)
3.0V
3.3V
3.6V
1000
1200
1400
1600
1800
2000
0 20406080100
Case Temperature (C)
Differential Responsivity (V/W)
3.0V
3.3V
3.6V
-25.00
-24.00
-23.00
-22.00
-21.00
-20.00
0 20406080100
Case Temperature (C)
Sens itivity (dBm)
3.0V
3.3V
3.6V
Figure 4: Eye Diagram with an Optical Input Power
of -17dBm
Figure 5: Eye Diagram with an Optical Input Power
of 0dBm
Figure 6: Supply Current vs. Temperature Figure 7: Bandwidth vs. Temperature
Figure 8: Differential Responsivity vs. Temperature Figure 9: Sensitivity vs. Temperature
PERFORMANCE DATA
6
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
Lightwave
Analyzer
HP 8702D
Laser Optical Attenuator DUT Test
Fixture
Power
Supply
Extinction
Ratio= 3dB
Figure 10: Test Setup for Frequency Response
Figure 11: Test Setup for Sensitivity
Laser Optical
Attenuator DUT Test
Fixture
Power
Supply
Pulse Pattern
Generator Limiting
Amplifier
Error
Detector Hybrid
Coupler
Extinction
Ratio = 9dB
BERT
25 dB Gain
Pulse Pattern
Generator
Laser Optical
Attenuator DUT Test
Fixture
Power
Supply
Digital
Communication
Analyzer HP83480A
Extinction
Ratio = 9dB
Figure 12: Test Setup for Eye Measurements
MEASUREMENT METHODS
7
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
Figure 13: Application Schematic
CF is an optional single pole noise capacitor
fc is the desired cutoff frequency
R = 50 W
RO is required with high input resistance limiting amplifiers
RO = 100 W
f
c
R
C
F
π
=21
LIMITING
AMPLIFIER
Charge
Pump
AGC
OUT
OUT
V
DD
4
2
1
3
0.1uF
0.1uF
C
F
R
O
0.1uF
7.5 GHz
OSC
APPLICATION INFORMATION
8
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
Charge
Pump
AGC
OUT
OUT
V
DD
4
2
1
3
0.1uF
0.1uF
0.1uF
V
OUT
V
OUT
7.5 GHz
OSC
Figure 14: Evaluation Board Schematic
Figure 15: Evaluation Board Layout
9
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
Figure 16: T46F Package Outline Diagram
PACKAGE OUTLINE
10
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
Figure 17: T46L Package Outline Diagram
11
AMT8504
PRELIMINARY DATA SHEET - Rev 1
07-01
NOTES
12
PRELIMINARY DATA SHEET - Rev 1
07-01
IMPORTANT NOTICE
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.
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.
ANADIGICS, Inc.
141 Mount Bethel Road
Warren, New Jersey 07059, U.S.A
Tel: +1 (908) 668-5000
Fax: +1 (908) 668-5132
http://www.anadigics.com
Mktg@anadigics.com
AMT8504
ORDERING INFORMATION
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