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AMT8302
2.125 Gb/s Integrated 850nm MSM-TIA
PRELIMINARY DATA SHEET - Rev 1.2
FEATURES
* * * * * * Differential Output TIA 3.3 V Operation Automatic Gain Control Integrated 850nm MSM Detector & TIA TO-56 Ultra Flat-Window Hermetic Package High Reliability
APPLICATIONS
* 2x Fibre Channel (2.125 Gb/s)
T56F TO-56 Ultra Flat Window Package
PRODUCT DESCRIPTION
The ANADIGICS AMT8302 is a 3.3 V 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
VDD
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 TO56 flat window packaged receiver pass stringent reliability requirements. These products are readily designed into receivers and transceivers for 2X Fibre Channel applications.
1
OUT
4 2
OUT AGC
US Patents: 5047728, 5646573
PIN
Charge Pump
7.5 GHz Osc
3
Figure 1: AMT8302 Equivalent Circuit
06/2002
AMT8302
#3
#4 #2
#1
Figure 2: T56 Pinout (Bottom View)
Table 1: Pin Description PIN 1 2 3 4 DESCRIPTION VDD - Positive Supply Voltage VOUT - TIA Output Voltage (Inverted) Ground VOUT - TIA Output Voltage (Non-Inverted) COMMENT +3.3 Volts Logical '0' with optical input Case is grounded Logical '1' with optical input
2
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
AMT8302
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Minimum and Maximum Ratings PARAMETER Supply Voltage (VDD) Optical Input Power (PIN) Storage Temperature (TSTG) MIN -65 MAX +6.0 +5 +125 UNIT V dB m C
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.
Table 3: Electrical Specifications PARAMETER Wavelength ( ) Detector Diameter Small Signal Differential Responsivity (@ 50 MHz) Bandwidth(1) Low Frequency Cutoff Output Resistance Optical Overload
(2) (1)
MIN 770 1000 1400 0 -19
(3)
TYP 850 100 1900 40 750 140 5 50 35 +3.3 -
MAX 860 300 55 +3.6 80
UNIT nm m V/W MHz kHz dB m dB m mV ps % ps mA V C
Optical Sensitivity (2) Differential Output Voltage TRISE and TFALL (20-80%) (3) Duty Cycle Distortion (3) Total Jitter (3), (4) Supply Current Operating Voltage Range Operating Case Temperature Range
+ 3.0 0
Notes: (1) Measured at -14 dBm optical input power with output connected into RL = 100 (differential) (2) Measured at 10-10 BER with a 27-1 PRBS at 2.125 Gb/s (3) Measured with a 27-1 PRBS at 2.125 Gb/s, an input optical power of -3 dBm and RL = 100 (differential) (4) 6 about the center eye crossing PRELIMINARY DATA SHEET - Rev 1.2 06/2002
3
AMT8302
PERFORMANCE DATA
Figure 3: Eye Diagram with an Optical Input Power of -18 dBm
10 mV/Div
100 ps/Div
Figure 4: Eye Diagram with an Optical Input Power of -8.0 dBm
60 mV/Div
100 ps/Div
Figure 5: Eye Diagram with an Optical Input Power of 0 dBm
150 mV/Div
4
100 ps/Div
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
AMT8302
Figure 6: Supply Current vs.Temperature
50.0
Figure 7: Bandwidth vs. Temperature
2400 2200
45.0
2000
Supply Current (mA) 40.0
Bandwidth (MHz)
1800
1600
35.0
1400
30.0
3V 3.3V 3.6V
3V
1200
3.3V 3.6V
25.0 0 10 20 30 40 50 60 70 80 90 Case Temperature (C)
1000 0 10 20 30 40 50 60 70 80 90
Case Temperature (C)
Figure 8: Differential Responsivity vs. Temperature
1500
Figure 9: Sensitivity vs. Temperature
-18.00 -18.50 -19.00
1400
Differential Responsivity (V/W)
1300
Sensitivity (dBm)
-19.50 -20.00 -20.50 -21.00 -21.50
3V 3.3V 3.6V
1200
1100
3V 3.3V 3.6V
1000
900 0 10 20 30 40 50 60 70 80 90
Case Temperature (C)
-22.00 0 10 20 30 40 50 60 70 80 90
Case Temperature (C)
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
5
AMT8302
MEASUREMENT METHODS
Lightwave Analyzer HP 8702D
Laser
Optical Attenuator
DUT Test Fixture Power Supply
Extinction Ratio = 3 dB
Figure 10: Test Setup for Frequency Response
BERT Pulse Pattern Generator Hybrid Coupler Limiting Amplifier
Error Detector
25 dB Gain
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio = 9 dB
Power Supply
Figure 11: Test Setup for Sensitivity
Pulse Pattern Generator
Digital Communication Analyser HP83480A
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio = 9 dB
Supply Power
Figure 12: Test Setup for Eye Measurements 6
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
AMT8302
VDD
0.1uF
VOUT 0.1uF
DUT 0.1 uF
VOUT
Figure 13: DUT Test Fixture Schematic
APPLICATION INFORMATION
VDD
0.1uF 1
OUT
4
0.1uF
CF
OUT AGC
2
RO
0.1uF LIMITING AMPLIFIER
Charge Pump
7.5 GHz OSC
3
Figure 14: Application Schematic
CF is an optional single pole noise filter CF = 2 fcR fc is the desired cutoff frequency R = 50 RO is required with high input resistance limiting amplifiers RO = 100
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
1
7
AMT8302
COMPONENT PACKAGING
Figure 15: T56F Package Outline
8
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
AMT8302
NOTES
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
9
AMT8302
NOTES
10
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
AMT8302
NOTES
PRELIMINARY DATA SHEET - Rev 1.2 06/2002
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AMT8302
ORDERING INFORMATION
ORDER NUMBER AMT8302T56F TEMPERATURE RANGE 0 oC to +80 oC PACKAGE DESCRIPTION TO-56 Ultra Flat Window Package COMPONENT PACKAGING -
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 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.
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PRELIMINARY DATA SHEET - Rev 1.2 06/2002

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