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2.125 Gb/s Integrated 850nm MSM-TIA
AMT8301
Data Sheet - Rev 2.1
FEATURES
* * * * * * Differential Output TIA 3.3V Operation Automatic Gain Control Integrated 850nm MSM Detector & TIA TO-46 Ultra Flat-Window or Lens Hermetic Package High Reliability
APPLICATIONS
* 2x Fibre Channel (2.125 Gb/s)
T46F TO-46 Ultra Flat Window Package
T46L TO-46 Lens Package
PRODUCT DESCRIPTION
The ANADIGICS AMT8301 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
V DD 2
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 2X Fibre Channel applications.
OUT
1 3
OUT AGC
US Patents: 5047728, 5646573
PIN
Charge Pump 7.5 GHz Osc
4
Figure 1: AMT8301 Equivalent Ciruit
03-2001
1
AMT8301
Figure 2: T46F/T46L Pin Outline (Bottom View)
Table 1: Package PIN Description PIN 1 2 3 4 D ESC R IPTION VOUT - TIA Output Voltage (non-Inverted) VDD - Posi ti ve Supply Voltage VOUT - TIA Output Voltage (Inverted) Ground C OMMEN T Logi cal '1' wi th opti cal i nput +3.3 Volts Logi cal '0' wi th opti cal i nput C ase i s grounded
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Maximum Ratings
V DD PIN TS 6.0V +5dBm Storage Temp. - 65 C to 125 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.
2
Data Sheet - Rev 2.1 03-2001
AMT8301 Table 3: Electrical Characteristics
PAR AMETER Wavelength ( l) D etector D i ameter Small Si gnal D i fferenti al Responsi vi ty (@ 50 MHz) Bandwi dth(1) Low Frequency C utoff Output Resi stance Opti cal 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
U N IT nm m V/W MHz kHz
W
dB m dB m mV ps % ps mA Volts C
Opti cal Sensi ti vi ty (2) D i fferenti al Output Voltage TRISE and TFALL (20-80%) (3) D uty C ycle D i storti on (3) Total Ji tter (3), (4) Supply C urrent Operati ng Voltage Range Operati ng C ase Temperature Range
+ 3.0 0
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 2.125 Gb/s (3) Measured with a 27-1 PRBS at 2.125 Gb/s, an input optical power of -3dBm and RL = 100 W (differential) (4) 6 s about the center eye crossing
Data Sheet - Rev 2.1 03-2001
3
AMT8301
PERFORMANCE DATA
Figure 3: Eye Diagram with an Optical Input Power of -18dBm
10mV/Div
100ps/Div
Figure 4: Eye Diagram with an Optical Input Power of -8.0dBm
60mV/Div.
100ps/Div
Figure 5: Eye Diagram with an Optical Input Power of 0dBm
150mV/Div. 4
Data Sheet - Rev 2.1 03-2001
100ps/Div
AMT8301 Figure 6: Supply Current vs. Temperature
50.0 45.0 40.0 35.0
3V Bandwidth (MHz)
Figure 7: Bandwidth vs. Temperature
2400 2200 2000 1800 1600 1400 1200 1000
3V 3.3V 3.6V
Supply Current (mA)
30.0 25.0 0 20 40 60
3.3V 3.6V
80
100
0
20
40
60
80
100
Case Temperature (C)
Case Temperature (C)
Figure 8: Differential Responsivity vs. Temperature
1500
Differential Responsivity (V/W)
Figure 9: Sensitivity vs. Temperature
-18.00 -18.50
Sensitivity (dBm)
1400 1300 1200 1100 1000 900 0 20 40 60 80 100
Case Temperature (C) 3V 3.3V 3.6V
-19.00 -19.50 -20.00 -20.50 -21.00 -21.50 -22.00 0 20 40 60 80 100
Case Temperature (C) 3V 3.3V 3.6V
Data Sheet - Rev 2.1 03-2001
5
AMT8301
MEASUREMENT METHODS
Lightwave Analyzer HP 8702D
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio= 3dB
Power Supply
Figure 11: Test Setup for Frequency Response
BERT
Pulse Pattern Generator
Error Detector
Hybrid Coupler
Limiting Amplifier
25 dB Gain
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio = 9dB Power Supply
Figure 12: Test Setup for Sensitivity
Pulse Pattern Generator
Digital Communication Analyzer HP83480A
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio = 9dB
Power Supply
Figure 13: Test Setup for Eye Measurements 6
Data Sheet - Rev 2.1 03-2001
AMT8301
VDD
0.1uF
VOUT 0.1uF
DUT 0.1 uF
VOUT
Figure 3: DUT Test Fixture Schematic
APPLICATION INFORMATION
V
DD
0.1uF 2
OUT
1 CF 3
0.1uF RO 0.1uF
OUT AGC
LIMITING AMPLIFIER
Charge Pump
7.5 GHz OSC
4
Figure 14: Application Schematic
CF is an optional single pole noise filter
CF =
1 2 fcR
fc is the desired cutoff frequency R = 50 W RO is required with high input resistance limiting amplifiers RO = 100 W
Data Sheet - Rev 2.1 03-2001
7
AMT8301
PACKAGE OUTLINE
Figure 15: T46F Package Outline Diagram
8
Data Sheet - Rev 2.1 03-2001
AMT8301
Figure 16: T46L Package Outline Diagram
Data Sheet - Rev 2.1 03-2001
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AMT8301
NOTES
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Data Sheet - Rev 2.1 03-2001
AMT8301
NOTES
Data Sheet - Rev 2.1 03-2001
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AMT8301
ORDERING INFORMATION
Part N umber AMT8301T46F AMT8301T46L Package Option TO-46F TO-46L Package D escription Ultra Flat Wi ndow Package Lens Package
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
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 products 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. Data Sheet - Rev. 1 03-2001
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