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1.25 Gb/s Integrated 850 nm MSM-TIA
FEATURES * * * * * * 1.25 Gb/s Differential Output TIA 5.0V Operation Automatic Gain Control 850nm Photodetector with 100 mm2 Active Area Integrated MSM Detector & TIA TO46 Lens Package
AMT8100
Data Sheet - Rev1
APPLICATIONS * * Gigabit Ethernet (1.25 Gb/s) Fiber Channel (1.0625 Gb/s)
T46L TO-46L Lens Package
Product Description The ANADIGICS AMT8100 is a 5V 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
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 lens packaged receiver pass stringent reliability requirements. These products are readily designed into receivers and transceivers for Gigabit Ethernet and Fibre Channel applications.
Figure 1: AMT8100T46L Equivalent Circuit
V DD 2
4K OUT
1 3
OUT AGC
US Patents: 5047728, 5646573
PIN
4
AMT8100
Table 1: Absolute Maximum Ratings
V DD PIN TS 7.0 V + 5 dB m Storage Temp. - 65 C to 125 C
Table 2: Electrical Characteristics
PAR AMETER Wavelength (l ) D etector Acti ve Area Small Si gnal D i fferenti al Responsi vi ty (1) (@ 50 MHz) Bandwi dth (1) Low Frequency C utoff Output Resi stance Opti cal Overload (2) Opti cal Sensi ti vi ty (3) D i fferenti al Output Voltage D uty C ycle D i storti on (4), (6) RMS Ji tter (4), (6), (7) Total Ji tter (pk-pk) (4), (6), (8) Supply C urrent Operati ng Voltage Range Operati ng Ambi ent Temperature Range
(4), (5)
MIN 770 1000 800 25 0 -20 4.5 0
TYP 850 100 x 100 300 40 - 21 650 260 6 20 100 5.0 -
MAX 860 1500 1000 60 10 50 5.5 70
U N IT nm m2 V/W MHz kHz Ohm dB m dB m mV ps % ps ps mA V C
TRISE & TFALL (20 - 80%) (4), (5)
(1) (2) (3) (4) (5) (6) (7) (8)
Measured at 14 dBm optical input power with output connected into RL = 100W (differential) Measured at 10-12 BER with a 27-1 PRBS at 1.25 GB/s -10 7 Measured at 10 BER with a 2 -1 PRBS at 1.25 Gb/s. Input optical power = -3 dBm, RL = 100 W (differential). Measured with a 625 MHz, 50% duty cycle square wave. Measured with a 1.25 Gb/s, 27-1 PRBS. 1s about the center eye crossing. 6s about the center eye crossing.
Table 3: Package Pin Description
P IN 1 2 3 4 D E S C R IP TION V OUT - TIA Output Voltage (Non-i nverted) V DD - P osi ti ve S upply Voltage V OUT - TIA Output Voltage (Inverted) Ground C OMME N T Logi cal '1' wi th opti cal i nput +5 Volts Logi cal '0' wi th opti cal i nput C ase i s grounded
2
Data Sheet - Revision 1 03/01
AMT8100
Figure 2: Eye Diagram with an Optical Input Power of 17dBm Figure 3: Eye Diagram with an Optical Input Power of 1.0dB
10mV/Div
200ps/Div
150mV/Div
200ps/Div
Figure 4: Supply Current vs. Temperature
50.0 45.0
Supply Current (mA)
4.5V 5.0V 5.5V
Figure 5: Bandwidth vs. Temperature
1600.0
4.5V 5.0V
1400.0
Bandwidth (MHz)
5.5V
40.0 35.0 30.0 25.0 20.0 0 20 40 60 80 100
Ambient Temperature (C)
1200.0 1000.0 800.0 600.0 0 20 40 60 80 100
Ambient Temperature (C)
Figure 6: Differential Responsvity vs. Temperature
1600.0
4.5V
Figure 7: Sensitivity vs. Temperature
-20.0
4.5V
Differential Responsivity (V/W)
5.0V 5.5V
-20.5 -21.0
Sensitivity (dBm)
5.0V 5.5V
1400.0
-21.5 -22.0 -22.5 -23.0 -23.5
1200.0
1000.0 0 20 40 60 80 100
Ambient Temperature (C)
-24.0 0 20 40 60 80 100
Ambient Temperature (C)
Data Sheet - Revision 1 03/01
3
AMT8100
Figure 8: Test Setup for Frequency Response
Lightwave Analyzer HP 8702D
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio= 3dB
Power Supply
Figure 9: Test Setup for Sensitivity
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 10: Test Setup for Eye Measurements
Pulse Pattern Generator Digital Communication Analyzer HP83480A
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio = 9dB
Power Supply
4
Data Sheet - Revision 1 03/01
AMT8100
Figure 11: DUT Test Fixture Schematic
VDD
0.1uF
VOUT 0.1uF
DUT 0.1 uF
V OUT
Figure 12: Application Schematic
VDD 0.1uF 2
4K OUT
1 CF 3
0.1uF RO 0.1uF LIMITING AMPLIFIER
OUT AGC
4
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 - Revision 1 03/01
5
AMT8100
Figure 13: Evaluation Board Schematic
VDD 0.1uF 2
4K OUT
1
0.1uF
VOUT VOUT
OUT AGC
3 0.1uF
4
Figure 14: Evaluation Board Layout
6
Data Sheet - Revision 1 03/01
AMT8100
Figure 15: T46L Package Outline Diagram
Data Sheet - Revision 1 03/01
7
AMT8100
Ordering Information
Part N umber AMT8100T46L Package Option TO-46L Package D escription 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 discontinue any product at any time without notice. The Advanced Product data sheets and product specifications contained in this data sheet are subject to change prior to a products formal introduction. The information in this data sheet has been carefully checked and is assumed to be reliable. However, ANADIGICS assumes no responsibility 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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