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AMT8504
1.25 Gb/s Integrated 850 nm MSM-TIA
FEATURES
* * * * * * * * Differential Output TIA 3.3V Operation Automatic Gain Control Integrated 850nm MSM detector & TIA 100 m m Detector Diameter TO-46 Ultra Flat Window or Lens Hermetic Package High Reliability -5 to +80C Operating Temperature Range
PRELIMINARY DATA SHEET - Rev 1
APPLICATIONS
* * Gigabit Ethernet (1.250Gb/s) Fibre Channel (1.0625 Gb/s)
TO-46F Ultra Flat Window Package
TO-46L Ball Lens 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
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 Gigabit Ethernet and Fibre Channel applications.
OUT
1 3
OUT AGC
US Patents: 5047728, 5646573
PIN
Charge Pump 7.5 GHz Osc
4
Figure 1: Equivalent Circuit
07/01
AMT8504
Figure 2: Pin Outline (Bottom View) Table 1: Package Pin Description
PIN 1 2 3 4
D ESC R IPTION VOUT - TIA Output Voltage (Non-i nverted) 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
2
PRELIMINARY DATA SHEET - Rev 1 07-01
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Maximum Ratings
V DD PIN TS 6.0 v + 5 dB m Storage Temp. - 65 C to 125C
AMT8504
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 Characteristics
PAR AMETER Wavelength (l ) D etector D i ameter 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
(2) (3)
MIN 770 1000 900 0 -20 + 3.0 -5
(3)
TYP 850 100 40 - 22 1000 260 4 80 +3.3 -
MAX 860 300 10 120 55 +3.6 80
U N IT nm m V/W MHz kHz Ohm dB m dB m mV ps % ps mA V C
D i fferenti al Output Voltage TRISE & TFALL (20 - 80%) D uty C ycle D i storti on (3) Total Ji tter (pk-pk) Supply C urrent Operati ng Voltage Range
(3), (4)
Operati ng C ase Temperature Range
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 7 (3) Measured with a 2 -1 PRBS at 1.25Gb/s, an input optical power of -3dBm and RL=100 W (differential) (4) 6s about the center eye crossing.
PRELIMINARY DATA SHEET - Rev 1 07-01
3
AMT8504
VDD
0.1uF
VOUT 0.1uF
DUT 0.1 uF
VOUT
Figure 3: DUT Test Fixture Schematic
4
PRELIMINARY DATA SHEET - Rev 1 07-01
AMT8504
PERFORMANCE DATA
Figure 4: Eye Diagram with an Optical Input Power Figure 5: Eye Diagram with an Optical Input Power of -17dBm of 0dBm
Figure 6: Supply Current vs. Temperature
50.0 Supply Current (mA) Bandwidth (MHz) 45.0 40.0 35.0 30.0 25.0 20.0 0 20 40 60 80 100
3.0V 3.3V 3.6V
Figure 7: Bandwidth vs. Temperature
2000
3.0V
1800 1600 1400 1200 1000 0 20 40 60 80
3.3V 3.6V
100
Case Temperature (C)
Case Temperature (C)
Figure 8: Differential Responsivity vs. Temperature
Differential Responsivity (V/W) 2000 1800 1600 1400
3.0V
Figure 9: Sensitivity vs. Temperature
-20.00
Sensitivity (dBm)
-21.00 -22.00 -23.00
3.0V
1200 1000 0 20 40 60 80
3.3V 3.6V
-24.00 -25.00
3.3V 3.6V
100
0
20
40
60
80
100
Case Temperature (C)
PRELIMINARY DATA SHEET - Rev 1 07-01
Case Temperature (C)
5
AMT8504
MEASUREMENT METHODS
Lightwave Analyzer HP 8702D
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio= 3dB
Power Supply
Figure 10: 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
Figure 11: Test Setup for Sensitivity
Power Supply
Pulse Pattern Generator
Digital Communication Analyzer HP83480A
Laser
Optical Attenuator
DUT Test Fixture
Extinction Ratio = 9dB
Power Supply
Figure 12: Test Setup for Eye Measurements
6
PRELIMINARY DATA SHEET - Rev 1 07-01
AMT8504
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 13: Application Schematic
CF is an optional single pole noise capacitor
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
PRELIMINARY DATA SHEET - Rev 1 07-01
7
AMT8504
VDD 0.1uF 2
OUT
1
0.1uF
VOUT VOUT
OUT AGC
3 0.1uF
Charge Pump
7.5 GHz OSC
4
Figure 14: Evaluation Board Schematic
Figure 15: Evaluation Board Layout
8
PRELIMINARY DATA SHEET - Rev 1 07-01
AMT8504
PACKAGE OUTLINE
Figure 16: T46F Package Outline Diagram
PRELIMINARY DATA SHEET - Rev 1 07-01
9
AMT8504
Figure 17: T46L Package Outline Diagram
10
PRELIMINARY DATA SHEET - Rev 1 07-01
AMT8504
NOTES
PRELIMINARY DATA SHEET - Rev 1 07-01
11
AMT8504
ORDERING INFORMATION
PAR T N U MB ER AMT8504T46F AMT8504T46L PAC K AGE OPTION TO-46F TO-46L PAC K AGE D ESC R IPTION Ultra Flat Wi ndow Lens
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. PRELIMINARY DATA SHEET - Rev 1 07-01
12

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