VSC7802/7805 Features Integrated Photodetector/Transimpedanc
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VSC7802/7805
Features
Integrated Photodetector/Transimpedance Amplifier Family Optimized High Speed Optical Communications Applications Integrated Fibre Channel Compatible Speed: [1/4 &1/2 Speed]
Bandwidth (MHz)
Photodetector/Transimpedance Amplifier Family Optical Communication
High Bandwidth Input Noise Equivalent Power Large Optically Active Area Single Power Supply
Input Noise rms)
0.75
Part Number
VSC7802 VSC7805
Fibre Channel Speed
Speed: Mb/s Speed: Mb/s
Optically Active Area diameter)
General Description
VSC7802/VSC7805 series integrated Photodetector/Transimpedance Amplifiers provide highly integrated solution converting light from fiber optic communications channel into differential output voltage. benefits Vitesse Semiconductor's Gallium Arsenide H-GaAs-III process fully utilized provide very high bandwidth noise product with large optically active area easy alignment. sensitivity, duty cycle distortion jitter meet exceed Fibre Channel application requirements. Parts available either form flat-windowed packages. using integrated (Metal-Semiconductor-Metal) photodetector with integrated transimpedance amplifier, input capacitance lowered which allows larger optically active area than discrete photodetectors. Integration also allows superior tracking over process, temperature voltage between photodetector amplifier, resulting higher performance. These parts easily used developing Fibre Channel Electro-Optic Receivers which exhibit very high performance ease use.
VSC7802/7805 Block Diagram
Photodetector/Transimpedance Amplifier
Both have internal termination resistor
G52088-0,
4/22/98
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
Page
Photodetector/Transimpedance Amplifier Family Optical Communication
Table Electro-Optical Specifications Symbol
PSRR NEPo Iout
VSC7802/7805
Min.
Parameter
Supply Voltage Supply Current Power Supply Rejection Ratio Wavelength Frequency Cutoff Optical Modulation Bandwidth Dynamic Range Sensitivity Single Ended Output Impedance Differential Output Voltage Differential Responsivity Output Bias Voltage Bias Offset Voltage Input Noise Equivalent Power Output Noise Voltage Duty Cycle Distortion Output Rise Fall Time Output Drive Current Pattern Dependent Jitter Optically Active Area
Part
Typ.
-840 -500
Max.
-850 -2.5 0.75
Units
mV/µV psec. psec.
Conditions
(Includes External Filter) -3db, -3db,
7802 7805 7802 7805 7802 7805
24.2 22.9 -22.8 -21.5 0.25
Mb/s Mb/s
dBm, differential Rload
7802 7805 7802 7805 7802 7805 7802 7805 7802 7805
-1300
Normal Test Conditions -10% Voltage Window Diameter
Page
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
G52088-0, Rev.
4/22/98
VSC7802/7805
Table Absolute Maximum Ratings Symbol
Tstg Hstg Pinc Power Supply Storage Temperature Storage Humidity Operating Temperature Operating Humidity Incident Optical Power Impact Shock
Photodetector/Transimpedance Amplifier Family Optical Communication
Parameter
-40oC +85oC
Limits
%R.H. (Including Condensation) 70oC 80%R.H. (Excluding Condensation) Half Sine Wave Pulse Duration +/-0.5 Blows each direction 2000 Minutes Peak Acceleration Complete Cycles, Perpendicular Axes
Vibration
These specifications 5.6mm package only.
Figure Temperature
29.5 (mA) 28.5 27.5 Temp
G52088-0,
4/22/98
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
Page
Photodetector/Transimpedance Amplifier Family Optical Communication
VSC7802/7805
Figure Mechanical Specifications (Individual Die)
(4X) 0.355 0.06 (4X) 0.055 (4X) 0.11
0.596
(2X) 0.123 (2x) 0.156 (2X) 0.073 0.84 0.95
±0.05
±0.05
1.71
(2x) 0.84
1.85
0.055
0.42
0.625
±0.024
VSC7802
Note: measurements
Page
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
(2X) 0.147
(2X) 0.247
G52088-0, Rev.
4/22/98
VSC7802/7805
Photodetector/Transimpedance Amplifier Family Optical Communication
Figure Mechanical Specifications (Individual Die)
(4X) 0.355 0.052 (4X) 0.055 (2X) 0.123 (2X) 0.073 0.84 0.95
±0.05
(4X) 0.11
0.219
1.239
(2x) 0.747
(2x) 0.063
±0.05
1.135
0.055
0.42
0.625
±0.02
Note: measurements
VSC7805
G52088-0,
4/22/98
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
(2X) 0.147
(2X) 0.247
Page
Photodetector/Transimpedance Amplifier Family Optical Communication
VSC7802/7805
Figure Mechanical Package Specifications (5.6 Package)
2.54
SECTION SCALE NONE
0.65± 0.04
DETECTOR PLANE
3.85 0.05
(4X) 0.45 0.05
SECTION ROTATED SCALE NONE
(4X) 0.13
REFERENCE ISOMETRIC SCALE NONE
Note: measurements
Page
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
G52088-0, Rev.
0.25
4/22/98
VSC7802/7805
Ordering Information
Part Numbering Scheme:
Photodetector/Transimpedance Amplifier Family Optical Communication
VSC78XXYY
Where: Speed Grade Mb/sec Mb/sec
Package Style Individual Package
G52088-0,
4/22/98
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
Page
Photodetector/Transimpedance Amplifier Family Optical Communication
VSC7802/7805
Notes Measurement Conditions Applications
Note Noise Measurement Method
3GHz Hybrid Coupler Board
P1+P2
700MHz Pass Filter
Power Meter 437B with 8481D Power Sensor
Output Noise
noise voltage, output referred back noise power input through responsivity (with volts/watts)
error rate expressed Where:
exp(-Q2/2)
parameter
sensitivity(s) error rate
log10
calculated follows:
where units milliwatts dBm, respectively.
Page
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
G52088-0, Rev.
4/22/98
VSC7802/7805
Photodetector/Transimpedance Amplifier Family Optical Communication
Note 2:Measurement Setup Frequency Response
Lightwave Component Analyzer HP8702 Hybrid Coupler
Bias
Bias
Laser
Optical Attenuator
Power Supply
Note 3:Bias Schematic
Signal
Notice
This document contains preliminary information about product preproduction phase development. information this document based initial product characterization. Vitesse reserves right alter specifications, features, capabilities, functions, manufacturing release dates, even general availability product time. reader cautioned confirm this datasheet current prior using design.
Warning
Vitesse Semiconductor Corporation's product intended life support appliances, devices systems. Vitesse product such applications without written consent appropriate Vitesse officer prohibited.
G52088-0,
4/22/98
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
Page
Photodetector/Transimpedance Amplifier Family Optical Communication
VSC7802/7805
Page
VITESSE SEMICONDUCTOR CORPORATION Calle Plano, Camarillo, 93012 805/388-3700 FAX: 805/987-5896
G52088-0, Rev.
4/22/98
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