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VSC7809WD Datasheet

  • VSC7809WD

  • Telecomm/Datacomm

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VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
VSC7809
Features
鈥?Integrated Photodetector/Transimpedance
Amplifier Optimized for High-Speed Optical
Communications Applications
鈥?Fibre Channel/Gigabit Ethernet Compatible
鈥?High Bandwidth
Bandwidth
(MHz)
800
Photodetector/Transimpedance Amplifier
Family for Optical Communication
鈥?Low Input Noise Equivalent Power
鈥?Large Optically Active Area
鈥?Single 3.3V Power Supply
Part Number
VSC7809
Data Rate
1.25Gb/s
Input Noise
(
碌
W rms)
1.4
Optically Active Area
(
碌
m diameter)
100
General Description
The VSC7809 integrated Photodetector/Transimpedance Amplifier provides a highly integrated solution
for converting light from a fiber optic communications channel into a differential output voltage. The benefits
of Vitesse Semiconductor鈥檚 Gallium Arsenide H-GaAs process are fully utilized to provide very high bandwidth
and low noise in a product with a large optically active area for easy alignment. The sensitivity, duty cycle dis-
tortion and jitter meet or exceed all Fibre Channel and Gigabit Ethernet application requirements. Parts are
available in either die form, flat-windowed packages or in ball-lens packages.
By using a metal-semiconductor-metal (MSM) photodetector with a monolithic integrated transimpedance
amplifier, the input capacitance is lowered which allows for a larger optically active area than in discrete photo-
detectors. Integration also allows superior tracking over process, temperature and voltage between the photode-
tector and the amplifier, resulting in higher performance. This part can easily be used in developing Fibre
Channel Electro-Optic Receivers which exhibit very high performance and ease of use.
VSC7809 Block Diagram
Photodetector/Transimpedance Amplifier
+3.3V
DOUTP
DOUTN
GND
Both DOUTP and DOUTN are back-terminated to 25鈩?
G52195-0, Rev 4.0
07/02/01
漏
VITESSE
SEMICONDUCTOR CORPORATION
鈥?741 Calle Plano 鈥?Camarillo, CA 93012
Tel: (800) VITESSE 鈥?FAX: (805) 987-5896 鈥?Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1

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