VSC7971, 7973
B E N E F I T S :
Source terminated differential outputs with linear photocurrent
monitor offers diagnostic capabilities without sacrificing high
signal integrity.
On-chip filter provides positive bias to the photodetector,
eliminating the need for external components, saving space
and cost.
Available in a TO-46 package, eliminating time and costs
associated with the design, assembly and test of the receiver.
S P E C I F I C A T I O N S :
VSC7971 and VSC7973
-
Input Noise: 550 nA (rms)
-
Bandwidth: 2.0 GHz
-
Supply Current: 25mA
-
Sensitivity : -23dBm (long wave) -21.5dBm (short wave)
-
Max Input Current: 2.2mA peak to peak current
-
Power Dissipation: 82.5mW
-
Supply Voltage: 3.3V
-
Operating Temperature from -40
C to 85C
-
Package (VSC7971): Dice, 5-pin TO-46 (1310nm/1550nm)
-
Package (VSC7973): Dice, 5-pin TO-46 (850nm)
B L O C K D I A G R A M :
2.5 Gb/s Transimpedance Amplifier with Photocurrent Monitor
A P P L I C A T I O N S :
Gigabit Ethernet Transceivers
Fibre Channel Transceivers
SONET/SDH Transceivers
SONET/SDH Transponders
2.5 Gb/s Receiver Optical Sub-Assemblies
F E A T U R E S :
Single +3.3V Supply
6k
Differential Transimpedance
2GHz Small Signal Bandwidth
Low Power Consumption for SFP/SFF Applications
Differential Outputs with Linear Current Monitor
Available as Bare Dice or in a 5-pin TO-46 Package
.
PHYSICAL LAYER PRODUCTS
PB-VSC7971,7973-001
50
500
VSC7971
+3.3V
0.1
F
VOUTP
VCC
Outputs need to
be AC-coupled
VOUTN
IMON
0.1
F
50
Monitor
FILTER
10pF
IN
GND
For more information on Vitesse Products visit the Vitesse web site
at www.vitesse.com or contact Vitesse Sales at (800) VITESSE
or sales@vitesse.com
2003 Vitesse Semiconductor Corporation
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
The VSC7971 and VSC7973 are high-performance
Transimpedance Amplifiers (TIA) for Ethernet,
Fibre Channel, and SONET applications up to 2.5
Gb/s. They feature 6k
differential transimpedance
and 2GHz bandwidth with source-terminated differential outputs. Both
devices have a linear photocurrent monitor output, adding diagnostic
capabilities. A space-saving filter connection is provided for a
positive bias to the photodetector through an on-chip 500
resistor to
VCC, allowing for easy assembly on a TO-46 header.
They both operate from a single +3.3V supply. The VSC7971 is offered
as bare dice or in a 5-pin TO-46 package with a 1310nm PIN
photodetector. The VSC7973 is offered as bare dice or in a 5-pin TO-
46 package with an 850nm PIN photodetector.
A P P L I C A T I O N D I A G R A M :
G E N E R A L D E S C R I P T I O N :
2.5 Gb/s Transimpedance Amplifier with Photocurrent Monitor
VSC7971,7973
VSC7971-W
VSC7973-W
VSC7971-WE
VSC7973-WE
Monitor
VSC7959
VSC7961
Limiting
Amplifier
VSC7939
IMON
VSC7940
Laser
Driver
PDF 
ZIP