VSC7718, VSC7728
GPON and GE-PON OLT Transimpedance Amplifier and Limiting Amplifier Chipset
GENERAL DESCRIPTION:
The VSC7718 transimpedance amplifier (TIA) and VSC7728 post amplifier
together form a complete chipset solution for Gigabit-capable Passive
Optical Networks (GPON) and Gigabit Ethernet Passive Optical Networks
(GE-PON) OLT burst-mode receivers. This chipset exceeds GPON
requirements with better than –33 dBm sensitivity, industry-leading
overload performance of better than –4 dBm and over 23 dBm of dynamic
range.
Designed to be used in conjunction with one another, the VSC7728
supplies a reset signal to the VSC7718 in order to control its internal offset
correction circuitry, providing fast settling times with immunity to long
streams of consecutive identical digits. The VSC7718 also features a
space-saving filter connection provided for positive bias to a PIN diode
through a filter resistor to VCC.
The VSC7718 is available as bare die with padout optimized for standard
4-pin, 5-pin and 6-pin TO-46 packages. The VSC7728 is available in a
16-pin, 3mm x 3mm QFP package.
BLOCK DIAGRAM:
RESET Signal from OLT MAC
VCC
APD
Supply
RESETP
RESETN
RTHAD
VCC
VSC7718
VSC7728
Signal Detect
Threshold Adjust
Block
VOUTP
LINP
Outgoing
RESET
Signall Block
LA
LOUTN
FILTER
PD
IN
Incoming
RESET
Signal
INTERNAL
RESET
LOUTP
TIA
VOUTN
LINN
GND
RMON
DATRDYP
DATRDYN
GND
(Data Ready Indicator for CDR)
Trademarks
TM
Vitesse, ASIC-Friendly, FibreTimer, TimeStream, Snoop Loop, Super FEC, FOCUSConnect, Meigs-II, Meigs-IIe, Lansing, Campbell-I, Barrington,
PaceMaker, HOVCAT48, HOVCAT48e, HOVCAT192, HOVCAT192e, Micro PHY, FOCUS32, FOCUS16, IQ2200, NexSAS, VersaCAT, GigaStream, HawX,
SparX, StaX, VstaX, SimpliPHY,VeriPHY, ActiPHY, XFP PRO, SFP PRO, Smart-LINK, OctalMAC, EQ Technology are trademarks in the United States and/or
other jurisdictions of Vitesse Semiconductor Corporation. All other trademarks or registered trademarks mentioned herein are the property of their respective
holders.
Copyright © 2006
Vitesse Semiconductor Corporation (“Vitesse”) retains the right to make changes to its products or specifications to improve performance, reliability or
manufacturability. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is
subject to change without notice at any time. While the information furnished herein is held to be accurate and reliable, no responsibility will be assumed by
Vitesse for its use. Furthermore, the information contained herein does not convey to the purchaser of microelectronic devices any license under the patent
right of any manufacturer.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
sales@vitesse.com
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
