GN2014A Datasheet, PDF (1/18 Pages) Gennum Corporation – XFP Tx Signal Conditioner with VCSEL Driver

GN2014A XFP Tx Signal Conditioner with VCSEL Driver
Features
Applications
• XFP Datacom Compliant Transmit Signal Conditioner
• Integrated VCSEL driver with Cross Point Adjust
functionality to optimize optical performance
• Single 3.3V supply
• Power dissipation: 300mW (typical, assuming 700mVppd
data output amplitude)
• Multi-rate operation: 9.95Gb/s – 11.3Gb/s
• No reference clock required
• Laser shut down option
• Automatic input offset correction
• On chip 100Ω differential I/O termination
• Loss of Lock indicator
• Loopback differential output
• CDR Bypass Option
• Bit Inversion capability
• Transmit path signal conditioner for XFP and SFP+
transceiver modules
General Description
The GN2014A is a transmit path signal conditioner with
integrated VCSEL driver designed to offer power and cost
savings relative to external laser driver solutions. The
GN2014A provides integrated modulation and eye shaping
capability while maintaining pin compatibility with
previous generation parts.
RTEn
POLInv
LBEn
EQIP
EQIN
DC OFFSET
CORRECTION
CIRCUIT
EQUALIZER
LOS CIRCUIT
(Note 1)
PHASE
DETECTOR
LOCK
DETECTOR
LOS
CHARGE PUMP/
LOOP FILTER
VCO
D
CLK Q
0S
MUX
1
INVERTER
LBO
BUF
SDO
BUF
LBOP
LBON
SDOP
SDON
LOL
LBWCtrl
LF
Note 1: The LOS Threshold is set by defualt to 100mVppd.
Figure A: GN2014A Block Diagram
LDDisable
SWNGSel
CPA
CPAPol
SERDES/
ASIC
10Gb/s
10Gb/s
LINE CARD
XFP MODULE
GN2014A
GN2003S
TIA
GN1052
LASER
DIODE
PHOTO
DIODE
LINE CARD
XFP MODULE
PHOTO
DIODE
LASER
DIODE
TIA
GN1052
GN2003S
GN2014A
10Gb/s
10Gb/s
SERDES/
ASIC
Figure B: Typical Usage
GN2014A XFP Tx Signal Conditioner with VCSEL Driver _{www.gennum.com}
Data Sheet
39260 - 8
May 2010
1 of 18
Proprietary & Confidential