PX6420
Multi-Rate TIA/LA Optical Receiver
Product Brief
September 2004
Description
The growing use of the Internet has created
increasingly higher demand for multi-Gb/s I/O
performance. The demand and availability of 10
Gb/s+ WAN bandwidth fuels the growth of native
10 Gb/s infrastructures within MAN and enterprise
datacenters.
®
The Primarion PX6420 10 Gb/s receiver is a
single channel TIA/LA optical receiver designed for
various 10 Gb/s PMD applications. It consists of a
transimpedance amplifier and an AC-coupled
differential limiting amplifier.
Features
•
Integrated transimpedance and limiting
amplifier for serial optical receiver
applications
The transimpedance amplifier achieves a nominal
bandwidth of 8 GHz over a wide range of
photodiode input capacitance. A photodiode bias
current monitor allows for a simple alignment
procedure.
•
•
Receiver sensitivity 20 µApp for 10-12 BER at
10 Gb/s
Receive signal strength indicator (RSSI) for
digital diagnostics and active alignment
The transimpedance amplifier is AC-coupled
internally to a high-gain, high-bandwidth, limiting
•
•
Loss of signal indicator (LOS)
Optional squelch circuit disables output at low
input levels
amplifier. The limiting amplifier provides
a
differential back-terminated CML output that can
be used to drive 10 Gb/s Serdes or other CML
compatible circuits.
•
•
•
Back-terminated 50-ohm CML output
providing 250 mVpp differential amplitude
Full diagnostics are delivered through loss of
signal, squelch, and received signal strength
indicator circuits.
No external passives required for photodiode
bias network
Single +3.3 V supply dissipating 115 mW
Applications
•
850 nm and 1310 nm receive optical sub-
assemblies (ROSA)
•
•
•
XFP, X2, XPAC, XENPAC optical modules
10GbE, 10GFC, 8GFC, 4GFC, OC-192 VSR
Proprietary back plane optics
1
Zarlink Semiconductor Inc.
