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PX5420

Zarlink Semiconductor
Part Number PX5420
Manufacturer Zarlink Semiconductor
Description Multi-Rate TIA/LA Optical Receiver
Published Apr 10, 2007
Detailed Description www.DataSheet4U.com PX5420 Multi-Rate TIA/LA Optical Receiver Product Brief September 2004 Description The growing use...
Datasheet PDF File PX5420 PDF File

PX5420
PX5420

Overview
www.
DataSheet4U.
com PX5420 Multi-Rate TIA/LA Optical Receiver Product Brief September 2004 Description The growing use of serial optical modules in datacenter LAN and SAN infrastructures have created a need for multi gigabit optical modules.
The introduction of 4 Gb/s Fiber Channel standard for SANs is leading the data rate requirements for current 1 Gb/s and 2 Gb/s optical modules while demanding full backward compatibility.
The Zarlink PX5420 multi-rate TIA/LA optical receiver provides the performance and feature set required by competitive SFF and SFP optical modules.
The Zarlink PX5420 optical receiver is a single channel TIA/LA optical receiver designed for various applications to 4.
25 Gb/s.
It consists of a transimpedance amplifier (TIA) and an AC-coupled differential limiting amplifier (LA).
The transimpedance amplifier achieves a nominal bandwidth of 3 GHz over a wide range of photodiode input capacitance.
A photodiode bias current monitor allows for a simple alignment procedure.
The transimpedance amplifier is AC-coupled internally to a high-gain, high-bandwidth, limiting amplifier.
The limiting amplifier provides a differential back-terminated current-mode logic (CML) output that can be used to drive a 4.
25 Gb/s intra module post amplifier or directly drive to the edge of the module.
Full diagnostics are delivered through loss of signal, squelch, and received signal strength indicator circuits.
Features • Integrated transimpedance and limiting amplifier for serial optical receiver applications Receiver sensitivity 10 µApp for 10-12 BER at 4.
25 Gb/s Receive signal strength indicator (RSSI) Loss of signal indicator (LOS) Selectable squelch circuit disables output at low input levels Back-terminated 50-ohm CML output Selectable 250 mV or 650 mV differential output amplitude No external passives required for photodiode bias network Single +3.
3 V supply dissipating 100 mW • • • • • • • • Applications • • • Receive optical sub-assemblies (ROSA) 4GFC, 2GFC, ...


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