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PX5410 Multi-Rate VCSEL Driver Product Brief
January 2004
Description
410 PX5
Features * * * * * * * * Up to 4.25 Gb/s serial VCSEL driver Single +3.3 V supply Average power control (APC) provides constant output optical power Digital diagnostics provided with bias, photodiode, and temperature monitors Independent temperature compensation for VCSEL bias and modulation current VCSEL fault protection limits output optical power for laser safety Differential CML compatible inputs with on-chip termination 4 mm x 4 mm QFN package
The growing use of the Internet and the increasing demand for storage area network (SAN) solutions has created the need for next generation physical layer ICs. In addition the introduction of 4 G Fiber Channel (4GFC) has introduced the need for next generation ICs to be backwards compatible with 1 G and 2 G Fiber Channel. The Zarlink PX5410 provides a multi-rate VCSEL driver solution for 1, 2, and 4GFC. The Zarlink PX5410 Multi-Rate VCSEL Driver is designed for various applications up to 4.25 Gb/s. It consists of a DC-coupled amplifier with adjustable modulation and bias currents optimized for driving commercially available VCSEL-based transmit optical sub assemblies (TOSAs) from a single +3.3 V supply. VCSEL modulation and bias currents can be programmed by a variety of means including external resistors, programmable potentiometers, SFF-8472 controllers, or microcontroller DAC outputs. Selectable temperature compensation and closed-loop average power control deliver optimized optical output power and extinction ratio over temperature.
Applications * * * SFP, SFF form factors 4GFC, 2GFC, 1GFC, OC-48, Gigabit Ethernet Proprietary intra-system optics
1
Zarlink Semiconductor Inc.
PX5410
Product Brief
Figure 1: Filtered 4.25 Gb/s optical output with a PRBS7 data pattern
Interrupt
+3.3V
Temp Sensor
Figure 2: Typical APC closed-loop configuration using TOSA monitor photo diode to provide constant VCSEL output power. Modulation current temperature compensation also enabled to improve extinction ratio across operating temperatures.
*
Disable
Tx_Flt Tx_Dis VCC VCC VCC TC_Mod TC_Bias VTherm
GND
Tx_Bias Tx_Out Tx_Bias GND Monitor Transmission Line
TOSA
VCSEL Anode VCSEL Cathode
Data_P Data_N
Tx_In_P Tx_In_N
GND Bias_Mon
PD Cathode
Pwr_Mon RSafe RMod RBias RPower Comp
TOSA PD monitor
Interrupt
+3.3V
Temp Sensor
Figure 3: Typical open-loop configuration with internal temperature compensation enabled for bias and modulation currents.
*
Disable
Tx_Flt Tx_Dis VCC VCC VCC TC_Mod TC_Bias VTherm Tx_Bias Transmission Line
GND
TOSA
VCSEL Anode VCSEL Cathode
Data_P Data_N
Tx_In_P Tx_In_N GND
Tx_Out Tx_Bias GND Monitor
Bias_Mon
VCSEL bias monitor
PD Cathode
Pwr_Mon RSafe RMod RBias RPower Comp
* See Table 2 for temperature
compensation configurations
2
Zarlink Semiconductor Inc.
For more information about all Zarlink products visit our Web Site at
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Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in and I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE

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