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Using the X9530 in fibre optic applications

Posted: 31 Aug 2009     Print Version  Bookmark and Share

Keywords:fibre optics  X9530 application  memory 

Fibre optics is used more and more everyday in the areas of telecommunications and data networks. Transmitter boards used in such networks as SONET and SDH, commonly use fibre optics to provide high bandwidth telecommunications. System designers are also utilising fibre optic transceiver modules when building high-speed data networks. These make use of fibre optics in such common devices as hubs, switches, routers and even network interface cards (NICs).

With fibre optics rapidly coming into the mainstream, there is an ever present need to reduce transceiver module size and cost. Thus, engineers are continuously pressed to look for new and innovative methods to obtain the maximum performance from their designs.

The X9530 from Intersil provides the fibre optic module designer with a key component for increasing the performance of the design, while at the same time reducing overall cost, component count, and required board area.

One requirement of many new fibre optic designs is higher data rate. To accomplish this, designers must compensate and control the various laser characteristics that change over time, such as temperature drift. The X9530 incorporates an on-chip temperature sensor, an ADC and a lookup table based method of temperature compensation. This gives the designer a highly flexible tool with which to "tune out" adverse temperature effects of the laser diode. Overall system performance can be increased by the dynamic variation of critical circuit control parameters.

General purpose EEPROM memory is also integrated into the X9530. This allows for board / module parameters or manufacturing data to be stored in the device, without the need for an additional memory IC. All communications to/from the X9530 are conducted over a 2 wire serial bus, compatible with an industry standard I²C interface.

These key functions of the X9530 from Intersil, makes the device ideal in for use in applications such as GBIC, SFP, XENPAK or other high data rate fibre optic modules. This application note illustrates to the reader how the functions of the X9530 may be used in typical fibre optic designs.

View the PDF document for more information.

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