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PMC module includes dual Virtex-5 FPGAs

Posted: 21 May 2009     Print Version  Bookmark and Share

Keywords:PMC  signal processing  FPGA  radio transceiver 

Model 7156 dual channel transceiver

Pentek has introduced its latest PMC module, the Model 7156 dual channel transceiver. The new module includes two 400 MHz A/D converters with 14-bit resolution and two 800 MHz D/A converters with 16-bit resolution. Both data converters on the 7156 use new Texas Instruments monolithic devices, the ADS5474 and the DAC5688, respectively.

While this module is immediately attractive to developers of military radio transceivers with high-bandwidth channels, the wideband data converters and multi-channel synchronisation also directly target new wideband radar applications.

This new PMC features a built-in clock synthesiser that accepts an external 5 or 10 MHz reference and synthesises two phase-locked, low-jitter clocks delivered separately to the A/D and D/A converters. A front panel digital connector synchronises multiple 7156's to support beamforming, diversity combining and phased array applications.

The TI DAC5688 provides an interpolation filter and a digital up-converter to translate a complex base band digital signal to an IF frequency up to 300 MHz and then deliver it through the D/A converter as an analogue IF output.

The dual FPGA architecture of the 7156 offers tremendous processing power with the flexibility to handle custom DSP algorithms in the signal processing FPGA and custom I/O functions in the interface FPGA.

Both FPGAs are members of Xilinx's Virtex-5 family allowing customers to choose specific FPGA devices for each to fulfil particular requirements. Available FPGAs include LXT devices with generous logic resources and SXT devices with a wealth of DSP resources for signal processing.

In addition to the 100 MHz 64-bit PCI-X interface, the 7156 also offers an XMC interface for gigabit serial I/O. Customers can install their own serial communication IP or popular I/O standards such as Xilinx's Aurora, a low overhead protocol ideal for high speed point-to-point connections.

"At these high sampling rates, embedded systems developers can reap huge benefits by processing data locally using on-board FPGA resources," said Rodger Hosking, vice president. "Towards that end, the dual FPGA architecture of the 7156 was tailored specifically for custom FPGA development."

"For applications that still need high transfer rates to the rest of the system, we've also added tremendous I/O capability to eliminate bottlenecks and boost throughput. Both FPGAs are equipped with multiple 4X gigabit serial links, each capable of moving data at 1.25 GB/sec. Flexible link path options connect both FPGAs to the XMC interface and to each other," he concluded.

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