DCM-V5-XMC Digital Receiver
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DCM-V5-XMC Digital Receiver High-Speed A/D and D/A Conversion with Virtex™-5 FPGA Processing • Flexible, high-performance data conversion • 14-bit analog-to-digital at up to 250 MSPS • 12-bit digital-to-analog at up to 2.3 GHz • Complementary to Echotek™ Series RF 1800GT Wideband Microwave Receiver The Echotek™ Series DCM-V5-XMC Digital Receiver from Mercury Computer Systems implements a flexible FPGA-based architecture in a space-efficient mezzanine card form factor. The module combines the latest in high-performance A/D conversion with an ultra high-speed D/A converter, both working in conjunction with a powerful Xilinx® FPGA. The userprogrammable Virtex-5 FPGA functions as the primary data processor, supported by Mercury’s EchoCore™ firmware library. With this set of flexible resources, the DCM-V5-XMC delivers unique capabilities, such as multi-board coherency, while addressing a range of analog signal requirements found in SIGINT, ELINT, Radar and Weather Tracking applications, as well as advanced scientific equipment such as particle accelerators. Data Conversion Analog data conversion is accomplished via two, single IF channel, Texas Instruments ADS6149 analog-to-digital converters. The ADS6149 is capable of digitizing IF signals with 14 bits of precision at sample rates of up to 250 MHz, making this unit ideal for sampling IF frequencies of 70 MHz, 140 MHz, and even 160 MHz. Digital data conversion is performed via a single-channel Maxim MAX19692 digital-to-analog converter. The MAX19692 can reconstruct at up to 2.3 GHz, with 12 bits of precision, making this unit perfect for outputting high bandwidth signals. The EchoCore™ Advantage Mercury’s EchoCore firmware streamlines the development of FPGA-based applications. These cores are optimized to deliver maximum performance for a range of common operations. They are designed with straight-forward interfaces for applicationspecific algorithm IP, greatly reducing the time required to create complete solutions. Included for the DCM-V5-XMC from Mercury’s vast array of available cores are the EchoCore Wideband DDC, the EchoCore Narrowband DUC, EchoCore Aurora Interface, EchoCore DDR-II-SDRAM Interface, and the EchoCore PCIe Auto DMA Interface. FPGA Configuration The DCM-V5-XMC is a flash-based module capable of storing multiple images. Each FPGA core image is loaded over the PCIe bus to flash memory, which, at 128 MB, can hold up to eight 16-MB flash images. Any FPGA image can be selected to load automatically on power-up or at any time under user control. Both the FPGA itself and the flash memory can be reprogrammed at any time. A/D Clock In A/D Sync In A/D Sync Out D/A Clock In D/A Sync In FPGA Resources Ever-changing mission requirements demand flexibility in programmable logic devices, as well as a level of performance to deal with unrelenting high-bandwidth data streams. This is why the DCM-V5-XMC employs a Xilinx Virtex-5 SX95T highperformance FPGA. This 1136-pin package FPGA provides a multitude of high-performance resources, including 58,880 logic cells, 14,720 slices, and 640 DSP48e blocks in a single device. These raw resources make the Virtex-5 FPGA ideal for computationally intensive applications such as digital down-conversion, Fast Fourier transforms (FFTs), and data filtering. Clock and Sync Logic DDR-II SDRAM D/A Sync Out IF Input 1 IF Input 2

This XMC card also features 128 MB of DDR-II SDRAM, accessible by user-programmable applications. This memory utilizes a 250 MHz, 32-bit-wide link to the Virtex-5 FPGA for a total bandwidth of 2.0 GB/s, half-duplex. A/D Conversion Input channels 2 A/D type Texas Instruments ADS6149 Resolution 14 bits Speed 250 MSPS Software Mercury provides driver applications for the DCM-V5-XMC supported by the Red Hat® Enterprise Linux® 5 operating system. Alternative OS support may be made available on request. Clock Inputs The module design allows users to insert separate clocks for the A/D and D/A. The...