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Multi-channel PMC module is DC-coupled

Posted: 21 Sep 2004 ?? ?Print Version ?Bookmark and Share

Keywords:interactive circuits and systems? ics-554D? ics-554c? pmc module?

Board maker Interactive Circuits and Systems Ltd (ICS) is debuting its ICS-554D, a DC-coupled version of the company's 4-channel ICS-554C A/D PMC module. The ICS-554D's base price starts at about $6,500.

High-speed baseband sampling

The latest ICS-554D builds on the ICS-554C design, but was created for high-speed baseband sampling requirements. As such, it can be used for a variety of communications, radar and test-and-measurement applications. The DC-coupled inputs are useful for baseband sampling in SDR (software defined radio) implementations.

The new ICS-554D includes up to four ADCs that sample synchronously at frequencies up to 105MHz. The use of up to four high-res ADCs handles acquisition of large bandwidth signals, while retaining signal integrity and providing a large dynamic range. The on-board converters also support channelization, and ICS claims its board can provide the highest channel density.

Large FPGA on-board

Once digitized, on-board baseband signal processing is performed in a 3-million gate Xilinx Virtex-II XC2V3000 FPGA that's virtually free for user coding. The FPGA needs no ICS control logic.

Pre-defined FPGA cores are also available. These include functions such as FPDP (front panel data port) interfaces, wideband digital down-Converters, and realtime FFT (fast Fourier transform) with power detection and spectral averaging, to name a few.

The module also includes four Graychip GC4016 quad digital down-converters. These can be used for simultaneous down-conversion of up to sixteen FDM (frequency division MUXd) bands.

Performance wise, typical in-system signal-to-noise ratio (SNR) is 67dB over the full band (50MHz), and the typical in-system spurious-free dynamic range (SFDR) is >80dB (for a 50-ohm input impedance option). The system's input impedance is 50 ohms, but you can order optional high-Z (1 megohm) versions.

The ICS-554D also offers on-board storage and a fast PCI 2.2-compatible 64-bit 66MHz DMA interface. It also has an uncommitted Pn4 connector for direct data transfer. The Pn4 user-I/O supports LVDS (low voltage differential signaling) for high-speed data transfer.

For more info, users can register with ICS and download some app notes, namely Tech Note #45, and Application Note AN-SR-18.

- Alex Mendelsohn


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