Four-Channel, 1.25 GHz D/A Module for Beamforming and Multichannel Waveform Generation

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A high-performing D/A converter module for RF and IF waveform playback delivers four independent analog outputs, each through its own digital upconverter.  It also offers 16-bit D/A with sampling rates to 1.25 GHz. The Cobalt Model 71670  includes an on-board Xilinx Virtex-6 FPGA that contains factory-installed IP to provide turnkey waveform playback functionality for output signal bandwidths up to 250 MHz. Users can also customize the module’s operation by implementing their own IP in the FPGA.

Channel independence in the Model 71670 is achieved with two new DAC3484 D/A converters from Texas Instruments (TI), each providing two digital upconverters (DUC) and 16-bit D/A channels with up to 16x interpolation that can translate a quadrature (I+Q) signal to a user-selectable IF center frequency. 

The Model 71670’s internal clock generator supports a wide range of timing modes and operates from an on-board programmable VCXO or an external clock. A front-panel connector accepts a 5 or 10 MHz reference clock to phase lock the internal programmable VCXO. The module also accepts a direct D/A sample clock input that can be as high as 1.25 GHz. 

The Model 71670 complies with the VITA 42.0 XMC interface specification, providing two gigabit serial connectors. The primary XMC connector supports x4 or x8 PCIe Gen 2 with multiple DMA controllers for efficient transfers to and from the module. The secondary connector supports two 4x or one 8x link with bit rates up to 3.125 GHz to support user-installed gigabit serial protocols such as Aurora, SRIO or a secondary PCIe interface. An additional I/O option provides 20 LVDS differential pairs to the FPGA through the PMC P14 connector.

The Model 71670 is available in several form factors, including XMC, VPX, cPCI and PCIe, and with a variety of FPGA sizes and speed grades. Pricing with 2GB of memory starts at $12,795 and delivery is 8 to 10 weeks ARO.


Upper Saddle River, NJ
(201) 818-5900.