2.6GHz ADC is optimised for aerospace & defence

22nd May 2015

Analog Devices

Barney Scott

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Datasheet

Analog Devices has introduced a 2.6GHz ADC, engineered to address the high-bandwidth and dynamic-range needs of aerospace and defence applications. The 12-bit AD9625BBP-2.6 is optimised to match the frequency planning and signal sensitivity requirements of advanced electronic surveillance and counter-measure applications, such as radar systems, secure communications networks and electronic signals monitoring.

Benefiting from a combination of giga-sample-rate speed and 75dBc Spurious-Free Dynamic Range (SFDR) performance up to 1.8 GHz, the converter is available in a tin-lead (SnPb) package that ensures high-reliability operation by eliminating the performance degradation and added cost associated with alternative packaging materials that are susceptible to tin-whiskering.

The AD9625BBP-2.6 ADC is the latest addition to ADI’s wideband RF signal processing solutions portfolio, which provides key high-reliability aerospace and defense applications with previously unavailable dynamic performance and packaging options for better signal extraction in noisy RF environments over a wider bandwidth than ever before.

The AD9625BBP-2.6 provides a 150dBFS/Hz noise floor and 75dBc SFDR to 1.8GHz. This level of performance means designers can discern by four times smaller signals in the presence of noise, clutter, blockers and interferers. The converter is designed for sampling wide bandwidth analog signals and can be used up into its third Nyquist zone. Its wider input bandwidth enables advanced RF sampling architectures that reduce the number of analog frequency down-conversion stages and their associated noise and cost contributions. The simplified system architecture eliminates the need to interleave multiple ADCs to obtain needed performance and allows for the development of reconfigurable platforms.

The AD9625BBP-2.6 simplifies the digital interfacing challenge by integrating two digital-down converters, two numerically controlled oscillators and a configurable JESD204B serial link for the output data. These features improve usability and functionality by reducing output-data-rate requirements and simplifying board-level design and layout.

Additionally, the converter’s high-reliability SnPb package is better suited to demanding aerospace and defense applications by eliminating tin-whiskering concerns. This removes the costly and time-consuming process of package re-plating, re-balling and PCB conformal recoating – steps that often are required by other, less robust packaging materials and that can void the manufacturers’ warranty.