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ADI receiver can digitise IF frequencies from 70-450MHz

Posted: 13 Nov 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Analog Devices? IF receiver? instrumentation? CTBPSD? CMOS?

Analog Devices Inc. (ADI) has announced a single-chip wideband IF receiver subsystem that enables designers of high-performance communications and instrumentation equipment to cut the complexity of their receiver designs while improving frequency planning flexibility and instantaneous dynamic range. The AD6676 can be configured to achieve a noise figure of 13dB, IIP3=36dBM, noise spectral density (NSD) as low as -160dBFS/Hz.

The enabling technology behind the performance of the AD6676 is a highly programmable continuous-time bandpass sigma delta ADC (CTBPSD) topology that combines highly programmable analogue filtering functionality with high dynamic range conversion. The implementation in deep sub-micron CMOS allows the advantages of oversampling by providing digitised bandwidth of up to 160MHz. This provides a combination of features that enables "reconfigurable radio" architectures for high-performance heterodyne systems.


The AD6676 can be configured for IF frequencies from 70-450MHz, IF bandwidths from 20-160MHz and input full scales from -14dBm to 10dBm. A unique profile feature allows the AD6676 to switch between up to four different IF and bandwidth configurations within 1ms. It features the CTBPSD architecture that removes the need for IF SAW filters and gain blocks, significantly simplifying the interface to an RF mixer. The input provides a programmable digital attenuator, allowing gain control functionality with an easy-to-drive resistive interface. The AD6676 also includes a fully integrated clock synthesiser, digital down converter and JESD204B serial interface. The net result is a receiver solution offering up to 70 per cent board space savings, noted ADI.

ADI is also providing a comprehensive set of tools to ease adoption of this advanced technology. In addition to datasheets, evaluation boards and online technical support, ADI has created a live remote hardware drive capability that allows customers to run experiments on the AD6676 in real time.

The AD6676BCBZRL operates from -40°C to 85°C and comes in WLCSP packaging for $145 each per 1,000 units. The AD6676EBZ evaluation board can be had for $395 each. The HSC-ADC-EVALEZ data capture kit is available for $750 each.

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