The AD6676 from Analog Devices is a single-chip, wideband IF receiver subsystem which allows designers of high-performance communications and instrumentation equipment to reduce the complexity of their receiver designs while simultaneously achieving frequency planning flexibility and high instantaneous dynamic range.
The enabling technology behind this performance is a highly programmable continuous-time bandpass sigma delta A/D converter (CTBPSD) topology which combines highly programmable analog 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 160 MHz. This provides a combination of features that enables reconfigurable radio architectures for high-performance heterodyne systems.
The chip can be configured to achieve a noise figure of 13 dB, IIP3 of 36 dBM and noise spectral density (NSD) as low as -160 dBFS/Hz. It supports IF frequencies from 70 MHz up to 450 MHz, IF bandwidths from 20 MHz up to 160 MHz and input full scales from -14 dBm to +10 dBm. A unique profile feature allows the AD6676 to switch between up to four different IF and bandwidth configurations within 1 microsecond.
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