The AD9862 integrates four high-performance data converters on a mixed-signal front-end chip for broadband applications. The chip consists of two high-speed 12-bit analog-to-digital converters and two 14-bit 128-Msample/second digital-to-analog converters, along with communications-specific digital processing. The device is part of Analog Devices' Mixed-Signal Front-End family of ICs, which partition the signal path according to performance, rather than along analog-digital boundaries. The transmit path accepts a variety of data formats and includes dual-programmable gain amplifiers, 2x or 4x interpolation filters, a digital Hilbert filter and digital mixers. The receive path can accept diversity or I&Q data at baseband or low IF and has input buffers, programmable-gain amplifiers and decimation filters. Programmable delay-locked loop circuits are also included. Sampling now, the device comes in a 128-lead LQFP and is priced at $15.50 each per 100,000.
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