Description
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90 dB Spurious Free Dynamic Range Continuous Frequency Update On-Board Data Ready Signal APPLICATIONS Frequency Synthesizers DDS Tuning Digital Demodulation FM Modulators
GENERAL DESCRIPTION The AD99SS is a 100 MHz direct digital synthesizer for frequency synthesis applications. It comprises a 32-bit phase accumulator and a IS-bit phase-to-12-bit sine amplitude converter. The control logic is CMOS compatible, and the clock input is TTL. CMOS outputs are latched on board, and a data ready signal is provided. Designed for applications in communications, instrumentation, and military systems, the AD99SS can be combined with a clock reference and a DAC such as the AD97l3B or AD9721 to form a digitally-controlled analog frequency reference. The AD99SS is available in an SO-leadplastic quad flatpack (PQFP) for commercial (O°Cto + 70°C) temperature range applications. Contact the factory for information concerning the availability of a military temperature range device.
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