The AD9852 digital synthesizer is a highly integrated device that uses advanced DDS technology, coupled with an internal high speed, high performance D/A converter to form a digitally programmable, agile synthesizer function. When referenced to an accurate clock source, the AD9852 generates a highly stable frequency-, phase-, and amplitude-programmable cosine output that can be used as an agile LO in communications, radar, and many other applications. The innovative high speed DDS core of the AD9852 provides 48-bit frequency resolution (1 μHz tuning resolution with 300 MHz SYSCLK). Retaining 16 bits for phase-to-amplitude conversion ensures excellent spurious-free dynamic range (SFDR). The circuit architecture of the AD9852 allows the generation of output signals at frequencies up to 150 MHz, which can be digitally tuned at a rate of up to 100 million new frequencies per second. The (externally filtered) cosine wave output can be converted to a square wave by the internal comparator for agile clock generator applications. The device provides two 14-bit phase registers and a single pin for BPSK operation. For higher-order PSK operation, the I/O interface can be used for phase changes. The 12-bit cosine DAC, coupled with the innovative DDS architecture, provides excellent wideband and narrow-band output SFDR. When configured with the comparator, the 12-bit control DAC facilitates static duty cycle control in the high speed clock generator applications. The 12-bit digital multiplier permits programmable amplitude modulation, on/off output shaped keying, and precise amplitude control of the cosine DAC output. Chirp functionality is also included for wide bandwidth frequency sweeping applications. The AD9852 programmable 4× to 20× REFCLK multiplier circuit internally generates the 300 MHz system clock from a lower frequency external reference clock. This saves the user the expense and difficulty of implementing a 300 MHz system clock source. Direct 300 MHz clocking is also accommodated with either single-ended or differential inputs. Single-pin, conventional FSK and the enhanced spectral qualities of ramped FSK are supported. The AD9852 uses advanced 0.35 μ CMOS technology to provide this high level of functionality on a single 3.3 V supply. The AD9852 is pin-for-pin compatible with the AD9854 single-tone synthesizer. The AD9852 is specified to operate over the extended industrial temperature range of −40°C to +85°C. Applications * Agile LO frequency synthesis * Programmable clock generator * FM chirp source for radar and scanning systems * Test and measurement equipment * Commercial and amateur RF exciter * 300 MHz internal clock rate * FSK, BPSK, PSK, chirp, AM operation * Dual integrated 12-bit D/A converters * Ultrahigh speed comparator, 3 ps rms jitter * Excellent dynamic performance * 80 dB SFDR at 100 MHz (±1 MHz) AOUT * 4× to 20× programmable reference clock multiplier * Dual 48-bit programmable frequency registers * Dual 14-bit programmable phase offset registers * 12-bit programmable amplitude modulation and on/off output shaped keying function * Single-pin FSK and BPSK data interfaces * PSK capability via I/O interface https://elecena.pl/product/17774850/cmos-300-msps-complete-dds 2021-04-17 https://elecena.pl/product/17774850/cmos-300-msps-complete-dds 2025-01-17