GENERAL DESCRIPTION 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). Maintaining 17 bits ensures excellent SFDR. FEATURES 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 Linear or nonlinear FM chirp functions with single pin frequency hold function Frequency ramped FSK <25 ps rms total jitter in clock generator mode Automatic bidirectional frequency sweeping Sin(x)/x correction Simplified control interface 10 MHz serial 2-wire or 3-wire SPI-compatible 100 MHz parallel 8-bit programming 3.3 V single supply Multiple power-down functions Single-ended or differential input reference clock Small, 80-lead LQFP or TQFP with exposed pad 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
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