ADI AD9854AST

The AD9854 digital synthesizer is a highly integrated device that uses advanced DDS technology, coupled with two internal high speed, high performance quadrature DACs to form a digitally programmable I and Q synthesizer function. When referenced to an accurate clock source, the AD9854 generates highly stable, frequency-phase, amplitude-programmable sine and cosine outputs that can be used as an agile LO in communications, radar, and many other applications. The innovative high speed DDS core of the AD9854 provides 48-bit frequency resolution (Δ¹ μHz) tuning res

• 300 MHz internal clock rate
• FSK, BPSK, PSK, chirp, AM operation
• Dual integrated 12-bit digital-to-analog converters (DACs)
• 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 input/output 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 interfaces 10 MHz serial 2- 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

• Agile, quadrature LO frequency synthesis
• Programmable clock generators
• FM chirp source for radar and scanning systems
• Test and measurement equipment
• Commercial and amateur RF exciters