AD9951

Data Sheet 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesize AD9951 FEATURES APPLICATIONS 400 MSPS internal clock speed Integrated 14-bit digital-to-analog converter (DAC) 32-bit tuning word Phase noise ≤ −120 dBc/Hz at 1 kHz offset (DAC output) Excellent dynamic performance >80 dB SFDR at 160 MHz (±100 kHz offset) AOUT Serial input/output (I/O) control 1.8 V power supply Software and hardware controlled power down 48-lead TQFP/EP package Phase-locked loop (PLL) REFCLK multiplier (4× to 20×) Internal oscillator; can be driven by a single crystal Phase modulation capability Multichip synchronization Agile local oscillator (LO) frequency synthesis Programmable clock generators Test and measurement equipment Acousto-optic device drivers FUNCTIONAL BLOCK DIAGRAM DDS CORE PHASE ACCUMULATOR Z–1 32 PHASE OFFSET 19 COS(X) AD9951 14 DAC 14 SYSTEM CLOCK Z–1 DAC_RSET IOUT IOUT 32 14 SYNC_IN I/O UPDATE SYNC_CLK REFCLK REFCLK 0 M U X SYNC OSCILLATOR/BUFFER ENABLE 4× TO 20× CLOCK MULTIPLIER TIMING AND CONTROL LOGIC ÷4 CONTROL REGISTERS M U X SYSTEM CLOCK OSK PWRDWNCTL FREQUENCY TUNING WORD DDS CLOCK CLEAR PHASE ACCUMULATOR AMPLITUDE SCALE FACTOR 03359-001 CRYSTAL OUT I/O PORT Figure 1. RESET Rev. D Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may resu...