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AD9854/PCB 数据表(PDF) 1 Page - Analog Devices |
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AD9854/PCB 数据表(HTML) 1 Page - Analog Devices |
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1 / 44 page  REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD9854 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 CMOS 300 MHz Quadrature Complete-DDS FUNCTIONAL BLOCK DIAGRAM AD9854 DIGITAL MULTIPLIERS SYSTEM CLOCK 12-BIT CONTROL DAC DATA DAC RSET PHASE/OFFSET MODULATION INV. SINC FILTER 14-BIT PHASE OFFSET/ MODULATION 48-BIT FREQUENCY TUNING WORD FREQUENCY TUNING WORD/PHASE WORD MULTIPLEXER AND RAMP START STOP LOGIC PROGRAMMABLE RATE AND UPDATE CLOCKS COMPARATOR PROGRAMMING REGISTERS 4 –20 REF CLK MULTI- PLEXER DIFF/SINGLE SELECT REFERENCE CLOCK IN FSK/BPSK/HOLD DATA IN BIDIRECTIONAL I/O UPDATE READ WRITE SERIAL/PARALLEL SELECT 6-BIT ADDRESS OR SERIAL PROGRAMMING LINES 8-BIT PARALLEL LOAD MASTER RESET +VS GND CLOCK OUT ANALOG IN SHAPED ON/OFF KEYING ANALOG OUT ANALOG OUT 300MHz DDS I/O PORT BUFFERS 12-BIT AM MOD RAMP-UP/-DOWN CLOCK/LOGIC AND MULTIPLEXER I Q INV. SINC FILTER 12-BIT "Q" OR CONTROL DAC MUX 12-BIT "I" DAC FEATURES 300 MHz Internal Clock Rate Integrated 12-Bit Output DAC Ultrahigh-Speed, 3 ps RMS Jitter Comparator Excellent Dynamic Performance: 80 dB SFDR @ 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 Amplitude Modulation and Programmable Shaped On/Off Keying Function Single Pin FSK and PSK Data 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 or 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 Packaging APPLICATIONS Agile, Quadrature L.O. Frequency Synthesis Programmable Clock Generator FM Chirp Source for Radar and Scanning Systems Test and Measurement Equipment Commercial and Amateur RF Exciter GENERAL DESCRIPTION The AD9854 digital synthesizer is a highly integrated device that uses advanced DDS technology, coupled with two internal high-speed, high-performance quadrature D/A converters and a comparator 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 L.O. in communications, radar, and many other applications. The AD9854’s innovative high-speed DDS core provides 48-bit frequency resolution (1 microHertz tuning steps). Phase trunca- tion to 17 bits assures excellent SFDR. The AD9854’s circuit (continued on page 14) |
类似零件编号 - AD9854/PCB |
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类似说明 - AD9854/PCB |
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