AD9859/PCBZ Analog Devices

400 MSPS, 10-Bit, 1.8 V CMOS Direct Digital Synthesizer AD9859 FEATURES APPLICATIONS 400 MSPS internal clock speed Agile LO frequency synthesis Integrated 10-bit DAC Programmable clock generators 32-bit tuning word Test and measurement equipment Phase noise 120 dBc/Hz 1 kHz offset (DAC output) Commercial and amateur radio exciter Excellent dynamic performance GENERAL DESCRIPTION >75 dB SFDR 160 MHz (100 kHz offset) A OUT The AD9859 is a direct digital synthesizer (DDS) featuring a Serial I/O control 10-bit DAC operating at up to 400 MSPS. The AD9859 uses 1.8 V power supply advanced DDS technology, coupled with an internal high speed, Software and hardware controlled power-down high performance DAC to form a digitally programmable, 48-lead TQFP/EP package complete high frequency synthesizer capable of generating a Support for 5 V input levels on most digital inputs frequency-agile analog output sinusoidal waveform at up to PLL REFCLK multiplier (4 to 20) 200 MHz. The AD9859 is designed to provide fast frequency Internal oscillator can be driven by a single crystal hopping and fine tuning resolution (32-bit frequency tuning Phase modulation capability word). The frequency tuning and control words are loaded into Multichip synchronization the AD9859 via a serial I/O port. The AD9859 is specified to operate over the extended industrial temperature range of 40C to +105C FUNCTIONAL BLOCK DIAGRAM DDS CORE AD9859 PHASE ACCUMULATOR PHASE DAC R SET OFFSET 1 Z 32 19 10 IOUT COS(X) DAC IOUT 14 SYSTEM CLOCK 10 1 Z 32 SYNC IN 14 OSK TIMING AND CONTROL LOGIC I/O UPDATE PWRDWNCTL 0 M SYNC CLK U SYNC CONTROL REGISTERS 4 X OSCILLATOR/BUFFER M SYSTEM U 420 CLOCK REFCLK X CLOCK REFCLK MULTIPLIER ENABLE CRYSTAL OUT I/O PORT RESET Figure 1. Rev. A 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 20042009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. FREQUENCY TUNING WORD DDS CLOCK PHASE ACUMULATOR RESET AMPLITUDE SCALE FACTOR 03375-0-001AD9859 TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 11 Applications ....................................................................................... 1 Component Blocks ..................................................................... 11 General Description ......................................................................... 1 Modes of Operation ................................................................... 16 Functional Block Diagram .............................................................. 1 Programming AD9859 Features .............................................. 16 Revision History ............................................................................... 2 Serial Port Operation ................................................................. 19 AD9859Electrical Specifications ................................................ 3 Instruction Byte .......................................................................... 21 Absolute Maximum Ratings ............................................................ 5 Serial Interface Port Pin Description ....................................... 21 ESD Caution .................................................................................. 5 MSB/LSB Transfers .................................................................... 21 Pin Configuration ............................................................................. 6 Suggested Application Circuits ..................................................... 23 Pin Function Descriptions .............................................................. 7 Outline Dimensions ....................................................................... 24 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 24 REVISION HISTORY 5/09Rev. 0 to Rev. A Changes to Absolute Maximum Ratings Section ......................... 5 Changes to Table 3 ............................................................................ 7 Changes to Table 5 .......................................................................... 13 Changes to Figure 19 ...................................................................... 18 Changes to Figure 20 ...................................................................... 19 Changes to Serial Port Operation ................................................. 19 Changes to Serial Interface Port Pin Description Section ........ 21 Changes to Figure 27 ...................................................................... 23 Updated Outline Dimensions ....................................................... 24 Changes to Ordering Guide .......................................................... 24 1/04Revision 0: Initial Version Rev. A Page 2 of 24