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AD9912

Part Number	AD9912
Manufacturer	Analog Devices
Description	1-GSPS Direct Digital Synthesizer
Published	Jun 18, 2007
Detailed Description	Data Sheet AD9912 1 GSPS Direct Digital Synthesizer with 14-Bit DAC FEATURES ► 1 GSPS internal clock speed (up to 400 M...
Datasheet	AD9912 PDF File

Overview

Data Sheet AD9912 1 GSPS Direct Digital Synthesizer with 14-Bit DAC FEATURES ► 1 GSPS internal clock speed (up to 400 MHz output directly) ► Integrated 1 GSPS 14-bit DAC ► 48-bit frequency tuning word with 4 µHz resolution ► Differential HSTL comparator ► Flexible system clock input accepts either crystal or external reference clock ► On-chip low noise PLL REFCLK multiplier ► 2 SpurKiller channels ► Low jitter clock doubler for frequencies up to 750 MHz ► Single-ended CMOS comparator; frequencies of <150 MHz ► Programmable output divider for CMOS output ► Serial I/O control ► Excellent dynamic performance ► Software controlled power-down ► Available in two 64-lead LFCSP packages ► Residual phase noise @ 250 MHz ► 10 Hz offset: −113 dBc/Hz ► 1 kHz offset: −133 dBc/Hz ► 100 kHz offset: −153 dBc/Hz ► 40 MHz offset: −161 dBc/Hz BASIC BLOCK DIAGRAM APPLICATIONS ► Agile LO frequency synthesis ► Low jitter, fine tune clock generation ► Test and measurement equipment ► Wireless base stations and controllers ► Secure communications ► Fast frequency hopping GENERAL DESCRIPTION The AD9912 is a direct digital synthesizer (DDS) that features an integrated 14-bit digital-to-analog converter (DAC).
The AD9912 features a 48-bit frequency tuning word (FTW) that can synthesize frequencies in step sizes no larger than 4 μHz.
Absolute frequency accuracy can be achieved by adjusting the DAC system clock.
The AD9912 also features an integrated system clock phase-locked loop (PLL) that allows for system clock inputs as low as 25 MHz.
The AD9912 operates over an industrial temperature range, spanning −40°C to +85°C.
Figure 1.
Rev.
G DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is".
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 result from its use.
Specifications subject to change without notice.
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