AD9959屬于集成電路（IC）的直接數(shù)字合成（DDS）。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD9959直接數(shù)字合成（DDS）直接數(shù)字合成 (DDS) 用于由數(shù)字信號生成不同頻率的模擬波形。在必須大范圍掃描的無線系統(tǒng)中可用于頻率控制。主時鐘頻率有 5MHz、16MHz、16.776MHz、25MHz、50MHz、75MHz、125MHz、180MHz、200MHz、250MHz、300MHz、400MHz、500MHz、1GHz、2.5GHz 和 3GHz，分辨率為 10 b、12 b 或 14 b。

PRODUCT OVERVIEW

The AD9959 consists of four independently programmable DDS channels. The AD9959 features independent frequency, phase, and amplitude control of each channel; this allows for the correction of imbalances due to analog processing such as filtering, amplification, or PCB layout related mismatches. The AD9959 supports frequency sweeping for radar and instrumentation applications. Since all four channels share a common system clock, they are inherently synchronized. If more than four channels are required, synchronizing multiple AD9959s is a simple task.

FEATURES

Four synchronized DDS channels @500 MSPS

Independent frequency / phase / amplitude control between all channels

Matched latencies for Freq, Phase, and Amplitude changes

Excellent channel to channel isolation

Frequency sweeping capability

Up to 16 levels of modulation (pin selectable)

Individually programmable DAC full scale currents

Four integrated 10-bit D/A converters(DACs)

32-bit frequency tuning resolution

14-bit phase offset resolution

10-bit output amplitude scaling resolution

Serial I/O Port(SPI) with enhanced data throughput

Software/Hardware controlled power-down

Dual supply operation (1.8 V DDS core / 3.3 V serial I/O)

Built-in synchronization for multiple devices

Selectable REF_CLK multipier(PLL) 4x to 20x (bypassable)

Selectable REF_CLK crystal operation

56 pin LFCSP package

APPLICATIONS

Agile L.O. frequency synthesis

Phased array radar / sonar

Instrumentation

Synchronized clocking

RF source for AOTF