一、产品概述
DS855是一种高速相位调制直接数字合成器(DDS)。频率字位32-bit，11-bit相位调制输入和11-bit幅度分辨率。
DS855 is a high-speed Direct Digital Synthesizer (DDS) with a 32-bit frequency tuning resolution, 11-bit phase modulation inputs and an amplitude resolution of 11 bits. Sine waves in the 1st Nyquist band can be generated up to near 1.2 GHz (at a 2.5-GHz clock rate). The initial phase can be reset to zero degrees of Sine wave to start with. The chip has a pair of complementary outputs with 50-Ω back terminations. The frequency of output waveforms can be controlled by thirty-two frequency control bits, Vi_0 ~ Vi_31. The phase of output waveforms can be modulated by the 11-bit Pi_0 ~ Pi_10 phase modulation inputs. The DS855 accepts either complementary clock inputs or a single-ended clock input and features 50-Ω on-chip back terminations with user-defined threshold. The frequency resolution bits accept TTL or CMOS input levels. Only a single –5V power supply is required.
二、性能参数
1、32-bit frequency tuning word & 13-bit phase resolution
2、 On chip DAC with 11 bit resolution
3、11-bit phase modulation port
4、Clock rate up to 2.2 GHz with sine wave generation up to 1.2 GHz
5、Complementary analog waveform outputs with 50 Ω back terminations
6、Worst SFDR > 50 dBc
7、Reset pin to initiate phase 0 starting state
8、 High speed strobe to update the frequency word and DAC output frequency
9、High speed strobe inputs to be controlled by micro-controller or DSP chips for real time chirping
10、Frequency update rate as fast as 8 clock cycles
11、3.2 W power consumption with a single -5.0V power supply
三、典型应用
1、Radar design and testing 雷达设计和测试
2、Satellite communications 卫星通信
3、Electronic warfare 电子战
4、Wireless basestations 无线基站
5、RF signal source generation 射频信号源的产生
6、Instrumentation and semiconductor testers 仪器和半导体测试
7、Advanced communication modulations 高级通信调节
8、VSAT
四、产品功能图
五、Euvis其他DDS型号
DS852 DS856 DS855 DS875 DS875A DS872
六、订购需知
DS855，15+，原厂常备现货，订货周期1-2周
以上报价为参考价，具体数量的价格和交期，请联系我。
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