AD9851 180 MHz完整DDS频率合成器

AD9851: 180 MHz完整DDS频率合成器

AD9851是一款高度集成的器件，采用先进的DDS技术，内置一个高速、高性能数模转换器和比较器，共同构成数字可编程频率合成器和时钟发生器。以精密时钟源作为基准时，AD9851能产生一个频率稳定、相位可编程的数字化模拟输出正弦波。该正弦波可以直接用作频率源，或在内部转换为适合捷变时钟发生器应用的方波。

AD9851的创新型高速DDS内核提供一个32位频率调谐字；对于180 MHz基准时钟，输出调谐分辨率可以达到0.040 Hz。AD9851内置独特的X6基准时钟乘法器电路，无需高速参考振荡器。该6X PLL乘法器对无杂散动态范围(SFDR)和相位噪声特性的影响极小。该器件还提供5位数字控制相位调制，使其输出能够以180°、90°、45°、22.5°、11.25°及其任意组合的增量发生相移。

The AD9851 is a highly integrated device that uses advanced DDS technology, coupled with an internal high-speed, high performance D/A converter, and comparator, to form a digitally-programmable frequency synthesizer and clock generator function. When referenced to an accurate clock source, the AD9851 generates a stable frequency and phase-programmable digitized analog output sinewave. This sinewave can be used directly as a frequency source, or internally converted to a square wave for agile-clock generator applications.The AD9851's innovative high-speed DDS core provides a 32-bit frequency tuning word, which results in an output tuning resolution of 40 milli-Hertz, for a 180 MHz reference clock. The AD9851 contains a unique X6 reference clock multiplier circuit that obviates the need for a high-speed reference oscillator. The 6X PLL multiplier has minimal impact on SFDR and phase noise characteristics. The device provides 5-bits of digitally-controlled phase modulation which enables phase shifting of its output in increments of 180°, 90°, 45°, 22.5°, 11.25°, and any combination thereof.

技术特性

180 MHz时钟速率，具有可选6x基准时钟乘法器
片内高性能10位DAC和具迟滞特性的高速比较器
SFDR >43 dB (70 MHz AOUT)
32位频率调谐字
简化的控制接口：并行或串行异步加载格式
5位相位调制与偏移能力
比较器抖动：小于80 ps 峰峰值 (20 MHz)
2.7 V至5.25 V单电源供电
低功耗：555 mW (180 MHz)
省电功能：4 mW (2.7 V)
超小型28引脚SSOP封装

180 MHz Clock Rate with Selectable 6x Reference Clock Multiplier
On-Chip High Performance 10-Bit DAC and High Speed Comparator with Hysteresis
SFDR >43 dB @ 70 MHz AOUT
32-Bit Frequency Tuning Word
Simplified Control Interface: Parallel or Serial Asynchronous Loading Format
5-Bit Phase Modulation and Offset Capability
Comparator Jitter <80 ps p-p @ 20 MHz
2.7 V to 5.25 V Single-Supply Operation
Low Power: 555 mW @ 180 MHz
Power-Down Function, 4 mW @ 2.7V
Ultrasmall 28-Lead SSOP Packaging

技术指标

Master fclk : 180MHz
Resolution (Bits): 10bit
Tuning Word Width (bits): 32bit
I/O Interface: Parallel,Serial
REFCLK Multiplier: Yes
Compliance Range (V): 1.5V
FS Iout (mA nom): 20mA

功能框图

订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
AD9851BRS 产品状态: 量产	28 ld SSOP	28	商业	Tube, 47	$ 18.65	$ 15.67	N 材料信息
AD9851BRSRL 产品状态: 量产	28 ld SSOP	28	商业	Reel, 1500	$ 0.00	$ 15.67	N 材料信息
AD9851BRSZ 产品状态: 量产	28 ld SSOP	28	商业	Tube, 47	$ 16.14	$ 13.56	Y 材料信息
AD9851BRSZRL 产品状态: 量产	28 ld SSOP	28	商业	Reel, 1500	$ 0.00	$ 13.56	Y 材料信息