AD9852 CMOS 300 MSPS完整DDS

AD9852: CMOS 300 MSPS完整DDS

AD9852 功能框图 AD9852数字频率合成器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，共同构成一个数字可编程、捷变频率合成器。以精密时钟源作为基准时，AD9852能产生一个高度稳定的频率、相位和振幅可编程余弦输出，可用作通信、雷达和其它许多应用中的捷变LO。创新型高速DDS内核可提供48位频率分辨率（使用300 MHz SYSCLK时，调谐分辨率为1 μHz）。保持17位可确保该器件具有出色的无杂散动态范围(SFDR)。AD9852的电路架构允许产生频率最高达150 MHz的输出信号，该输出信号能以最高每秒1亿新频率的速率进行数字式调谐。内部比较器可以将（经过外部滤波的）余弦波输出转换为方波，用于捷变时钟发生器应用。该器件提供两个14位相位寄存器和一个单引脚用于BPSK操作。针对更高阶PSK操作，利用I/O接口可以实现相位变化。12位余弦DAC与创新的DDS架构配合，可提供出色的宽带和窄带输出无杂散动态范围(SFDR)。若配置比较器，12位控制DAC还有助于在高速时钟发生器应用中控制静态占空比。

12位数字乘法器可以对余弦DAC输出进行可编程振幅调制、开关输出形键控和精密振幅控制。该器件还具有线性调频(Chirp)功能，适合宽带宽扫频应用。AD9852的可编程4×至20× REFCLK乘法器电路，可以利用频率较低的外部基准时钟在内部产生300 MHz系统时钟，这样可以为用户实现300 MHz系统时钟源节省费用、解决困难。单端或差分输入也能直接处理300 MHz时钟速率。该器件支持单引脚、传统FSK和频谱质量增强的频率渐变FSK。AD9852利用先进的0.35 μm CMOS技术，提供这一高水平功能，并采用3.3 V单电源供电。AD9852与单音频率合成器AD9854引脚兼容，额定温度范围为−40°C至+85°C扩展工业温度范围。

The AD9852 digital synthesizer is a highly integrated device that uses advanced DDS technology, coupled with an internal high speed, high performance D/A converter to form a digitally programmable, agile synthesizer function. When referenced to an accurate clock source, the AD9852 generates a highly stable frequency-, phase-, and amplitude-programmable cosine output that can be used as an agile LO in communications, radar, and many other applications. The innovative high speed DDS core of the AD9852 provides 48-bit frequency resolution (1 μHz tuning resolution with 300 MHz SYSCLK). Maintaining 17 bits ensures excellent SFDR.

The circuit architecture of the AD9852 allows the generation of output signals at frequencies up to 150 MHz, which can be digitally tuned at a rate of up to 100 million new frequencies per second. The (externally filtered) cosine wave output can be converted to a square wave by the internal comparator for agile clock generator applications. The device provides two 14-bit phase registers and a single pin for BPSK operation.For higher-order PSK operation, the I/O interface can be used for phase changes. The 12-bit cosine DAC, coupled with the innovative DDS architecture, provides excellent wideband and narrow-band output SFDR. When configured with the comparator, the 12-bit control DAC facilitates static duty cycle control in the high speed clock generator applications.

The 12-bit digital multiplier permits programmable amplitude modulation, on/off output shaped keying, and precise amplitude control of the cosine DAC output. Chirp functionality is also included for wide bandwidth frequency sweeping applications. The AD9852 programmable 4× to 20× REFCLK multiplier circuit internally generates the 300 MHz system clock from a lower frequency external reference clock. This saves the user the expense and difficulty of implementing a 300 MHz system clock source.Direct 300 MHz clocking is also accommodated with either single-ended or differential inputs. Single-pin, conventional FSK and the enhanced spectral qualities of ramped FSK are supported. The AD9852 uses advanced 0.35 μ CMOS technology to provide this high level of functionality on a single 3.3 V supply.The AD9852 is pin-for-pin compatible with the AD9854 single-tone synthesizer. The AD9852 is specified to operate over the extended industrial temperature range of −40°C to +85°C.

技术特性

300 MHz内部时钟速率
FSK、BPSK、PSK、线性调频、AM操作
两个集成式12位数模转换器
超高速比较器，均方根抖动：3 ps
出色的动态性能：80 dB SFDR (100 MHz ± 1 MHz AOUT)
4×至20×可编程基准时钟乘法器
两个48位可编程频率寄存器
两个14位可编程相位偏移寄存器
12位可编程振幅调制和开关输出形键控功能
单引脚FSK和BPSK数据接口
通过I/O接口提供PSK功能
线性或非线性FM线性调频功能，具有单引脚频率保持功能

300 MHz internal clock rate
FSK, BPSK, PSK, chirp, AM operation
Dual integrated 12-bit D/A converters
Ultrahigh speed comparator, 3 ps rms jitter
Excellent dynamic performance 80 dB SFDR at 100 MHz (±1 MHz) AOUT
4× to 20× programmable reference clock multiplier
Dual 48-bit programmable frequency registers
Dual 14-bit programmable phase offset registers
12-bit programmable amplitude modulation and on/off output shaped keying function
Single-pin FSK and BPSK data interfaces
PSK capability via I/O interface
Linear or nonlinear FM chirp functions with single pin frequency hold function

应用领域

LO捷变频
可编程时钟发生器
雷达和扫描系统的FM线性调频源
测试与测量设备
商用与业余RF激励器
Agile LO frequency synthesis
Programmable clock generator
FM chirp source for radar and scanning systems
Test and measurement equipment
Commercial and amateur RF exciter

技术指标

Master fclk : 300MHz
Resolution (Bits): 12bit
Tuning Word Width (bits): 48bit
I/O Interface: Parallel,Serial
REFCLK Multiplier: Yes
Compliance Range (V): 1V
FS Iout (mA nom): 20mA

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
AD9852AST 产品状态: 停产	80 ld LQFP (14x14mm)	80	工业	Tray, 90	$ 0.00	$ 0.00	N 材料信息
AD9852ASTZ 产品状态: 量产	80 ld LQFP (14x14mm)	80	工业	Tray, 90	$ 18.17	$ 15.58	Y 材料信息
AD9852ASVZ 产品状态: 量产	80 ld TQFP-EP (14x14mm w/9.5mm EP)	80	工业	Tray, 90	$ 25.30	$ 22.77	Y 材料信息

开发工具

产品型号	描述	报价	RoHS
AD9852/PCBZ 产品状态: 量产	Evaluation Board	$ 400.00	是