AD9838 11 mW功耗、2.3 V至5.5 V的完整DDS

AD9838: 11 mW功耗、2.3 V至5.5 V的完整DDS

AD9838 功能框图 AD9838是一款低功耗DDS器件，能够产生高性能正弦波和三角波输出。其片内还集成一个比较器，支持产生方波以用于时钟发生。当供电电压为2.3 V时，其功耗仅为11 mW，非常适合对功耗敏感的应用。AD9838提供相位调制和频率调制功能。频率寄存器为28位；时钟速率为16 MHz时，可以实现0.06 Hz的分辨率；而时钟速率为5 MHz时，则可以实现0.02 Hz的分辨率。配置频率和相位调制的方法是通过串行接口加载寄存器，然后通过软件或FSELECT/PSELECT引脚切换寄存器。AD9838通过一个3线串行接口写入数据。该串行接口能够以最高40 MHz的时钟速率工作，并且与DSP和微控制器标准兼容。该器件采用2.3 V至5.5 V电源供电。模拟和数字部分彼此独立，可以采用不同的电源供电；例如，AVDD可以是5 V，而DVDD可以是3 V。AD9838具有关断引脚(SLEEP)，支持从外部控制关断模式。器件中不用的部分可以关断，以将功耗降至最低。例如，在产生时钟输出时，可以关断DAC。AD9838采用20引脚LFCSP_WQ封装。

The AD9838 is a low power programmable waveform generator capable of producing sine, triangular, and square wave outputs. Waveform generation is required in various types of sensing, actuation, and time domain reflectometry applications. The output frequency and phase are software programmable, allowing easy tuning. No external components are needed. The frequency registers are 28 bits; with a 25 MHz clock rate, resolution of 0.1 Hz can be achieved. Similarly, with a 1 MHz clock rate, the AD9838 can be tuned to 0.004 Hz resolution.The AD9838 is written to via a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards. The device operates with a power supply from 2.3 V to 5.5 V.The AD9838 has a power-down function (SLEEP). This allows sections of the device that are not being used to be powered down, thus minimizing the current consumption of the part, e.g., the DAC can be powered down when a clock output is being generated.The AD9838 is available in a 10-lead MSOP package.

技术特性

电源电压范围：2.3 V至5.5 V
MCLK速率：16 MHz（B级），5 MHz（A级）
输出频率高达8 MHz
正弦波/三角波/方波输出
片上集成比较器
3线SPI接口
扩展温度范围：−40°C至+125°C
关断选项
当供电电压为2.3 V时，功耗为11 mW
20引脚LFCSP封装
Digitally Programmable Frequency and Phase
20 mW Power Consumption at 3 V
0 MHz to 12.5 MHz Output Frequency Range
28-Bit Resolution (0.1 Hz @ 25 MHz Ref Clock)
Sinusoidal/Triangular/Square Wave Outputs
2.3 V to 5.5 V Power Supply
No External Components Required
3-Wire SPI® Interface
Extended Temperature Range: –40°C to +105°C
Power-Down Option
10-Lead MSOP Package

应用领域

频率激励/波形发生
频率相位调谐和调制
低功耗RF/通信系统
液体和气流测量
传感器应用：接近度、运动和缺陷检测
测试与医疗设备
Frequency Stimulus/Waveform Generation
Liquid and Gas Flow Measurement
Sensory Applications–Proximity, Motion, and Defect Detection
Line Loss/Attenuation
Test and Medical Equipment
Sweep/Clock Generators
TDR

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
AD9838ACPZ-RL 产品状态: 量产	20 ld LFCSP 4x4mm (2.5EP	20	工业	Reel, 5000	-	$ 2.10	Y 材料信息
AD9838BCPZ-RL 产品状态: 量产	20 ld LFCSP 4x4mm (2.5EP	20	工业	Reel, 5000	-	$ 2.28	Y 材料信息
AD9838BCPZ-RL7 产品状态: 量产	20 ld LFCSP 4x4mm (2.5EP	20	工业	Reel, 1500	-	$ 2.28	Y 材料信息

开发工具

产品型号	描述	报价	RoHS
EVAL-AD9838SDZ 产品状态: 量产	Evaluation Board	$ 59.00	是