AD9834 20 mW功耗、2.3 V至5.5 V、75 MHz完整DDS

AD9834: 20 mW功耗、2.3 V至5.5 V、75 MHz完整DDS

AD9834 功能框图 AD9834是一款75 MHz、低功耗直接数字频率合成器(DDS)，能产生高性能正弦波和三角波输出。它还具有一个片内比较器，可以提供用于产生时钟的方波。该器件在3 V时的功耗仅为20 mW，非常适合对功耗敏感的应用。同时还提供相位调制和频率调制能力。频率寄存器为28位；当时钟速率为75 MHz时，可以实现0.28 Hz的分辨率。同样，当时钟速率为1 MHz时，可以实现0.004 Hz的调谐分辨率。通过串行接口加载寄存器，利用软件或FSELECT引脚与PSELECT引脚切换寄存器，可分别实现频率和相位调制。AD9834通过一个三线式串行接口写入数据。该串行接口能够以最高40 MHz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。模拟与数字部分各自独立，可以采用不同电源供电，例如：AVDD可以为5 V，而DVDD为3 V。AD9834具有一个省电引脚(SLEEP)，通过该引脚可以从外部控制省电模式。当该器件的某些部分不在使用时，可以关断这部分，从而将功耗降至最低。例如，在产生时钟输出时可以关断DAC。该器件采用20引脚TSSOP封装。

The AD9834 is a 75 MHz low power DDS device capable of producing high performance sine and triangular outputs. It also has an on-board comparator that allows a square wave to be produced for clock generation. Consuming only 20 mW of power at 3 V makes the AD9834 an ideal candidate for power-sensitive applications.

Capability for phase modulation and frequency modulation is provided. The frequency registers are 28 bits; with a 75 MHz clock rate, resolution of 0.28 Hz can be achieved. Similarly, with a 1 MHz clock rate, the AD9834 can be tuned to 0.004 Hz resolution. Frequency and phase modulation are affected by loading registers through the serial interface and toggling the registers using software or the FSELECT pin and PSELECT pin, respectively.The AD9834 is written to using 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 analog and digital sections are independent and can be run from different power supplies, for example, AVDD can equal 5 V with DVDD equal to 3 V.The AD9834 has a power-down pin (SLEEP) that allows external control of the power-down mode. Sections of the device that are not being used can be powered down to minimize the current consumption. For example, the DAC can be powered down when a clock output is being generated.The part is available in a 20-lead TSSOP.

技术特性

窄带SFDR > 72 dB
电源电压范围：2.3 V至5.5 V
输出频率最高达37.5 MHz
正弦波输出/三角波输出
片上集成比较器
三线SPI®接口
扩展温度范围：−40°C至+105°C
关断选项
当供电电压为3 V时，功耗为20 mW
20引脚TSSOP封装
Narrow-band SFDR >72 dB
2.3 V to 5.5 V power supply
Output frequency up to 37.5 MHz
Sine output/triangular output
On-board comparator
3-wire SPI® interface
Extended temperature range: −40°C to +105°C
Power-down option
20 mW power consumption at 3 V
20-lead TSSOP

应用领域

频率刺激/波形产生
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
Frequency phase tuning and modulation
Low power RF/communications systems
Liquid and gas flow measurement
Sensory applications: proximity, motion, and defect detection
Test and medical equipment

技术指标

Master fclk : 75MHz
Resolution (Bits): 10bit
Tuning Word Width (bits): 28bit
I/O Interface: Serial
REFCLK Multiplier: No
Compliance Range (V): 0.8V
FS Iout (mA nom): 3mA

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
AD9834BRU 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 6.80	$ 5.80	N 材料信息
AD9834BRU-REEL 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 2500	$ 0.00	$ 5.80	N 材料信息
AD9834BRU-REEL7 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 1000	$ 0.00	$ 5.80	N 材料信息
AD9834BRUZ 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 5.89	$ 5.01	Y 材料信息
AD9834BRUZ-REEL 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 2500	$ 0.00	$ 5.01	Y 材料信息
AD9834BRUZ-REEL7 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 1000	$ 0.00	$ 5.01	Y 材料信息
AD9834CRUZ 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 6.85	$ 5.62	Y 材料信息
AD9834CRUZ-REEL7 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 1000	-	$ 5.62	Y 材料信息

开发工具

产品型号	描述	报价	RoHS
EVAL-AD9834SDZ 产品状态: 量产	Evaluation Board	$ 99.00	是
EVAL-SDP-CB1Z 产品状态: 量产	Evaluation Controller Boa	$ 99.00	是