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AD9837,pdf (Programmable Waveform Generator)
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AD9837是一款低功耗、可编程波形发生器，能够产生正弦波、三角波和方波输出。各种类型的检测、致动和时域反射(TDR)应用都需要波形发生器。输出频率和相位可通过软件进行编程，调整简单。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。
AD9837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。
AD9837具有关断(SLEEP)功能。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。
AD9837采用10引脚LFCSP_WD封装。
The AD9837 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 (TDR) applications. The output frequency and phase are software programmable, allowing easy tuning. The frequency registers are 28 bits wide: with a 16 MHz clock rate, resolution of 0.06 Hz can be achieved; with a 5 MHz clock rate, the AD9837 can be tuned to 0.02 Hz resolution.
The AD9837 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 AD9837 has a power-down (sleep) function. Sections of the device that are not being used can be powered down to minimize the current consumption of the part. For example, the DAC can be powered down when a clock output is being generated.
The AD9837 is available in a 10-lead LFCSP_WD package.
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