AD9837,pdf (Programmable Waveform Generator)

AD9837是一款低功耗、可編程波形發(fā)生器，能夠產生正弦波、三角波和方波輸出。各種類型的檢測、致動和時域反射(TDR)應用都需要波形發(fā)生器。輸出頻率和相位可通過軟件進行編程，調整簡單。頻率寄存器為28位：時鐘速率為16 MHz時，可以實現(xiàn)0.06 Hz的分辨率；而時鐘速率為5 MHz時，則可以實現(xiàn)0.02 Hz的分辨率。

AD9837通過一個3線串行接口寫入數(shù)據(jù)。該串行接口能夠以最高40 MHz的時鐘速率工作，并且與DSP和微控制器標準兼容。該器件采用2.3 V至5.5 V電源供電。

AD9837具有關斷(SLEEP)功能。器件中不用的部分可以關斷，以將功耗降至最低。例如，在產生時鐘輸出時，可以關斷DAC。

AD9837采用10引腳LFCSP_WD封裝。

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.