AD9850 DDS Signal Generator Module Sine Wave Square Wave Generator Development Board Module The module can output sine wave and square wave, 2 sine wave and 2 square wave output: AD9850: 0-40MHz AD9851: 0-70MHz (After the frequency is 20-30MHz, the harmonics will become larger and larger, and the waveform will become more and more unclean) Square wave: 0-1MHz; * Adopt 70MHz low-pass filter to make the SN ratio of the waveform better; *The voltage of the reference input terminal of the comparator is generated by a variable resistor, and the square wave of different duty cycles can be obtained by adjusting the resistor; *AD9850 module adopts 125MHz active crystal oscillator, AD9851 module adopts 30MHz active crystal oscillator; The main difference between AD9850 and AD9851 *The AD9850 can be clocked up to 125MHz and the AD9851 can be clocked up to 180MHz. The output frequency of the AD9851 is higher than the AD9850. *AD9850 does not have multiplier by 6, AD9851 does. Dimensions: 25*45MM