Check the listing for details. AD9850 DDS Signal Generator Module. Condition: New. Listed at 14.99 USD. * The module can output sine wave and square wave, 2 sine wave and 2 square wave. AD9850: 0-40MHz AD9851: 0-70MHz after the frequency is 20-30MHz, the harmonic wave will become larger and larger, and the waveform will become more and more dirty. Square wave: 0-1MHz * Adopt 70MHz low-pass filter to make the SN ratio of waveform better * Lead out the pin (PIN12) that generates DA reference, which is convenient for the amplitude adjustment application of output waveform. * The reference input voltage of the comparator is generated by variable electronic resistance, and different duty cycle square waves can be obtained by adjusting the electronic resistance. * The AD9850 module uses 125MHz active crystal oscillator, while the AD9851 module uses 30MHz active crystal oscillator main differences between AD9850 and AD9851 * The clock frequency of the AD9850 is 125MHz, and the clock frequency of the AD9851 is 180MHz. The output frequency of AD9851 is higher than that of AD9850. * AD9850 does not have 6 frequency doubling, AD9851 does