1. AD9850 and AD9851: The module can output sine waves and square waves, with 2 sine wave outputs and 2 square wave outputs. The frequency range of the AD9850 is 0 40MHz, while the AD9851 is 0 70MHz. However, at frequencies above 20 30 MHz, harmonics increase and the waveform becomes less clean. The square wave output range is 0 1 MHz. 2. Improved waveform quality: A 70 MHz low pass filter is used to enhance the signal to noise ratio of the waveform, resulting in better waveform quality. 3. Flexible amplitude adjustment: Designed with a pin (PIN for generating the DA reference), enabling adjustment of the output waveform amplitude according to different application requirements. 4. Adjustable square wave duty cycle: The reference input voltage of the comparator is generated by a variable resistor, allowing adjustment of the square wave output's duty cycle. 5. Stable oscillators: The AD9850 module uses a 125 MHz active oscillator, while the AD9851 module includes a 30 MHz active oscillator, ensuring stable and reliable performance. 6. Compact size: The module measures 5 cm x 2.6 cm, making it compact and easy to integrate into various projects.