- DDS module supporting AD9850 and AD9851: outputs both sine and square waves, with 2 sine outputs and 2 square outputs. AD9850 provides 0-40 MHz as base sine frequency, while AD9851 provides 0-70 MHz. At frequencies above about 20-30 MHz, harmonics increase and the waveform may become less clean. Rectangular/square wave output is available up to 0-1 MHz. - Improved waveform quality: a 70 MHz low-pass filter is used to improve signal-to-noise ratio and overall waveform quality. - Flexible amplitude adjustment: includes a pin to generate the DA reference, enabling easier adjustment of output amplitude to suit different applications. - Variable duty cycle for square waves: the comparator reference input is generated by a variable resistor, allowing adjustment of the duty cycle of the square wave output. - Stable oscillators: AD9850 module uses an active oscillator at 125 MHz, and the AD9851 module uses an active oscillator at 30 MHz, delivering stable and reliable performance. - Compact form factor: dimensions are 5 cm by 2.6 cm, making the module easy to integrate into various projects. Typical applications - Lab signal generation for testing microcontroller, FPGA, or RF circuits, where configurable sine and square waves are required. - RF experimentation and spectrum analysis, using the sine output for tones and the square output for timing signals. - Educational and development benches where adjustable amplitude and duty cycle help demonstrate DDS concepts and waveform behavior.