Key benefits Improved waveform quality: a 70 MHz lowpass filter enhances the signaltonoise ratio for cleaner outputs. Easy amplitude adjustment: accessible pin controls the D/A reference to conveniently set the output waveform amplitude for your application. Flexible square wave duty cycle: adjust the variable resistor to change the square wave duty cycle via the comparator reference input. Stable and accurate frequency generation: AD9850 module uses a 125 MHz active oscillator, while the AD9851 module uses a 30 MHz active oscillator. Versatile data input: supports both parallel and serial data input for flexible integration. Compact and practical: compact 4.5 cm x 2.6 cm form factor suitable for benchtop or embedded use. What it does Waveform generation: DDS modules based on the AD9850 and AD9851 provide multiple outputs in a compact package for generating RF signals with stability. Output options: each module provides two sine wave outputs and two square wave outputs, enabling a range of testing and signaling scenarios. Frequency range and limitations: AD9850 supports 0 to 40 MHz; square wave output is 0 to 1 MHz. Harmonic distortion may increase above 20 to 30 MHz. Signal conditioning: the 70 MHz lowpass filter helps improve the overall waveform quality by attenuating aliasing and frequency components. Adjustable amplitude and duty cycle: user can fine tune output levels and square wave duty cycle through accessible pins and the adjustable resistor. Specifications (highlights) Model compatibility: AD9850 and AD9851 modules Frequency range: AD9850 040 MHz Outputs: 2 sine waves and 2 square waves Harmonic behavior: distortion may increase above 2030 MHz Square wave frequency range: 01 MHz Waveform conditioning: 70 MHz lowpass filter for improved SNR Data input: selectable between parallel and serial data input Amplitude adjustment: accessible pin for easy adjustment of the output amplitude Duty cycle: adjustable via the variable resistor on the square wave path Oscillators: stable active oscillators — 125 MHz for AD9850, 30 MHz for AD9851 Dimensions: 4.5 cm x 2.6 cm Use scenarios Benchtop signal generation for circuit testing and calibration: generate precise sine and square waves at defined frequencies to evaluate filters, amplifiers, and ADC/DAC chains. RF and communications experiments: use the DDS outputs to test receivers, mixers, and RF frontends with configurable amplitude and duty cycle. Educational and hobby projects: a compact, reliable DDS module suitable for learning about waveform synthesis, signal generation, and frequency planning. Notes The device offers a combination of sine and square wave outputs with adjustable amplitude and duty cycle, suitable for a variety of laboratory and development tasks. When operating at higher frequencies beyond 2030 MHz, be mindful of potential increases in harmonic distortion on the sine outputs.