AD9833 Programmable Function Generator Module — SPI, 0–12.5MHz

AD9833 Programmable Function Generator Module — SPI, 0–12.5MHz

The AD9833 function generator module is a programmable waveform generator based on the Analog Devices AD9833 DDS (Direct Digital Synthesis) chip. Generate sine, square, and triangle waves from 0 to 12.5MHz with 28-bit frequency resolution via SPI from Arduino. Ideal for signal generation, audio testing, and RF applications.

Key Specifications

• IC: AD9833 | Frequency range: 0–12.5MHz
• Waveforms: Sine / Square / Triangle
• Frequency resolution: 28-bit (0.1Hz steps at 25MHz clock)
• Interface: SPI (3-wire) | Supply: 3.3V (5V tolerant SPI)
• Output amplitude: ~0.6V peak-to-peak
• Compliance: RoHS compliant

Why Choose This?

• ✅ 28-bit frequency resolution — 0.1Hz steps for precise frequency control
• ✅ 3 waveform types — sine, square and triangle from a single module
• ✅ SPI control — simple 3-wire interface from any Arduino
• ✅ Up to 12.5MHz — covers audio, ultrasonic and RF frequency ranges

Typical Applications

• Arduino signal generator and function generator
• Audio frequency testing and tone generation
• Ultrasonic transducer driver frequency control
• RF carrier and modulation signal generation

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