AD9833 DDS signal generator module

This project is a solution verification board design used to verify the direct digital synthesis (DDS) chip AD9833BRMZ of Lichuang Mall. This project is an example project of the EDA open source hardware platform solution verification module solicitation order.

The AD9833 is a fully integrated direct digital synthesis (DDS) chip. The chip requires a reference clock, a low-precision resistor and decoupling capacitors to provide a digitized sine wave up to 12.5 MHz. In addition to generating this RF signal, the chip is fully capable of a wide range of simple and complex modulation schemes. These modulation schemes are fully implemented in the digital domain, allowing complex modulation algorithms to be implemented accurately and simply using DSP technology.

This low-power DDS device is a digitally controlled oscillator that uses a phase accumulator, a SIN ROM and a 10-bit D/A converter integrated on a single CMOS chip. The +2.3 V to +5.5 V supply supports clock rates up to 25 MHz. Phase modulation and frequency modulation functions are provided. The frequency accuracy can be controlled to one part in 250 million. Modulation is achieved by loading a register through the serial interface.