Document Type: Technical Information
Download Count: 80
Published time: 2020.06.26
Digital to analog converters (DACs) convert a binary number into a voltage directly proportional to the value of the binary number. A variety of applications use DACs including waveform generators and programmable voltage sources. This application note describes a Delta-Sigma DAC implemented in a Virtex FPGA. The only external circuitry required is a low pass filter comprised of just one resistor and one capacitor. Internal resource requirements are also minimal. For example, a 10-bit DAC uses only three Virtex CLBs. The speed and flexible output structure of the Virtex series FPGAs make them ideal for this application.