The DAC5674 is a 14-bit resolution high-speed digital-to-analog converter (DAC) with integrated 4x-interpolation filter, on-board clock multiplier, and on-chip voltage reference. The device has been designed for high-speed digital data transmission in wired and wireless communication systems, high-frequency direct-digital synthesis (DDS) and waveform reconstruction in test and measurement applications.

The 4x-interpolation filter is implemented as a cascade of two 2x-interpolation filters, each of which can be configured for either low-pass or high-pass response. This enables the user to select one of the higher order images present at multiples of the input data rate clock while maintaining a low date input rate. The resulting high IF output frequency allows the user to omit the conventional first mixer in heterodyne transmitter architectures and directly up-convert to RF using only one mixer, thereby reducing system complexity and costs.

In 4x-interpolation low-pass response mode, the DACs excellent spurious free dynamic range (SFDR) at intermediate frequencies located in the first Nyquist zone (up to 40 MHz) allows for multicarrier transmission in cellular base transceiver stations (BTS). The low-pass interpolation mode thereby relaxes image filter requirements by filtering out the images in the adjacent Nyquist zones.Read more