The ISL5314EVAL2 provides a means for evaluating the ISL5314, 125MSPS, direct digital synthesizer (DDS). The board is controlled with software that allows for any clock frequency and output frequency within the abilities of the ISL5314 to be evaluated. The interface between the PC and the evaluation board is via the parallel port of an IBM-compatible PC. The analog output of the DDS can be analyzed on external measuring equipment; typically either a spectrum analyzer or an oscilloscope. The clock source for the DDS can either be a user-changeable crystal or an external signal generator provided through an SMA connector.

The board is shipped with a 125MSPS crystal. The complementary analog outputs of the DDS are processed through a 1:1 transformer. The board can be reconfigured to bypass the transformer and only a single-ended output used. Because there is an on-chip comparator, the means to process the analog sine wave from the DDS output into the comparator inputs is provided for square wave generation. The comparator's output is provided via an SMA connector.


  • GUI software control via parallel port
  • Clock: On-board crystal socket or externally applied
  • 1:1 RF transformer for analog output


  • Programmable local oscillator
  • FSK, PSK modulation
  • Direct digital synthesis
  • Clock generation


Title language Type Format File Size Date
star ISL5314EVAL2 User Guide Manual - Development Tools PDF 234 KB


Title language Type Format File Size Date
ISL5314 Evaluation Board Software v4.2 Library EXE 1.82 MB
isl5314-design-model Model - Other IBS 13 KB
ISL5314 Evaluation Board Layout Files PCB Design Files PDF 703 KB
ISL5314 Evaluation Board Schematic Files PCB Design Files PDF 334 KB