The SI8935ISO-KIT evaluation board allows for quick connection to a voltage signal for check out of the functionality of the Si8935 delta-sigma modulator. The evaluation board is populated with the Si8935D-IS4 device which allows for up to 2.5V voltages to be measured directly or much higher voltages with a voltage divider. This board provide direct access to DSM output signals via BNC connectors, a SINC3 filter with programmable OSR and sample size, a USB connection to a host PC, and a downloadable GUI for access to the SINC3 filter and the onboard programmable DSM clock source. The GUI provides a visual display of the time series and FFT of the device output with dynamic performance data along with options to change the DSM clock and sample size. The board features test points for monitoring the inputs, outputs, and supplies for the device. Surface mount component pads are available for input or output filtering circuits. The Si8935ISO-KIT evaluation board demonstrates the functionality, the accuracy, and the stability, of the Si8935 delta-sigma modulator.