This 4-channel A / D converter uses an inverter for each input channel, so the conversion can take place exactly simultaneously on all channels, which is often a requirement when measuring signals with high bandwidth. In addition, use of the A / D converter's full speed. The conversion of multiple A / D card installed in the same PC can be synchronized. DMA transfers are supported, as A / D converter full speed can be utilized. The differentially coupled inputs ensures the best possible noise suppression.