SFUSB-8131 card is USB bus-precision 16-bit AD, DA multifunction card. AD in the 200KHz acquisition rate, the absolute accuracy, relative accuracy are to achieve ± 3LSB. 4K words of first-in-first-out memory (FIFO), to facilitate the acquisition system to work in Windows and real-time multi-tasking operating system. AD trigger mode can have a variety of options. The response FIFO interrupt AD conversion complete interrupt communication with the board. 4-channel 16-bit DA output range selection, automatic power-output range lower limit level. Timer / counter part: FPGA integrated four-channel timer / counter channels of 32-bit word length, accurate gated count is simple. For applications that require high-precision measurement and control of portable applications on-site or embedded inside the instrument.