dear sir
now l use DAC900 to achieve the current to voltage convertion, the schematic is as follow; the CH1 is the 5V_DAC, CH2 is DACB_CLK,CH3 is
test point TP8(test point up the R121), we can see the 5V_DAC is fine; when the fpga reset the DAC900E( write data to zero )with normal operation,The TP
8 voltage is detective to be about 0.5v after more than 50ms, what`s the problem ? when l change the FSA resistant R155 from 4.7k to 7.5k , FPGA reset
reset the data to zero, there is no bias voltage; what`s the correct setting ? can you help me ?