CAUTION The U SP value must be included in the allowable range of the supply voltage (from 10 to 36 V). If for any reason the voltage of the DAC power supply exceeds the calculated value U SP max , then the limiting resistor should be connected in series with the load, the resistance of which is calculated by the formulas:
R limitmin limitnominal limitmax R limitmin ј U PS U PSmax I DACmax R limitmax ј U PS U PSmin I DACmax where R limit nominal is nominal value of the limiting resistor, kΩ; R limit min is minimum permissible value of the limiting resistor, kΩ; R limit max is maximum permissible value of the limiting resistor, kΩ; I DAC max is the maximum allowable current of DAC, mA; U PS is voltage of the source used to power the DAC, V. An example of the connection to the output of type И with a power source and load is presented in Figure 5.4 . 25