Aiming at the requirements of the accuracy of analog signal output and the number of channels in complex temper-ature environment in the field of unmanned aerial vehicle comprehensive test,a multi-channel high-precision analog output board in a wide temperature range was designed.The system used FPGA as the main control unit,used a 16-bit D/A converter AD5372,used DS18B20 temperature sensor to monitor the working temperature of the system in real time,and calibrated the tem-perature of the analog output.Finally,64 analog signals were accurately output at 0～85℃,and the output range was-10～10 V.In order to improve the versatility and standard,the system supported three data communication interfaces of Gigabit Ethernet,LVDS and RS422,and was equipped with host computer software to realize human-computer interaction.Through practical engi-neering verification,the error of the output analog signal under the condition of 0～85℃is within±0.5 mV,which meets the sys-tem design index,and provides a reliable engineering solution for generating multi-channel high-quality analog signals in the field of unmanned aerial vehicle testing.
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