基于DSP28335的飞控计算机DAC扩展电路设计  

Design of extended DAC circuit of flight control computer based on DSP28335

作　　者：李勇[1] 罗秋凤[2] 叶慧[1] 高振[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016 [2]南京航空航天大学无人机研究院,江苏南京210016

出　　处：《电子设计工程》2014年第8期28-30,33,共4页Electronic Design Engineering

摘　　要：为了实现UAV的舵机和油门调节控制的需要,飞控计算机系统采用BURR-BROWM公司的D/A芯片DAC7725N来设计D/A扩展模块。使用CPLD实现接口逻辑,简化了电路设计,后续的系统调试验证表明,D/A转换通道在1 000 Hz的刷新频率下,精度能够达到5.8 mV,完全能够满足UAV飞行控制系统实际应用的要求,具有较高的实用性。In order to achieve the need of control of steering and throttle for flight control computer of UAV, BURR-BROWM company＇s D/A chip DAC7725N was used to design the D/A extension module. CPLD was used to realize the interface logic, which simplifies design of circuit. Subsequent system debugging indicates that precision of D/A conversion channels can reach 5.Smv in the refresh frequency of 1000HZ, which can completely satisfy the practical application of UAV flight control system and has higher practicability.

关 键 词：数模转换 DAC7725N DSP28335 复杂可编程逻辑器件 

分 类 号：TN710[电子电信—电路与系统]