针对实际开发使用过程中,TMS320F281xDSP内置ADC存在非线性误差问题,给出了一种误差补偿方法.在硬件上通过REF3120提供稳定的外部参考电压;在软件上,应用平均值法和分段补偿法进一步提高A/D转换性能,从而有效地消除误差,使测量精度达到0.1%.
In view of the actual development in use process,the built-in ADC TMS320F281 xDSP problems of nonlinear error,a method of error compensation is presented.On hardware through REF3120 provide stable external reference voltage,on the software,the method of average and piecewise compensation method to further improve the performance of A/D conversion effectively eliminate the error.