描述
偏差(offseterror)是指保证输出代码为0时的理想输入模拟量与实际输入模拟量的偏差。计算方法:输出第一个代码发生变化时ADC的实际输入模拟值减去1/2个最小有效位(LSB)大小再减去理想的0代码输入模拟值。
ADC的增益误差(gainerror)是指满量程输入时输出代码的误差。计算方法:满量程输出代码加上11/2最小有效位(LSB)时输入值与满量程输出代码时输入之间的差值,再加上偏差(offseterror)。
最小有效位(LSB)大小是通过测量最小的和最大的转换点后计算得到的。理想情况下,模拟输入变化一个LSB值,将引起输出端变化一个代码。
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