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你好!
1) ADS8342测直流电压,数据跳动是肯定的,应为ADC有内部的热噪声和量化噪声,再加上你系统内电源、基准的波动。关键是后面几位在跳动,你可以跟ADS8342规格书,第17页,共27页,Figure 25 和Figure 26 来对比,一般你的测试histogram比规格书的大1~2 LSB 是正常的。
2)只要你能正常读,写ADS8342内部的寄存器,那应该与读写时序无关。