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ADS1258工作在固定通道模式下的通道选择疑问

Other Parts Discussed in Thread: ADS1258

当ADS1258设置在固定通道模式工作时(即CONFIG0的MUXMOD为设置为1),这时MUXSCH寄存器的为AINN[3:0]选择作为ADC负极的模拟输入通道,AINP[3:0]选择作为ADC正极的模拟输入通道,现在有个疑问,在此种工作模式下,为什么要选择ADC的正极和负极的模拟输入通道,算是差分输入吗?在这种工作模式下,能不能以AINCOM为参考,AIN0~AIN16的其中一个通道作为输入?