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ADS1292内部测试信号出来的是负值,而不是1MV。为什么呢。



我用手册说的测试命令,产生内部测试信号,但是当我用万用表的正负极去接2和1管脚(即PGA1P

PGA1N)时却是-1MV,且AD转换后的数据是FF EB 79 之类的数据。但我可以读出正确的寄存器内的数值。求大神们告知是怎么回事。