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ADS131E08数据转换问题

Other Parts Discussed in Thread: ADS131E08

ADS131E08  测试信号引脚TESTN和TEATN的配置为高电平,实际使用没有使用到测试信号,采样外部信号,   寄存器配置为config1 = 92;config2 = F3; CONFIG 3 = EO; CONFIG4=00;   8个通道配置为40; 实际采样到的数据有轻微的噪声,连接仪器后按打印键有震荡,如果把那2个引脚悬空后就不会出现这样的原因,这时为什么,是寄存器配错了吗?