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ADS1178- 如何让输入电压范围扩大

Other Parts Discussed in Thread: ADS1178

Q1: 1178的全量程是-Vref~+Vref,目前使用的Vref=2.5V,那么全量程为-2.5V~+2.5V,这样理解没有问题吧?

Q2: 目前需要采集倾角传感器,电压范围是0~5V,目前是通过电阻分压,将电压范围降低到0~2.5V,但这样相当于降低了精度,请问如何让0~5V转换成-2.5V~+2.5V?

Q3:目前采集的电压信号抖动比较严重,如果使用低通滤波器,并将频率设置为低于10Hz,是否会对ADC的采集造成影响?