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ADS1256单端输入无法测量负电压。

Other Parts Discussed in Thread: ADS1256, ADS1255

信号接入AIN0、AINCOM。并且与信号发生器共地。

开启ADS1256的buffer时,输入信号为 ±0.25V的方波,在DOUT采集到的数据为+0.25V 、-0.1V。

但不开启ADS1256的buffer,输入信号为 ±0.25V的方波,却能在DOUT采集到+0.25V 、-0.25V的数据。

这是因为ADS1256不能输入负电压吗?