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问一下ADS7864这款模数转换器

Other Parts Discussed in Thread: ADS7864

一般AD转换器都会给出模拟输入在相应参考电压下对应的数字输出,比如2.5v参考电压,16位AD,模拟输入0v对应数字输出0000H,模拟输入2.5V对应数字输出FFFFH。

ADS7864是12位AD,参考电压2.5v,输入范围-2.5v至2.5v。但这个手册里从头到尾都没说输入模拟电压和输出数字量的对应关系,想知道当(+IN)-(-IN)也就是输入为-2.5v时对应的数字输出是多少? 输入为2.5v时数字输出是多少?