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ADS58b19模拟信号输入范围

Other Parts Discussed in Thread: ADS58B19

TI专家:

             您好!我马上要使用ADS58b19,有个疑问请教下,datasheet上关于模拟输入端口信号幅值范围描述如下:

                     For a full-scale differential input, each input pin (INP, INM) must swing symmetrically
                    between VCM + 0.375V and VCM – 0.375V, resulting in a 1.5VPP differential input swing.

             我们知道INP和INM是极性相反的信号,INP为VCM+0.375v时INM为VCM-0.375v,这样产生的differential input swing应该也只有0.75V,怎么来的1.5V呢???

              请问是我哪里理解错了吗?请指教!