ADC Delta-Sigma范围混乱

亲爱的社区，
我一直与ADC D-S的PSoC5LP没有成功地放大2个divand信号与5MVPP最大。我读过不同的文件，对此我感到很困惑。
在ADC Delta Sigma 3.30参考文献的第9页中，输入±VREF与VREF＝1.024V的范围应该是：- 1.024±1.024＝0V至2.048。为什么在相同条件下的CE95171上，在ADC的负引脚上VREF＝1.024，在第2页中，如果ADC的正输入为0，转换值为-1.024或如果为1.024，则值为0；因此，ADC Delta Sigma 3.30的页9建立的范围不从0V到2.048。然后，工作范围可以支持直到2.048 V作为一个有效的值来工作吗？？？？2.048？gt；1.024V？或者我甚至可以输入3V信号根本没有问题？VDD＝5V？
这是非常混乱的，请您提供任何帮助，我会非常感激，谢谢。



     以下为原文
  Dear community,

I have been working with ADC D-S of psoc5lp with no success to amplify 2 diferential signals with 5mVpp as maximum. I have read different documents and I'm very confused about this.

In page 9 of reference document of ADC Delta-Sigma 3.30 the range with Input ± Vref with Vref=1.024V should be: -1.024±1.024= 0V to 2.048. Why in example of CE95271 with the same condition Vref=1.024 on negative pin of ADC, in page 2 says that if positive enter of ADC is 0 the converted value is -1.024 or if is 1.024 the value is 0; so the range doesn't go from 0V to 2.048 as page 9 of ADC Delta-Sigma 3.30 established? then the range to work can support until 2.048 V as a valid value to work???? 2.048 -> 1.024V? Or can I even enter 3V signal with no problem at all? with VDD=5V?

This is very confused, please any help you can provide me will be very appreciated, thanks in advance.