如何在Δ∑ADC上达到20位分辨率

我有一些关于CY8C58系列PSoC和模拟性能的问题。
数据表要求在Δ∑ADC上达到20位分辨率。有没有真实世界的测试来验证这一水平的准确性实际上是可以实现的？内部参考为1.024V，在20位给出1UV/计数。考虑到你可以把任何PIN路由到任何功能，数字噪声和模拟噪声都有可能被耦合到要测量的模拟信号中。
我期望实际获得20位分辨率差分信令，并且PSOC必须在测量期间保持安静。来自赛普里斯的示例代码演示了如何执行这样精确的ADC测量吗？有什么其他的窍门或设计哲学需要遵循内部Delta Sigma ADC来达到这一精确度吗？



     以下为原文
  I have some questions regarding the CY8C58 series PSoC and analog performance.
    The datasheet claims up to 20 bits resolution on the delta-sigma ADC. Are there any real-world tests to verify that this level of accuracy is actually achievable? The internal reference is 1.024V, which at 20 bits gives 1uV/count. Given that you can route any pin to any function there is potential for both digital noise and analog noise to get coupled into the analog signal to be measured.
    I expect to actually get 20 bits of resolution differential signalling will be required and that the PSoC would have to be quiesced for the duration of the measurement. Is there example code from Cypress which demonstrates how to perform such an accurate ADC measurement? Are there any other tricks or design philosophies which need to be followed to achieve this level of accuracy with the internal delta-sigma ADC?