CC2640R2F ADC问题

1.Sensor Controller可以更改ADC的参考电压吗？默认是4.3V？

2.模拟输入是0到1.25V，ADC的参考电压采用1.44V还是4.3V好？这两种参考电压有什么区别（优缺点）？

Viki Shi：

1、默认是0，可以选ADC_REF_FIXED； ADC_REF_VDDS_REL
2、The ADC supports two different internal references, one constant and one relative to VDDS.
The ADC automatically scales down the input signal to be within the reference range. It is possible to disable the scaling, but this requires great care by the user to ensure the maximum ratings in the data sheet are followed. With scaling enabled, the internal fixed reference looks like 4.3 V compared to the actual input level. With scaling disabled, the reference is 1.44 V.