请问一下:
NUC472供电电压VDD和AVDD均为5V,VREF连接到AVDD,也为5V,ADC为单端采样,但是为什么采样频率一直是400k,不能达到800k?
Supports conversion rate 400 kSPS while VREF is between 2.5V~5.5V and up to 800 kSPS while VREF is between 4.5V~5.5V in single-end mode
谢谢大家帮忙解答!
Vref Control Bits (Write Protect)
00011=Vref is internal 2.65V.
00111=Vref is internal 2.048V.
01011=Vref is internal 3.072V.
01111=Vref is internal 4.096V.
10000=Vref is from AVDD.
Others=Reserved.