How to change the ADC scan rate

ViSh_3577471 · ‎Mar 22, 2020

Hi

My kit is PSoC63.I can find some information from ADC datasheet .The achieved scan rate is dependent on the following:

▪ ADC clock rate

▪ Number of channels

▪ Averaging

▪ Resolution

▪ Achieved acquisition time

The parameters of number of channels ,averaging and resolution are fixed, so which API can change the scan rate ?

Best regards, vick.

LinglingG_46 · ‎Jul 27, 2020

你可以直接看datasheet page 5,6,7，之前我的回复里面把问题描述复杂了。

SAR ADC的时序图如下：

采样速率的计算公式为：

总共是18个clock周期。

如果你想达到改采样速率的目的，那么你可以改ADC的时钟。

如果你想获得achieved scan rate = 1MSPS,

环境的基本设置参数：channel =1, no average, resolution =12, achieved acquisition time =167ns,

倒推过去，你需要设置ADC的clock设置成18Mhz，其它的速率也是同样的方式。

Re: How to change the ADC scan rate