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ADS1119: ADS1119 采样速度无法改变

Part Number: ADS1119

问题: 将ADC1119 配置为 330SPS 的采样速率,但是DRDY 信号需要等待45ms的时间才变为低电平(数据准备好),配置为1K PSP也是45mS  DRDY信号变成低电平,读出来的配置时正确的。


主控STM32F103C8T6,使用IO口模拟IIC 与ADS1119通讯;


      初始化(配置为330 SPS)——>启动采样——>延时5mS——>采样数据——>切换通道——>启动采样——>延时5mS——>采样数据(重复前面步骤)

对ADS1119 IIC信号进行分析:


       (这张图指示 DRDY 45ms 才变成低电平)