LPS331AP数据就绪脉冲不能始终如一地发射

你好伙计们，


不知道在哪里发布这个，因为传感器类别中的压力传感器似乎没有任何子类别，所以我在这里发布它，请原谅任何有关该计数的进攻。

我们一直在使用LPS331AP进行几种设计，并且只有在最近的一次电路板旋转中我们才注意到这个问题。我们使用的电路与数据表中详述的相同。器件配置为I2C通信模式，分辨率设置为0.025 mbar，温度和压力的内部平均值设置为1，温度和压力设置为25 Hz的连续模式速率，两个中断引脚均配置为数据就绪中断。

我们遇到的问题是数据就绪脉冲不能始终如一地发射（见附图），所以虽然它会定期以正确的速率运行，但它会经常错过脉冲。将具有相同寄存器配置（可正常工作）的单元与另一个单元进行比较，该单元与电路立场没有明显的电气差异，也没有从配置寄存器的角度看出。

我真的很想知道可能导致这种情况的原因，我希望有人可能会知道是什么原因造成这个问题。

任何想法或相关经验与人们可以分享的这部分将非常感激。

非常感谢，无论如何。

问候，

格雷格
＃lps331ap数据准备好断言-SP



以下为原文




Hello Folks,


Not sure where else to post this as there doesn't seem to be any subcategory for pressure sensors in the sensors category, so I'm posting it here, please forgive any offense on that count.

We've been working with the LPS331AP on a couple of designs and only on a recent board spin have we noticed this issue on a number of units.  The circuit we're using is identical to that detailed in the datasheet.  The device is configured in I2C communications mode, with the resolution set to 0.025 mbar, the internal averaging for both temp and pressure set to 1, continuous mode rates set for 25 Hz for both temperature and pressure, and both Interrupt pins configured as data ready interrupts.   

The problem we're having is that the data ready pulse does not fire consistently (see attached picture), so while it will operate at the correct rate periodically, it will frequently miss pulses.  Comparing a unit with identical register configurations (which works correctly) with another unit which does not shows no apparent electrical differences from a circuit standpoint nor any from a configuration register standpoint.

I'm really scratching my head as to what might be causing this and I was hoping that someone might have some idea if what could be causing the issue.   

Any ideas or relevant experiences with this part that folks could share would be much appreciated.

Thanks kindly in every case.

Regards,

Gregg      
#lps331ap-data-ready-asserting-sp