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Other Parts Discussed in Thread: ADS125H02

ADS125H02开发板接入TI提供的电脑软件,开发板的模拟端口短接,测试噪声。 完全按照产品资料中的Typical Noise (en) in µVRMS and (µVPP) for Input Voltage Ranges ±20 V to ±1.25 V的条件测试。 但是噪声很大,超出我们的预料。 附件为为双端AIN0-AIN1差分输入,0.1875倍数,sinc1, 2.5sps 测试图片。

还有一个现象很奇怪。我们在寄存器中设置了2.5sps的输出速率,但是点击软件中的COLLECT DATA, 100个数据,只要数秒就显示出了时域图。 工程师说反复查验,设置是对的。