这是我的原理图,如果要实现四线RTD测量将如何接线,我无论通过stm32还是arduino都只能读出0
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您好,
看您参考的是EVM板中的电路,在 ADS124S08 EVM用户指南中有对四线RTD接线的说明,如下截图所示,建议您参考用户指南说明进行接线;
ADS124S08 EVM用户指南:ADS1x4S08 Evaluation Module User's Guide (Rev. A)
注意确认下电路图中的两种地信号是否进行单点连接?
下面参考设计是四线RTD应用,里面有设计过程和Code Example,希望对您有帮助:
Four-wire PT100 RTD measurement circuit with low-side reference (Rev. A)