我现在需要将64路电压信号(共AGND)转换成4-20mA信号输出,拟采用XTR117来实现,设计电路如下所示
多片XTR117共用一个24V电源(VCC)供电。实际调试时发现每片XTR117的电源需要隔离才能正常工作,一旦共用电源就无法正常工作。请问是我的设计上有问题还是多片XTR117使用时片间供电必须是隔离的?
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