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系统电源整合问题和运放设计

Other Parts Discussed in Thread: OPA2277

产品中有6个输入量:2个24v工作电源的4-20ma输出电流传感器,4路pt100,原来设计采用2个开关电源,一个单独24V,另一个+12v  -12v  +5v,但是24v的电流传感器接入到12v工作电压的OP中,地线不同,会不会烧坏OP,采用OPA2277ua处理pt100信号的话,能否用单电源,求支持