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AMC7836: AMC7836内部自动保护问题

Part Number: AMC7836


AMC7836-45度,芯片的ADC/DAC好像保护了,然后重新高温烘烤后又恢复正常。请问哪个寄存器能打开这个保护功能??

另外芯片锁死后:各寄存器是可以读写的,但是ADC无法采样;检查了个工作电压正常,所有芯片的寄存器能正常读写。但是芯片的基准电压(REF引脚)无输出, ADC没有了参考电压所以输出数据是0