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ADS8867: ADS8867 引脚短路

Part Number: ADS8867
Other Parts Discussed in Thread: THS4281, , OPA333, OPA320, REF5050

在上电的过程中,板子先上电,后续接入模拟量,发现 REF跟GND短路,Vref端的电路是 基准芯片出来经过滤波电容到REF端。请问下这个问题怎么解决?