PGA308标定输出范围0.5v-4.5v 满程输出会漂移 （漂移范围正负20mv）
供电：5V
参考：4.096V
输入：0-130mv
输出：0.5-4.5v（满程有漂移）
已测量外围电路电压都是稳定状态
请教出现满程漂移是什么问题？
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