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PGA308标定输出范围0.5v-4.5v 满程输出会漂移

Other Parts Discussed in Thread: PGA308, PGA300

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?