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SM320F2812-HT: AD参考电压

Part Number: SM320F2812-HT
Other Parts Discussed in Thread: SM320F2812

你好!请教一下,SM320F2812这款芯片片上有12位精度的AD,这个AD的计算公式都是按照3V作为参考,但是供电是3.3V供电,请问这边电源的供电电压由于温度的原因由3.3V降低为3.2V,对这个AD采集数据会有影响吗?我找了下数据手册,没有找到AD具体是由什么来作为参考电压。