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AWR1843AOP: GPADC采样不准

Part Number: AWR1843AOP

我们将GPADC1拉到GND,通过万用表测量电压为0,但是adc采样的avg值是0x11,约合0.03V,与实际偏差较大,请问可能的原因会是什么呢?

我们的settlingTime配置为3,sampleCnt配置为10