【应用笔记】一种高精度低成本单电源ADC输入 AN2615 Application note A high precision, low cost, single supply ADC for positive and negative input voltages Introduction In general the ADC embedded in the ST7 microcontroller is enough for most applications. But, in some cases it is necessary to measure both positive and negative voltages. This requires an external ADC with this particular capability. Most external ADCs require a dual supply to be able to do this. However, microcontroller-based applications usually only have a pos……