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ADμC812内集成的ADC转换模块,包含了8通道、12位、单电源A/D转换器。这些A/D转换器由基于电容DAC的常规逐次逼近转换器组成,接收的模拟输入范围为0～+V_(REF)(+2.5V)。另外,此模块还为用户提供片内基准、校准特性,模块内的所有部件能方便地通过3个寄存器SFR接口来设置。总之,ADμC812的ADC模块具有与一般ADC芯片相比拟的性能,并且操作简单、可靠性高,采集速率可高达200kHz。但是,ADμC812内集成的ADC转换模块有其特殊性,如果应用不适当,轻则影响ADC的性能,重则电路完全不能工作,甚至烧毁器件。
The ADC conversion module in the ADuC812 contains an 8-channel, 12-bit, single-supply A / D converter. These A / D converters consist of a conventional successive approximation converter based on a capacitive DAC and receive an analog input range of 0 to + V REF (+ 2.5V). In addition, the module also provides users with on-chip reference, calibration features, all the components within the module can be easily set by the three register SFR interface. In conclusion, the ADC module of ADμC812 has the characteristic that compares with the general ADC chip, and it is simple to operate, high reliability, the collecting rate can be up to 200kHz. However, the ADC conversion module integrated in the ADμC812 has its own particularity. If the application is not suitable, the performance of the ADC will be affected, and the circuit will not work at all or even burn the device.