说明：  数字电压表中常采用式ADC0832。DAC0832是8位串行A/D转换器；转换速度较高（250KHz时转换时间32ms）；单电源供电，功耗低（15mw）。具有较高的抗干扰特性。
(Digital voltage meter often used type ADC0832. DAC0832 8-Bit Serial A/D converter conversion speed higher (250KHz when the conversion time 32ms) single power supply, low power consumption (15mw). Have a high anti-interference characteristics.)