用模拟开关配置获取零点和量程输出代码的正确安装。Maxim > App Notes > Analog Switches and Multiplexers Keywords: A/D converters, ADCs, A/D converter calibration, offset flipping, handheld devices Jan 13, 2011 APPLICATION NOTE 4539 Precise Calibration of Dual-Slope ADCs Abstract:This circuit calibrates ADCs on-the-fly, using analog switches to configure the setup properly for obtaining the zero and span output codes. A similar version of this article appeared in the December 31, 2007 issue of EE Times magazine. Handheld devices for measuring toxic gas, blood glucose, etc. are increasingly popular, and their low cost has made them throwaway devices, to be discarded when the battery or the sensor expires. Typical devices include a lithium (Li) primary cell, a sensor, an A/D converter (ADC), conditioning ci……