最近一款应用中采用ADS1240作为模块ADC,但是为IC如上电路供电时发现 DVDD电压 达到 4.1V~4.3V(实际供电3.3V,测试了多个IC,都是这样),随后断开3.3V供电,只保留AVDD,发现DVDD管脚电压为4.1V。因为前面没用过这个ADC,也不知道这种情况是否正常?
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最近一款应用中采用ADS1240作为模块ADC,但是为IC如上电路供电时发现 DVDD电压 达到 4.1V~4.3V(实际供电3.3V,测试了多个IC,都是这样),随后断开3.3V供电,只保留AVDD,发现DVDD管脚电压为4.1V。因为前面没用过这个ADC,也不知道这种情况是否正常?