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ADS131A02: 0-50的温度范围内,ADC输出漂移0.1%

Part Number: ADS131A02

请问ADS131A02在使用中,增益设置默认,当ADC输入3V时,在0℃-50℃范围内,MCU读取到ADS131输出漂移3mV左右;当输入是0.3V时,漂移量则为0.3mV,请问这个现象的如何解释?符合规格书要求吗?