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ADS8685: ADS8685工作不正常

Part Number: ADS8685

ADS8685  REFIO和REFCAP引脚输出电压是3.7V是不是芯片损坏了?

AVDD引脚供电需要限流吗,我的供电电压是5.3V,刚开始能够正常采样,过了一会就不行了。采集到的电压也不准确,相差将近2mV,是供电问题吗。