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https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/625646/ads7800-is-the-internal-voltage-reference-used-to-determine-the-digital-output-value-for-this-adc
此部分说明存在具有5 % 容差(1.9V至2.1V)的内部电压参考。 此电压参考是在内部用于确定数字输出值，还是仅供用户自行决定外部使用。
谢谢
Mike
