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想要用ADS1259结合PGA280做一个模数转换器，但问题是我现在的信号是单端信号，请问需要用如附件图纸这样的电路将单端信号转换为差分信号吗？或者直接将AD输入的差分反相端直接接地，正相端接信号正？
单端转差分可以采用全差分运放来实现。
或者ADS1259也支持单端输入，将反相端接地或者接到一个参考电平上都行，参考电平一般为1/2Vcc.
