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OPA237 用作电压跟随器 不能跟随,型号选的不对还是电路有问题,求解

Other Parts Discussed in Thread: OPA237, OPA313

最近用OPA237作为电压跟随器使用,是测试电池电压的,电池电压经电阻分压后输入到OPA,电池电压从3.0V到4.2V变化,但是从OPA输出的  并不是跟随电压变化的  ,而且输出最高2.6几伏