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关于OPA1632共模电压输入Vcom电压的设置问题,求大佬、工程师们解答,感谢!

Other Parts Discussed in Thread: OPA1632, PCM1865

你们好,

因为音频编码器PCM1865的模拟输入范围为0-2.1V,是差分输入,而前端的麦克风输出是单端输出,所以我们使用了OPA1632全差分运放来单端转差分,但是不知道OPA1632的Vcom共模电压输入管脚要设置多大的电压比较合适?

我认为共模偏置电压应该设置为PCM1865输入范围的1/2才对。也就是Vcom=1V。您们怎么看?