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运放的电源抑制比怎么理解?

Other Parts Discussed in Thread: OPA333

电源抑制比PSRR有三个参数,如OPA333

1、电源抑制比为1uV/V

2、长期稳定性为1uV

3、通道分离,直流为0.1uV/V

特别是3号参数,怎么理解