BA3121改进型接法

BA3121共地隔离芯片，有个缺点，上电时的冲击声较大，经过实验可以采用正负双电源供电，我用的是±5V，4脚接-5V，8脚接+5V，其他引脚接法保持不变，上电时的冲击声基本没有了。

The BA3121 common ground isolation chip has a drawback, which is that there is a loud impact sound when powered on. After experimentation, a positive and negative dual power supply can be used. I used ± 5V, with pin 4 connected to -5V and pin 8 connected to+5V. The other pin connections remain unchanged, and the impact sound when powered on is basically eliminated.