芯片:THS4131;输入交流信号幅值0—±4V;
供电:±12V;
用途:THS4131驱动ADS8472;
现象:
1、±12V供电芯片输出电压正常;
2、Pin5和Pin6之间在上电瞬间会有火花,上电10次基本上有7次都会看到火花;
3、Pin5和Pin6之间在上电之后不是一直有火花,而是间隔性有火花,间隔周期随机;
4、检查PCB的相关引脚也没发现问题;
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