Other Parts Discussed in Thread: OPA548
如下电路±5V供电,E/S 通过1K电阻接到V-。输出未使能。上电后V量测V0确有有-4V左右电压,IN-有-2V左右,求解答
通过信号控制光耦打开,E/S信号0V左右,输出使能。IN+前段是DAC输出0V。可以看到开关电源±5V电压都上升了600MA左右,此时V0悬空
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Other Parts Discussed in Thread: OPA548
如下电路±5V供电,E/S 通过1K电阻接到V-。输出未使能。上电后V量测V0确有有-4V左右电压,IN-有-2V左右,求解答
通过信号控制光耦打开,E/S信号0V左右,输出使能。IN+前段是DAC输出0V。可以看到开关电源±5V电压都上升了600MA左右,此时V0悬空