hello！ I tested AD8400 with an oscilloscope.
the waveforms is followed:
the waveform should be 0V . Why is there such a pulse waveform？
Here are a few things to consider:
1. Have you powered up AD8400?
2. Have you provided common ground for your controller and AD8400?
The function of the programming resistor works properly. But the pulse waveform between W1-B1 will influence my circuit connected to it
Could you please share the schematic.
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