Tool/software:
Hi,
I'm using the ADS1259-Q1 in a high voltage battery application and I noticed some voltage spikes on he SPI mile between the uC and the ADS1259-Q1 when the contactors are closed that seem to be related to the contactor bounce and the inrush current.
The pulses occur in are both positive and negative direction, they vary in amplitude but the highest I was able to measure is between 20 and 25V in amplitude (could be positive and negative as well) and lengthwise between 400ns to 1.6us. I added a picture of one of the longest positive spikes I measured. The x axis is the number of the Oscilloscope sample with each of the being 400ns apart so the pulse depicted is 4 sample long which translates to 16us.
I measured the pulses 1 or 2 cm away from the ADC chip's pins, so there is some PCB tracks in between but nothing else.
The question is if the ADC chip's input pins can tolerate these spikes. They aren't frequent but more of these pulses can occur at each contactor closing which could be up to 20000 times.
Thanks for the answer in advance
