Hi,
I have an op-amp set up as depicted in the attachment file. I have put a physical wire to VCCSENSE and varied the input voltage with a DC power supply to determine the proportionality of the reading. And, I have observed something unexpected. First of all, the reading seems to be way off from the 'theoretical' value, which is the obvious straight line in the graph. The other two lines are readings from two different circuit boards. Also, there is a sudden slope near the 15V reading. Does anyone have an idea of why the reading is so different from the theoretical value only except at 11.5V and there is a slope change at a higher voltage level?
Thanks,
Lorhve
I have an op-amp set up as depicted in the attachment file. I have put a physical wire to VCCSENSE and varied the input voltage with a DC power supply to determine the proportionality of the reading. And, I have observed something unexpected. First of all, the reading seems to be way off from the 'theoretical' value, which is the obvious straight line in the graph. The other two lines are readings from two different circuit boards. Also, there is a sudden slope near the 15V reading. Does anyone have an idea of why the reading is so different from the theoretical value only except at 11.5V and there is a slope change at a higher voltage level?
Thanks,
Lorhve
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