Hi,
Could you check expected error case with abnormal ground?
When 3.3V or 5V is on GND, damage of ADC128S102 is expected according to the datasheet absolute maximum.
The question is
Can this abnormal GND effect to other component around IC like single-ended input or SPI output or VA or VD? even though 3.3V or 5V is on GND, GND is not shorted to VA or VD.
if there is pspice model of ADC128S102 or other similar device, please provide it.
Thanks.
Hi David,
Can this abnormal GND effect to other component around IC like single-ended input or SPI output or VA or VD? even though 3.3V or 5V is on GND, GND is not shorted to VA or VD.
I'm not sure I understand the question. Each specification is referenced to GND. If GND does not equal 0V but instead equals 3.3V then the new specification is 3.3V - 0.3V = 3V for the minimum and 3.3V + 6.5V = 9.8V will be the maximum. But this is an unrealistic point because if some 3.3V is connected to GND (0V), then the source of the 3.3V will try to source an infinite amount of current (V_3.3 - V_GND)/R = I where R = 0 and either hit a current limit or cause permanent damage.
In my experience, abnormal GND connections really only happen when external wires, connections, or supplies are switched a system. For our example above, if we switched GND and VA (3.3V for example), VA = 0V and we calculated above that GND will be 3V min and 9.8V max. Because 0V is outside of the specification, the device will experience damage. Is this what you mean? This is a system issue and every component or IC in the system will be affected.
Hope this helps, not sure if I answer the question.
if there is pspice model of ADC128S102 or other similar device, please provide it.
See the TINA TI spice model below
https://www.ti.com/lit/tsc/snam253
Looks something like this:
Best,
-Cole
