I am evaluating a 16bit ADC (MCP33131D-05-E/MS) for my project. I want to sample in fully differential mode, but I have doubts as to what voltages are allowed on the Ain+ and Ain-.
Signal conditioning prior to the ADC is done with a dual supply so the voltage swing of the sampled signal will be -5V to +5V.
The datasheet states (on page 1 -> Features) that the ADC has a differential input -VREF to +VREF. This would make it -5V to +5V in my design since I will use a 5V voltage reference.
But then in the absolute maximum ratings it states the following:
Analog inputs w.r.t GND .............. .......... –0.3V to VREF+0.3V
I The question is: can I apply a negative (-VREF) signal to the Ain- or will the magic smoke escape?