I had a design house do the schematic for my project. The design as two reference voltage circuits for the ADC VRH and VRL. To me these are far more complicated then what I have seen elsewhere. The circuits output 0.7v and 4.7v to VRL and VRH.
The voltage inputs have to read 0 to 5 volts. All the analog inputs have a circuit that converts the 0 to 5 volt to 0.7 to 4.7v. To me I cannot see the point in doing this. What do you think.
I have attached a screen shot of the reference circuits and one of the analog volt inputs.