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ACD Reference Voltages

Question asked by Ray Hall on Oct 4, 2012
Latest reply on Oct 4, 2012 by Ray Hall

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.