I have to find the Resistances R1 & R2 in order to have 0 - 3.3 V input on the ADC. What I cannot find is the Rth on the "Network" part of the circuit.
The text of the original question is:
A sensor produces a voltage between -5 and 3 V. The output resistance of the sensor is 470 Ω. The sensor must be interfaced to an ADC with an input range of 0 to +3.3 V and an input resistance of 3300 Ω. Determine the values of R1 & R2 for the interface network show. Check your work by analyzing the resulting network.
The answer supplied is:
9300930 Ω. R2 = 1400 Ω.