Question

(Please just show the design of the circuit) 
A printed circuit board manufacturing laboratory needs to have controlled environmental conditions, such as temperature, pressure, and humidity. These variables are measured by means of sensors that deliver an electrical signal which must be conditioned before being sent to a microcontroller for processing.

The challenge is to perform signal conditioning with pressure sensor op amps with part number MPX4250. The conditions that this signal conditioning must meet are the following:

Required work interval:

Pressure 75 to 105 kPa ---> Average conditions for Mexico
Output voltage 0 to 5V ---> With a margin of error of +/- 10%
The sensor signal can be simulated using a voltage source, if the component is not present in the simulation software. This signal conditioning will help the Vo output signal to be controlled by a microcontroller in a next stage of the complete environmental condition monitoring system.

Answer 1

Let us model the sensor to deliver a voltage output of 0 to 100 mV for the pressure range of 75 to 105 kPa.

So the gain of the signal conditioning circuit:

If you think the sensor output is different, then just calculate the gain from the previous equation for that value of sensor voltage and modify the remaining part as required.

Let us design an non-inverting amplifier for this purpose:

Let us choose the input resistance

So, the feedback resistance becomes:

The circuit is simulated in MULTISIM 12.0.1 for better understanding:

Simulation Result: ( Input- Blue, Output- Red)

The input voltage is chosen as 50mV sinusoidal voltage with an offset of +50mV DC. Thus, the 0 to 100 mV range of the sensor output is simulated. Accordingly, the output is observed to be 0 to 5V with negligible oscillation.