Circuit design-weather monitor

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kumaresanv20

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Hi friends,
I need a 3-input circuit design for monitoring analog inputs from Temp sensor, humidity sensor and gas sensor. The circuit should have the following,
1. ADC(flash or succesiv approx)
2. OP-amp
3. 8-bit processor
4. Bias circuitry
*Design would be simulated using PSPICE
*the digital output will be integrated with FPGA

It wil be really greatful if someone post a circuit that would help me out in my project
Thanking you
 
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Select your sensors, follow the manufacturers suggestions to get all the 0 -100% ranges within a suitable analogue range for the ADC. Select a suitable analogue switch wire its control lines to the micro, connect ADC to micro. Whats the problem?
Frank
 

Sir i am new to the circuit designs, can I use Mux for the 3 inputs or is there any other solution
 

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