Microcontroller sensor interfacing exercises

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MPX6116A pressure sensor

• sensitivity: 45 mV/kPa; offset: 0.2 V at 15 kPa
• output voltage range: 0.2 V to 4.8 V

ADC

• Voltage reference: 2.5 V
• Number of bits: 10
• Jusfitication: left

Signal conditioning

• voltage divider
• R1 = 47 k, R2 = 51 k
  

To do:

• Write a function that calculates the sensed value as a function of the ADC code!

Test data:

sensor input	sensor output	ADC input	ADC output	calculated sensor input
78 kPa	3.035 V	1.57944 V	41408	78.0065 kPa
60 kPa	2.225 V	1.15791 V	30336	59.9709 kPa
83 kPa	3.26 V	1.69653 V	44480	83.0105 kPa