Using Fixed Voltage Reference (FVR) for ADC in the PIC16F1827


Raj writes to inform us of his Embedded Lab tutorial with tips on using the Fixed Voltage Reference (FVR) module in enhanced mid-range 8-bit PIC microcontrollers for a precise and accurate A/D conversion.

Raj demos how to use the built-in module of the PIC16F1827 that generates a stable reference voltage internally known as the FVR. “The analog signal for this experiment is taken from the output of a LM34DZ temperature sensor. After the A/D conversion, the PIC16F1827 displays the temperature on a 2×8 character LCD.” He notes the importance of the reference voltage in determining both the range and the resolution (Volt/Count) of the ADC.

The zip file containing the source code and hex files can be downloaded from Embedded Lab.

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