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CC3220SF-LAUNCHXL: ADC measures wrong digital value

Part Number: CC3220SF-LAUNCHXL
Other Parts Discussed in Thread: CC3220SF

Hi, I'm currently working with CC3220sf LaunchXL. The ADC digital value is exactly half of what its supposed to be when I use the adcsinglechannel project from the resources. First I thought

the ADC was damaged but then it seems to linearly increase and decrease as per the input. The digital value is half of the correct value. According to my understanding the input range for the ADC 

is from 0- 1.5V and it is a 12 bit adc which means it has 4096 digital values. 


If input signal is 1.1V then the digital value read is 1400 but the correct value is 2800

The same thing happens when I tested it with another cc3220sf Launchxl.

I would really appreciate if anyone can help me with this?

Thank you.

Kind regards