Geralds answer wasn’t complete. It is true that you cannot exceed the 1v8 input 
range of the ADC, but you can add a circuit before the ADC input that will 
convert the range from 0 to 5 volts -> 0 to 1v8. I would recommend that you ask 
a hardware engineer to assist you with this task as it is difficult to get this 
right if you have no experience in this area. Search Google for “ADC range 
opamp” for circuit examples. 

Regards,
John




> On Sep 13, 2017, at 8:53 AM, Ricardo Andres Gomez 
> <ricardo.gomezt1...@gmail.com> wrote:
> 
> I want to connect an analog output sensor from 0 to 5 volts. The adc by 
> specifications has a range of 0 1.8V. Is it possible to change this range?
> 
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