how to work with adc in nrf52

[ps_anu]

Hi ... 

 I want to measure the temperature using thermistor .. I am working on saadc example .  I need give the reference voltage as 5v how to give that ? is there configuration need to setup .. please guide me .. i want to calibrate the room temperature using thermistor ... i am using NTC  thermistor 

[Turbo J]

You are probably better off with a digital sensor, as a raw NTC would need additonal electronics (opamps or instrumentation amps)  that are mostly off topic here.

Note that in a low power application you just might get away with the NRF internal temperature sensor - maybe after some calibration - as its chip temperature would follow ambient rather closely.

Oh, by the way: NRF5x IO ports don't allow a voltage higher than VCC on them. So your 5V reference is not really possible to measure full scale (without a voltage divider at least).

[ps_anu]

without a voltage divider mean in the sense ? please explain me brief