Question about SAADC measurement result

[SeanOY]

Hi engineers,

I want to use saadc to measure the battery's voltage, but the result I get is incorrect. 

So I use the saadc demo of the nrf5_sdk17, then I measure GND(negative result) and VDD(less than 853). Why VDD's adc result is not 1023?

Best Regards,

Sean

[Karl Ylvisaker]

Hello Sean,

I want to use saadc to measure the battery's voltage, but the result I get is incorrect. 

So I use the saadc demo of the nrf5_sdk17, then I measure GND(negative result) and VDD(less than 853). Why VDD's adc result is not 1023?

Did you run the unmodified example? If so, please elaborate what you did in order to measure GND and VDD. Are you using a DK, or a custom board? What power source are you using?
Please also specify which connections you made, and what exact numbers you were seeing when you measured the different voltages.

If you made any modifications to the example, such as changing the SAADC or channel configurations, please elaborate on these as well.

Looking forward to resolve this issue together,

Best regards,
Karl