When I Use dierct battery power without regulator

[JohnathanLyu]

Hi Community,

I have nrf51822 module and use it's ADC. I had 2 AAAA batterys to supply power. But found 3V regulator consumption over 100ua. It's too much with sleep mode.

So I curious without the regulator just directly use battery be power supply is that case ADC measure problem?

I use default ADC setting NRF_ADC_CONFIG_REF_VBG is reference voltage.

Could I just leave 3V regulator directly use battery source power and keep ADC right?

[MartinBL]

So you are using the nRF51's internal DCDC regulator? And with the ADC and you see a current consumption of 100uA?

Or do you have an external voltage regulator drawing 100uA? Anyway, it is no problem connecting 3V directly to the NRF51. It can handle up to 3.6V.