Using 1.3V voltages of regulators as reference

[Masoumeh]

Hi, 

I am using nRF52832 in a custom board for sending data. I need a reference voltage for my instrumentation amplifier around VDD/2, my VDD is about 2.7 V, so 1.3 V will be okay. I know that there are some pins on nRF52832 with 1.3 V. I want to ask if I can use one of them as I explained and if it's okay which pin is better? 

Thanks

[JONATHAN LL]

Hi,

I guess you can use any GPIO pin and you can read more about it here, https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/gpio.html?cp=4_2_0_19_3_0#unique_1511470077 , but how much current does it draw, it should not exceed 5mA for the GPIO's.

Regards,
Jonathan