• SAADC consistnetly reads low, regardless of source

    The SAADC on the nRF52832 consistently reads 20-30mV low, regardless of the source (AIN channel or VCC), Tacq, Resolution, or gain. All of the measurements are using the internal 0.6v reference. The readings are low even after calibrating the ADC. This…
  • SAADC wrong readings & impossible to calibrate

    Hi, I am having hard times to make SAADC working on DK-52, SDK13, S132. I need to perform a voltage measurement on command received from a connected device. AIN pin is connected as in the following picture: I also have a digital multimeter…
  • Why my result converted by saadc can't be consistent with voltage from the pin?

    It's my question. I use saadc single mode from nrf52832 to sample voltage .When the original voltage is 24 V ,measurement of the pin is 2.8v,I set the resolution to 10 BITS,I think result should be 2.8/3.3*1024(868), but why my result is 808 all the time…
  • nRF52832 SAADC Occasionally returns 0xFFFF

    I'm having a problem with the nRF52 SAADC. It's configured for One shot operation on Channel 0 using pin Ain4. Gain of 1/6 Tacq set to 40us 8 bit resolution Internal reference Single ended (PSELN connected to ground) No oversample…
  • nRF52832 SAADC error versus temperature

    I'm using the SAADC of an nRF52832. I'd like to reduce the error of my measurements from the nominal +/-3%. I'm calling the NRF_SAADC_TASK_CALIBRATEOFFSET periodically to reduce errors, but I do still measure errors that are in the range of +/-3%. Generally…
  • nRF52832 SAADC sampling

    Hi, I have been able to use SAADC to measure temperature, but my code does not behave in the way I expect it to! In the config file I have the following settings set: #define SAADC_CONFIG_RESOLUTION NRF_SAADC_RESOLUTION_10BIT #define SAADC_CONFIG_OVERSAMPLE…
  • nRF52832 with Thermistor Sensor - ADC

    Hi, I need a bit of help to fully understand how ADC works on nRF52832. I am using a Thermistor sensor like the following to measure temperature: Epoxy Thermistor - 3950 NTC I have followed this setup to connect Thermistor sensor to AIN0(GPIO2…
  • nRF52832 SAADC burst mode

    Hi I want to configure SAADC channel to work in oversampling mode, and to enable burst mode. nRF52832 Objective Product Specification v0.6.2 says: "CH[n].CONFIG.BURST can be enabled to avoid setting SAMPLE task 2OVERSAMPLE times", but I can not…