RE: Using SAADC Advanced mode with high sampling rate together with Zephyr ADC

_jonas_ — Mon, 06 Jan 2025 14:51:50 GMT

Hi Vidar,

sorry for the late response! I implemented the switching by reconfiguring the driver as you suggested and it works fine.

Thanks,

Jonas

RE: Using SAADC Advanced mode with high sampling rate together with Zephyr ADC

Vidar Berg — Thu, 19 Dec 2024 14:26:01 GMT

Hi Jonas,

You are right, it is not possible to use both the zephyr and nrfx to interface the SAADC, so it is necessary to choose one (nrfx in this case). Also, when using the nrfx driver, you can't use different modes concurrently. That said, given how infrequent the battery measurements are, I don't see a problem with reconfiguring the driver before taking the battery sample, then reconfigure it back to sampling the sensor output provided you don't need to sample continuously at 2k.

I would expect the current consumption to be around 1.2-2 mA while sampling (depends on supply voltage on whether you are using the LDO or DCDC regulator).

Best regards,

Vidar