SAADC reference voltage

RE: SAADC reference voltage

Sundar_santhanam@1998 — Sun, 03 May 2020 08:58:30 GMT

I used the Vdd Pin as power source which gave 3V as power supply , actually that solved my problem.

RE: SAADC reference voltage

Turbo J — Sun, 03 May 2020 08:16:13 GMT

That chapter talks about the COMPerator and not the SAADC peripherial.

You can compare to an external voltage, but cannot use it for the SAADC reference.

RE: SAADC reference voltage

Monty — Sun, 03 May 2020 07:58:47 GMT

That doesn't seem to be true though! From the nRF52840 docs page check pages ~126 and notice that registers EXTREFSEL and REFSEL can be used to set external reference on all analogue pins A0-A7.

RE: SAADC reference voltage

Turbo J — Mon, 30 Dec 2019 12:04:34 GMT

Nope: Read the PS.

RE: SAADC reference voltage

Sundar_santhanam@1998 — Mon, 30 Dec 2019 06:30:59 GMT

im going to power up my board using USB power supply which is 5V and so is it 5/4?

RE: SAADC reference voltage

Turbo J — Sun, 29 Dec 2019 15:42:23 GMT

The only available references for the SAADC are VDD/4 (VCC/4) and 0.6V internal.