I was wondering what is the max voltage input in the adc ports (P0_1->P0_3 if i'm not mistaken). I'm a bit confused about the Table 280. I'm want to check the voltage on a 3.8V battery.
The on-chip ADC accepts up to 1.2V inputs, however there is a register GP_ADC_ATTN3X that when set to 1 enables a 3x attenuator allowing voltages up to 3.6V. You can find this in the datasheet, table 178. Seems like even in this mode the voltage to sample is out of range but might be worth to look at. Hope this is helpful!
Hi vrabo,
The on-chip ADC accepts up to 1.2V inputs, however there is a register GP_ADC_ATTN3X that when set to 1 enables a 3x attenuator allowing voltages up to 3.6V. You can find this in the datasheet, table 178. Seems like even in this mode the voltage to sample is out of range but might be worth to look at. Hope this is helpful!
Hi vrabo,
You can also check the following post:
https://support.dialog-semiconductor.com/adc-reference
Thanks MT_dialog
Hey
I wanted to measure 3.8V, it seems it won't be possible to do it directly.
Thank you for the answers