SAADC accuracy of nRF52810

[moon.kim]

Hi.

I am measuring VDD voltage using SAADC.
VDD is a coin battery.

I want to know the accuracy of SAADC.

Is EG1 / 6 (+3 / -3 %)an error for SAADC?

[Jared]

Hi,

I want to know the accuracy of SAADC.

Is EG1 / 6 (+3 / -3 %)an error for SAADC?

The error specified in the product specification for gain = 1.6 V, means that given that a calibration has been done, a SAADC sample will be somewhere between minimum 3% less than the actual value and up to 3% more than the actual value.

regards

Jared 

[moon.kim]

Hi

so what is the accuracy of SAADC?

[Jared]

Hi,

The accuracy is given by the Error for the given gain. 

regards

Jared 

[moon.kim]

Hi

I have one more question.

What is the ADC accuracy in the range between 2.2V and 3.2V?

And I can't find any information about the ADC offset in the datasheet.

Please let me know this information.

[Jared]

Hi,

again, the accuracy is not specified in terms of the sample voltage but rather the error for a specific gain setting. The ADC offset is specified in the documentation as +- 2 bits for LSB with 10bit resolution after a calibration with a differential setting.

regards

Jared