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CC2652R: Accuracy of the ADC and the internal battery monitor

Sebastian Frey
Prodigy 60 points
Part Number: CC2652R

Hi

I don't find any information about the accuracy of the integrated battery monitor in the CC2652R.

In the Technical Reference Manual, it I is stated that the battery voltage is measured with an "7-bit SAR-like ADC running at 125 kHz". Does that mean the accuracy is 4.3V / 2^7 = 33.5mV ?

Is the accuracy of the normal 12 Bit ADC higher? Using the 4.3V internal refrence: 4.3V / 2^(9.8) = 6mV   Is this correct?

Info: I just want to measure the change of the voltage, in other words I don't care if there is an Offset.

Thanks!