Other Parts Discussed in Thread: CC2640
Hi everyone,
When I use ADC to sample the voltage value on the platform of CC2640, the sample value is deviation from the true voltage value. For example, When the voltage source is 980mV, the ADC reading value is 974mV if the sample time is 2.7us(AUXADC_SAMPLE_TIME_2P7_US) and the ADC reading value is 986mV when the sample time is 10.9ms (AUXADC_SAMPLE_TIME_10P9_MS). I set the disabling scale mode and the reference is 1.43V. I also call the gain error function and offset function.
The question is following:
1. Why the ADC reading value will change with sampling time?
2. Why the ADC reading value is big difference with the true voltage value?
