5.2.5.1 Analog-to-Digital Conversion

Once the programmed start-up time (ADC_MR.STARTUP) has elapsed, ADC conversions are sequenced by three operating times:

• Tracking time—the time for the ADC to charge its input sampling capacitor to the input voltage (depends on the impedance of the analog driver connected to the package pin). When several channels are converted to Continuous mode (i.e., without waiting for a trigger event), the inherent tracking time is 6 ADC clock cycles. However, the tracking time can be increased using ADC_MR.TRACKTIM and the TRACKX field in the Extended Mode register (ADC_EMR).
• ADC inherent conversion time—the time for the ADC to convert the sampled analog voltage. This time is constant and is defined from start of conversion to end of conversion.
• Channel conversion period—the effective time between the end of the current channel conversion and the end of the next channel conversion.