ST STM32L4x6 User Manual

DocID024597 Rev 3 439/1693
RM0351 Analog-to-digital converters (ADC)
540
Figure 64. Updating the ADC calibration factor
Converting single-ended and differential analog inputs with a single ADC
If the ADC is supposed to convert both differential and single-ended inputs, two calibrations
must be performed, one with ADCALDIF=0 and one with ADCALDIF=1. The procedure is
the following:
1. Disable the ADC.
2. Calibrate the ADC in single-ended input mode (with ADCALDIF=0). This updates the
register CALFACT_S[6:0].
3. Calibrate the ADC in Differential input modes (with ADCALDIF=1). This updates the
register CALFACT_D[6:0].
4. Enable the ADC, configure the channels and launch the conversions. Each time there
is a switch from a single-ended to a differential inputs channel (and vice-versa), the
calibration will automatically be injected into the analog ADC.
Figure 65. Mixing single-ended and differential channels
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ST STM32L4x6 Specifications

General

Brand	ST
Model	STM32L4x6
Category	Microcontrollers
Language	English