RM0433 Rev 6 page 994/3289
And page 1024, plus, undocumented in RM 6 factory encoded values:
#define ADC_LINEAR_CALIB_REG_1_ADDR ((uint32_t*) (0x1FF1EC00UL))
#define ADC_LINEAR_CALIB_REG_2_ADDR ((uint32_t*) (0x1FF1EC04UL))
#define ADC_LINEAR_CALIB_REG_3_ADDR ((uint32_t*) (0x1FF1EC08UL))
#define ADC_LINEAR_CALIB_REG_4_ADDR ((uint32_t*) (0x1FF1EC0CUL))
#define ADC_LINEAR_CALIB_REG_5_ADDR ((uint32_t*) (0x1FF1EC10UL))
#define ADC_LINEAR_CALIB_REG_6_ADDR ((uint32_t*) (0x1FF1EC14UL))
that doesn't explain mechanic behind the stage.