This anomaly applies to Revision 2, build code CAAA-Bxx.
It was inherited from the previous SoC revision Revision 1.
Symptoms
Gain error is outside the expected range.
Conditions
Supply voltage is 2.1 V or lower, CH[n].CONFIG.REFSEL is set to VDD1_4, and CH[n].CONFIG.GAIN is set to Gain1 or Gain1_2.
Consequences
The minimum specification of parameters EG1/2 and EG1 can be down to -4%.
Workaround
Use internal reference.