36.12 VREF

Table 36-17. VREF Specifications
SymbolDescriptionMin.Typ.✝Max.UnitConditions
VVREF_2V048(1)Internal voltage reference 2.048V-22%

-40°C ≤ TA ≤ +85°C

2.55V ≤ VDD ≤ 5.5V

VVREF_1V024(1)Internal voltage reference 1.024V-33%

-40°C ≤ TA ≤ +85°C

1.8V ≤ VDD ≤ 5.5V

VVREF_2V500(1)Internal voltage reference 2.5V

-40°C ≤ TA ≤ +85°C

3.0V ≤ VDD ≤ 5.5V

VVREF_4V096(1)Internal voltage reference 4.096V

-40°C ≤ TA ≤ +85°C

4.6V ≤ VDD ≤ 5.5V

VVREF_1V024(1)Internal voltage reference 1.024V-55%

-40°C ≤ TA ≤ +125°C

1.8V ≤ VDD ≤ 5.5V

VVREF_2V048(1)Internal voltage reference 2.048V

-40°C ≤ TA ≤ +125°C

2.55V ≤ VDD ≤ 5.5V

VVREF_2V500(1)Internal voltage reference 2.5V

-40°C ≤ TA ≤ +125°C

3.0V ≤ VDD ≤ 5.5V

VVREF_4V096(1)Internal voltage reference 4.096V

-40°C ≤ TA ≤ +125°C

4.6V ≤ VDD ≤ 5.5V

VVREFInternal voltage referenceVDD- 0.4V
tINTREF *Delay for changing internal voltage referenceμs
tVREF_ST *Internal VREF Start-up Time130180μs
VVREFAVREFA external reference input pin voltage1.024VDDV

Unless otherwise specified, data in the “Typ.” column is at TA = 25°C and VDD = 3.0V . These parameters are not tested and are for design guidance only.

* These parameters are characterized but not tested in production.

Note:
  1. The VVREF_xVxxx symbol refers to the respective values of the REFSEL bit fields in the VREF.ADC0REF and VREF.ACREF registers.