46.9 Internal Voltage Reference Specifications
| DC CHARACTERISTICS | Standard
Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise
stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial | ||||||
|---|---|---|---|---|---|---|---|
| Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
| VR_1 | IREF(1,2) | Internal Voltage Reference
ADC.REFCTRL.REFSEL = INTREF DAC.CTRLB.REFSEL = INTREF | 3.996 | 4.096 | 4.128 | V | AVDD (min +0.6) ≥ INTERNAL Voltage 25 °C, AVDD = 5.0V SUPC.VREF.SEL = 3 |
| VR_9 | ACIREF | Internal Voltage Reference Comparator AC.COMPCTRLn.MUXNEG = INTREF | 3.996 | 4.096 | 4.128 | V |
25 °C , AVDD = 5.0V SUPC.VREF.SEL = 3 |
| VR_11 | 1.998 | 2.048 | 2.064 | V |
25 °C, AVDD = 5.0V SUPC.VREF.SEL = 2 | ||
| VR_13 | 0.999 | 1.024 | 1.032 | V |
25 °C, AVDD = 5.0V SUPC.VREF.SEL = 0 | ||
| VR_25 | TDRIFT | Internal Voltage Reference Temperature Drift | -0.021 | — | 0.006 | %/°C | Over [-40, +25]℃ |
| -0.003 | — | 0.009 | %/°C | Over [ +25, +85]℃ | |||
| VR_27 | VDRIFT | Internal Voltage Reference Voltage Drift | -0.111 | — | 0.252 | %/V | Over full operating voltage range |
Note:
- ADC and DAC Internal Voltage Reference voltage 2.4V ≤ IREF ≤ AVDD.
- ADC and DAC reference voltages < 2.4V (that is < 500 µV/step) is not practical and peripheral performance is not guaranteed.