37.8 Internal Voltage Reference Specifications
| Standard
operating conditions: VDDIO = AVDD = 1.8V 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 | Internal voltage reference accuracy | -4 | — | 4 | % | ADC.CTRLC.REFSEL = 1V024 |
| VR_3 | -4 | — | 4 | % | ADC.CTRLC.REFSEL = 2V048 | ||
| VR_5 | -4 | — | 4 | % | ADC.CTRLC.REFSEL = 4V096 | ||
| VR_7 | -4 | — | 4 | % | ADC.CTRLC.REFSEL = 2V500 | ||
| VR_9 | IREFVDD | VREF, VDD range | 2.7 | — | 5.5 | V | ADC.CTRLC.REFSEL = 1V024 |
| VR_11 | 2.7 | — | 5.5 | V | ADC.CTRLC.REFSEL = 2V048 | ||
| VR_13 | 4.55 | — | 5.5 | V | ADC.CTRLC.REFSEL = 4V096 | ||
| VR_15 | 2.95 | — | 5.5 | V | ADC.CTRLC.REFSEL = 2V500 | ||
| VR_20 | IREFEX | EXTVREF0 pin voltage | 1.8 | — | VDD | V | VDD < 2.7V |
| VR_22 | 1.024 | — | VDD | V | VDD ≥ 2.7V | ||
| VR_25 | IREFD | Delay for changing voltage reference | — | 2.0 | — | µA | — |
| VR_30 | IREFST | Internal VREF start-up time | — | 10 | — | µs | VDD = 3.0V |