38.5.3 VREF
| Symbol | Description | Min. | Typ.✝ | Max. | Unit | Conditions |
|---|---|---|---|---|---|---|
| VVREF_1V024(1) | Internal Voltage Reference 1.024V | -4 | — | 4 | % | VDD ≥ 2.5V, -40°C ≤ TA ≤ +85°C |
| VVREF_2V048(1) | Internal Voltage Reference 2.048V | -4 | — | 4 | % | VDD ≥ 2.5V, -40°C ≤ TA ≤ +85°C |
| VVREF_4V096(1) | Internal Voltage Reference 4.096V | -4 | — | 4 | % | VDD ≥ 4.55V, -40°C ≤ TA ≤ +85°C |
| VVREF_2V500(1) | Internal Voltage Reference 2.5V | -4 | — | 4 | % | VDD ≥ 2.7V, -40°C ≤ TA ≤ +85°C |
| VVREFA | VREFA input pin voltage | 1.8 | — | VDD | V | VDD < 2.7V |
| 1.024 | — | VDD | V | VDD ≥ 2.7V | ||
| tINTREF * | Delay for changing voltage reference | — | 2 | — | μs | |
| tVREF_ST * | VREF start-up time | — | 10 | — | μs | CLKCTRL.MCLKCTRLA = 0x00 or
0x03 |
| — | 200 | — | μs | CLKCTRL.MCLKCTRLA = 0x01 or
0x02 | ||
|
✝ Data in the “Typ.” column is at TA = 25°C and VDD = 3.0V unless otherwise specified. These parameters are not tested and are for design guidance only. * These parameters are characterized but not tested in production. Note:
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