Measured on a Texas Instruments reference design with Tc = 25 °C, VDDS = 3.0 V, unless otherwise noted.
|
MIN |
TYP |
MAX |
UNIT |
| Calibrated frequency |
|
32.8 |
|
kHz |
| Calibrated RTC variation(1) |
Calibrated periodically against XOSC_HF(2) |
|
±600(3) |
|
ppm |
| Temperature coefficient. |
|
50 |
|
ppm/°C |
(1) When using RCOSC_LF as source for the low frequency system clock (SCLK_LF), the accuracy of the SCLK_LF-derived Real Time Clock (RTC) can be improved by measuring RCOSC_LF relative to XOSC_HF and compensating for the RTC tick speed. This functionality is available through the TI-provided Power driver.
(2) TI driver software calibrates the RTC every time XOSC_HF is enabled.
(3) Some device's variation can exceed 1000 ppm. Further calibration will not improve variation.