CC112X Temperature sensor parameters
Temperature sensor fitted from | -20 to 80 | °C |
Effect of supply voltage deviance | 1,17 | mV/ VDD-V |
Effect of supply voltage deviance | 0,44 | °C / VDD-V |
Table 1: Temperature sensor parameters
Note that changes in the supply voltage will have an effect on the temperature calculations (as stated in the table
Temperature sensor setup
The temperature can be calculated by measuring the voltage output of the GPIO1 pin on the CC112X. This feature is enabled by enabling the registers in Table 2.
GBIAS | 0x07 |
|
ATEST | 0x2A |
|
ATEST_MODE | 0x0C | (alternatively xx,xx,xx,xx) |
GPIO1 | 0x80 |
|
Table 2: Temperature sensor register setup
1-Point Calibration
A 1-point calibration must be conducted. The calibration should preferable be executed at a temperature in the middle of the desired operating area.
Test Results
These are typical values based on test results of seventeen CC112X EMs.
| VDD - 2V | ||
| Technical information | Value | Unit |
| Typical output voltage @ 0 °C | 727.42 | mV |
| Typical output voltage @ 25 °C | 793.73 | mV |
| Typical temperature coefficient | 2.659796177 | mV / °C |
| VDD - 3V | ||
| Technical information | Value | Unit |
| Typical output voltage @ 0 °C | 728.55 | mV |
| Typical output voltage @ 25 °C | 794.78 | mV |
| Typical temperature coefficient | 2.673268913 | mV / °C |
| VDD - 3.6V | ||
| Technical information | Value | Unit |
| Typical output voltage @ 0 °C | 730.62 | mV |
| Typical output voltage @ 25 °C | 796.94 | mV |
| Typical temperature coefficient | 2.677333823 | mV / °C |