Temperature Sensor; Gettemp; Table 4-7: Gettemp Command; Table 4-8: Gettemp Response - Semtech LR1121 User Manual

4.3 Temperature Sensor

The LR1121 has a built-in temperature sensor which gives an indication of the internal device temperature.

4.3.1 GetTemp

The temperature measurement can be triggered using command GetTemp(...).

Table 4-7: GetTemp Command

Byte
Data from Host
Data to Host

Table 4-8: GetTemp Response

Byte
Data from Host
Data to Host
The temperature value is a function of an internal reference voltage (typ. 1.35V), and a typical temperature characteristic
(typ -1.7mV/°C), and can be approximated using the following formula:
Temperature degC

GetTemp
NOTE: () uses XOSC mode to get the temperature, so if a TCXO is connected to the
SetTcxoMode
using before calling
LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
0
0x01
Stat1
0
0x00
Stat1
1000
--------------------------- -  
~ 25 + Temp(10:0)/2047*1.35 - 0.7295

–
1.7mV/°C
GetTemp
().
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1
0x1A
Stat2
1
0x00
Temp(15:8)

LR1121
2
0x00
Temp(7:0)
, it must be configured
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