RM0090 Analog-to-digital converter (ADC)
Doc ID 018909 Rev 4 288/1422
Figure 52. Case of trigger occurring during injected conversion
11.10 Temperature sensor
The temperature sensor can be used to measure the ambient temperature (T
A
) of the
device.
● On STM23F40x and STM32F41x devices,the temperature sensor is internally
connected to ADC1_IN16 channel which is used to convert the sensor output voltage
to a digital value.
● On STM23F42x and STM32F43x devices, the temperature sensor is internally
connected to the same input channel, ADC1_IN18, as VBAT: ADC1_IN18 is used to
convert the sensor output voltage or VBAT into a digital value. Only one conversion,
temperature sensor or VBAT, must be selected at a time. When the temperature sensor
and the VBAT conversion are set simultaneously, only the VBAT conversion is
performed.
Figure 53 shows the block diagram of the temperature sensor.
When not in use, the sensor can be put in power down mode.
Note: The TSVREFE bit must be set to enable the conversion of both internal channels: the
ADC1_IN16 or ADC1_IN18 (temperature sensor) and the ADC1_IN17 (VREFINT).
Main features
● Supported temperature range: –40 to 125 °C
● Precision: ±1.5 °C
ADC1 reg
CH0 CH1 CH2
CH0
CH2 CH3
CH0
ADC1 inj
ADC2 reg
ADC2 inj
1st trigger
2nd trigger
CH3 CH5 CH6 CH6 CH7
CH3 CH4
CH7 CH8
ai16063
CH0
2nd trigger
3rd trigger
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