Figure 39. Temperature Sensor And Vrefint Channel Block Diagram - ST STM32F410 Reference Manual

RM0401
Note: The TSVREFE bit must be set to enable the conversion of both internal channels: the
ADC1_IN18 or ADC1_IN16 (temperature sensor) and the ADC1_IN17 (VREFINT).
Main features
• Supported temperature range: –40 to 125 °C
•
Precision: ±1.5 °C
1. V
SENSE
Reading the temperature
To use the sensor:
3. Select ADC1_IN18 input channel.
4. Select a sampling time greater than the minimum sampling time specified in the
datasheet.
5. Set the TSVREFE bit in the ADC_CCR register to wake up the temperature sensor
from power down mode
6. Start the ADC conversion by setting the SWSTART bit (or by external trigger)
7. Read the resulting V
8. Calculate the temperature using the following formula:
–
–
Refer to the datasheet electrical characteristics section for the actual values of V
Avg_Slope.
Figure 39. Temperature sensor and V
is input to ADC1_IN18 and ADC1_IN16.
SENSE
Temperature (in °C) = {(V
Where:
V = V value for 25° C
25 SENSE
Avg_Slope = average slope of the temperature vs. V
or µV/°C)
REFINT
data in the ADC data register
– V ) / Avg_Slope} + 25
SENSE 25
RM0401 Rev 3
Analog-to-digital converter (ADC)
channel block diagram
curve (given in mV/°C
SENSE
and
25
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