Datasheet
...........continued
Symbol Parameter Conditions Min. Typ. Max. Units
Temperature Sensor
accuracy
Using the method described in the
37.11.8.2 Software-based Refinement of
the Actual Temperature
-10 - 10 °C
Table 37-40. Temperature Sensor Characteristics
(1)
(Device Variant B,C, D and L)
Symbol Parameter Conditions Min. Typ. Max. Units
Temperature sensor
output voltage
T= 25°C, V
DDANA
= 3.3V - 0.688 - V
Temperature sensor
slope
2.06 2.16 2.26 mV/°C
Variation over V
DDANA
voltage
V
DDANA
=1.62V to 3.6V -0.4 1.4 3 mV/V
Temperature Sensor
accuracy
Using the method described in the
37.11.8.2 Software-based Refinement of
the Actual Temperature
-10 - 10 °C
Note: 1. These values are based on characterization. These values are not covered by test limits in
production. Temperature sensor values are not guaranteed for Automotive parts.
37.11.8.2 Software-based Refinement of the Actual Temperature
The temperature sensor behavior is linear but depends on several parameters such as the internal
voltage reference, which itself depends on the temperature. To take this into account, each device
contains a Temperature Log row with data measured and written during the production tests. These
calibration values should be read by software to infer the most accurate temperature readings possible.
This Software Temperature Log row can be read at address 0x00806030
This section specifies the Temperature Log row content and explains how to refine the temperature
sensor output using the values in the Temperature Log row.
37.11.8.2.1 Temperature Log Row
All values in this row were measured in the following conditions:
• V
DDIN
= V
DDIO
= V
DDANA
= 3.3V
• ADC Clock speed = 1MHz
• ADC mode: Free running mode, ADC averaging mode with 4 averaged samples
• ADC voltage reference = 1.0V internal reference (INT1V)
• ADC input = Temperature sensor
Table 37-41. Temperature Log Row Content
Bit position Name Description
7:0 ROOM_TEMP_VAL_INT Integer part of room temperature in °C
11:8 ROOM_TEMP_VAL_DEC Decimal part of room temperature
19:12 HOT_TEMP_VAL_INT Integer part of hot temperature in °C
SAM D21 Family
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 1011