Datasheet

DocID027096 Rev 2 105/137
STM32L073xx Electrical characteristics
117
Figure 32. 12-bit buffered/non-buffered DAC
6.3.17 Temperature sensor characteristics
2. Connected between DAC_OUT and V
SSA
.
3. Difference between two consecutive codes - 1 LSB.
4. Difference between measured value at Code i and the value at Code i on a line drawn between Code 0 and last Code 4095.
5. Difference between the value measured at Code (0x800) and the ideal value = V
REF+
/2.
6. Difference between the value measured at Code (0x001) and the ideal value.
7. Difference between ideal slope of the transfer function and measured slope computed from code 0x000 and 0xFFF when
buffer is off, and from code giving 0.2 V and (V
DDA
– 0.2) V when buffer is on.
8. In buffered mode, the output can overshoot above the final value for low input code (starting from min value).
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Table 68. Temperature sensor calibration values
Calibration value name Description Memory address
TS_CAL1
TS ADC raw data acquired at
temperature of 30 °C, V
DDA
= 3 V
0x1FF8 007A - 0x1FF8 007B
TS_CAL2
TS ADC raw data acquired at
temperature of 130 °C, V
DDA
= 3 V
0x1FF8 007E - 0x1FF8 007F
Table 69. Temperature sensor characteristics
Symbol Parameter Min Typ Max Unit
T
L
(1)
1. Guaranteed by characterization results.
V
SENSE
linearity with temperature - ±1 ±2°C
Avg_Slope
(1)
Average slope 1.48 1.61 1.75 mV/°C
V
130
Voltage at 130°C ±5°C
(2)
2. Measured at V
DD
= 3 V ±10 mV. V130 ADC conversion result is stored in the TS_CAL2 byte.
640 670 700 mV
I
DDA
(TEMP)
(3)
Current consumption - 3.4 6 µA
t
START
(3)
3. Guaranteed by design.
Startup time - - 10
µs
T
S_temp
(4)(3)
4. Shortest sampling time can be determined in the application by multiple iterations.
ADC sampling time when reading the temperature 10 - -
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