STM32L431 datasheet(155/200 Pages) STMICROELECTRONICS

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STM32L431xx

Electrical characteristics

168

6.3.22

Temperature sensor characteristics

6.3.23

VBAT monitoring characteristics

6.3.24

Timer characteristics

The parameters given in the following tables are guaranteed by design.

Refer to Section 6.3.14: I/O port characteristics for details on the input/output alternate

function characteristics (output compare, input capture, external clock, PWM output).

Table 75. TS characteristics

Symbol

Parameter

Min

Typ

Max

Unit

TL(1)

VTS linearity with temperature

±1

±2

°C

Avg_Slope(2)

Average slope

2.3

2.5

2.7

mV/°C

V30

Voltage at 30°C (±5 °C)(3)

0.742

0.76

0.785

tSTART

(TS_BUF)(1)

Sensor Buffer Start-up time in continuous mode(4)

-8

µs

tSTART(1)

Start-up time when entering in continuous mode(4)

-70

120

µs

tS_temp(1)

ADC sampling time when reading the temperature

µs

IDD(TS)(1)

Temperature sensor consumption from VDD, when

selected by ADC

-4.7

µA

1. Guaranteed by design.

2. Guaranteed by characterization results.

3. Measured at VDDA = 3.0 V ±10 mV. The V30 ADC conversion result is stored in the TS_CAL1 byte. Refer to Table 7:

Temperature sensor calibration values.

Continuous mode means Run/Sleep modes, or temperature sensor enable in Low-power run/Low-power sleep modes.

Table 76. VBAT monitoring characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Resistor bridge for VBAT

-39

kΩ

QRatio on VBAT measurement

Er(1)

1. Guaranteed by design.

Error on Q

-10

tS_vbat(1)

ADC sampling time when reading the VBAT

µs

Table 77. VBAT charging characteristics

Symbol

Parameter Conditions

Min

Typ

Max

Unit

RBC

Battery

charging

resistor

VBRS = 0

kΩ

VBRS = 1

1.5

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