STM32H747AI datasheet(201/252 Pages) STMICROELECTRONICS

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DS12930 Rev 1

191/242

STM32H747xI/G

Electrical characteristics

221

6.3.26

Temperature sensor characteristics

tSTART

Start-up time

CL=0.5 µF

300

µs

CL=1 µF

500

CL=1.5 µF

650

IINRUSH

Control of maximum

DC current drive on

VREFBUF_OUT during

startup phase(3)

IDDA(VRE

FBUF)

VREFBUF

consumption from

VDDA

ILOAD = 0 µA

µA

ILOAD = 500 µA

ILOAD = 4 mA

1. Guaranteed by design.

In degraded mode, the voltage reference buffer cannot accurately maintain the output voltage (VDDA−drop voltage).

3. To properly control VREFBUF IINRUSH current during the startup phase and the change of scaling, VDDA voltage should be in

the range of 1.8 V-3.6 V, 2.1 V-3.6 V, 2.4 V-3.6 V and 2.8 V-3.6 V for VSCALE = 011, 010, 001 and 000, respectively.

Table 103. VREFBUF characteristics(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 104. Temperature sensor characteristics

Symbol

Parameter

Min

Typ Max

Unit

TL(1)

1. Guaranteed by design.

VSENSE linearity with temperature

°C

Avg_Slope(2)

2. Guaranteed by characterization.

Average slope

mV/°C

V30(3)

3. Measured at VDDA = 3.3 V ± 10 mV. The V30 ADC conversion result is stored in the TS_CAL1

byte.

Voltage at 30°C ± 5 °C

0.62

tstart_run

Startup time in Run mode (buffer startup)

25.2

µs

tS_temp(1)

ADC sampling time when reading the temperature

Isens(1)

Sensor consumption

0.18 0.31

µA

Isensbuf(1)

Sensor buffer consumption

3.8

6.5

Table 105. Temperature sensor calibration values

Symbol

Parameter

Memory address

TS_CAL1

Temperature sensor raw data acquired value at

30 °C, VDDA=3.3 V

0x1FF1 E820 -0x1FF1 E821

TS_CAL2

Temperature sensor raw data acquired value at

110 °C, VDDA=3.3 V

0x1FF1 E840 - 0x1FF1 E841

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