STM32MP157C datasheet(208/258 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32MP157C

208/258

DS12505 Rev 2

6.3.25

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 82. VREFBUF characteristics(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 83. Temperature sensor characteristics

Symbol

Parameter

Min

Typ Max

Unit

TL(1)

1. Guaranteed by design.

VSENSE linearity with temperature (from Vsensor

voltage)

°C

VSENSE linearity with temperature (from ADC counter)

Avg_Slope(2)

2. Guaranteed by characterization.

Average slope (from Vsensor voltage)

mV/°C

Average slope (from ADC counter)

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(1)

Startup time in Run mode (buffer startup)

5.3

40.5

µs

tS_temp(1)

ADC sampling time when reading the temperature

9.8

Isens(1)

Sensor consumption

0.11 0.18 0.31

µA

Isensbuf(1)

Sensor buffer consumption

2.3

3.8

6.1

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