STM32F407IG datasheet(112/154 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F405xx, STM32F407xx

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Doc ID 022152 Rev 1

5.3.21

Temperature sensor characteristics

5.3.22

VBAT monitoring characteristics

5.3.23

Embedded reference voltage

The parameters given in Table 68 are derived from tests performed under ambient

temperature and VDD supply voltage conditions summarized in Table 10.

Table 66.

TS characteristics

Symbol

Parameter

Min

Typ

Max

Unit

(1)

VSENSE linearity with temperature

±1

±2°C

Avg_Slope(1) Average slope

2.5

mV/°C

V25

(1)

Voltage at 25 °C

0.76

tSTART

(2)

Startup time

µs

TS_temp

(3)(2)

ADC sampling time when reading the temperature (1 °C accuracy)

µs

Based on characterization, not tested in production.

Guaranteed by design, not tested in production.

Shortest sampling time can be determined in the application by multiple iterations.

Table 67.

VBAT monitoring characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Resistor bridge for VBAT

-50-

Ratio on VBAT measurement

Er(1)

Error on Q

–1

TS_vbat

(2)(2)

ADC sampling time when reading the VBAT

1 mV accuracy

µs

Guaranteed by design, not tested in production.

Shortest sampling time can be determined in the application by multiple iterations.

Table 68.

Embedded internal reference voltage

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT

Internal reference voltage

–40 °C < TA < +105 °C 1.18

1.21

1.24

TS_vrefint

(1)

ADC sampling time when reading the

internal reference voltage

µs

VRERINT_s

(2)

Internal reference voltage spread over the

temperature range

VDD = 3 V

TCoeff

(2)

Temperature coefficient

ppm/°C

tSTART

(2)

Startup time

µs

Shortest sampling time can be determined in the application by multiple iterations.

Guaranteed by design, not tested in production.

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