APM32F103TBU7-R datasheet(55/78 Pages) GEEHY

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P a g e 54

Symbol

Parameter

Condition

Minimum

value

Typical

value

Maximum

value

Unit

VREFINT(1)

Built-in Reference Voltage

-40℃ < TA < +125℃

VDD= 2-3.6 V

1.16

1.21

1.26

TS_vrefint(2)

Sampling time of ADC

when reading out internal

reference voltage

5.1

17.1

μs

VREFINT

Change of built-in

reference voltage value in

the full temperature range

VDD=3V±10mV

TCoeff

126

ppm/

℃

The data are obtained from a comprehensive evaluation and are not tested in production.

Guaranteed by design and not tested in production.

5.13

Temperature sensor characteristics

Table45 Temperature Sensor Characteristics

Symbol

Parameter

Minimum

value

Typical

value

Maximum

value

Unit

Avg_Slope(1)

Average slope (VDD = 3.3V, TA = -40~105

℃)

2.7

3.6

3.9

mV/ºC

V25

Voltage at 25ºC (VDD = 2.0-3.6V)

1.38

1.41

1.45

tSTART(2)

Setup time

μs

TS_temp(2)(3)

ADC sampling time when reading the

temperature

17.1

μs

Guaranteed by characteristic analysis and not tested in production.

Guaranteed by design and not tested in production.

The minimum sampling time can be determined by multiple loops in the application.

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