STM8L15 datasheet(98/122 Pages) STMICROELECTRONICS

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Electrical parameters

STM8L151xx, STM8L152xx

98/122

Doc ID 15962 Rev 5

9.3.9

Embedded reference voltage

Based on characterization results, unless otherwise specified.

Table 44.

Reference voltage characteristics

Symbol

Parameter

Conditions

Min

Typ

Max.

Unit

IREFINT

Internal reference voltage

consumption

1.4

µA

TS_VREFINT

ADC sampling time when reading

the internal reference voltage(1)

510

µs

IBUF

Internal reference voltage buffer

consumption (used for ADC)

13.5

µA

VREFINT out

Reference voltage output

1.202 1.224 1.242

VREFINT_DIV1

1/4 reference voltage

%VREFINT_COMP

VREFNT_DIV2

1/2 reference voltage

VREFNT_DIV3

3/4 reference voltage

ILPBUF

Internal reference voltage low power

buffer consumption (used for

comparators or output)

730

1200

IREFOUT

Buffer output current(2)

1µA

CREFOUT

Reference voltage output load

tVREFINT

Internal reference voltage startup

time

tBUFEN

Internal reference voltage buffer

startup time once enabled (1)

µs

ACCVREFINT

Accuracy of VREFINT stored in the

VREFINT_Factory_CONV byte(3)

± 5

STABVREFINT

Stability of VREFINT over temperature -40 °C ≤TA ≤ 125 °C

ppm/°C

Stability of VREFINT over temperature

0 °C

≤TA ≤ 50 °C

ppm/°C

STABVREFINT Stability of VREFINT after 1000 hours

TBD

ppm

Defined when ADC output reaches its final value ±1/2LSB

To guaranty less than 1%

VREFOUT deviation

Measured at VDD = 3 V ±10 mV. This value takes into account VDD accuracy and ADC conversion accuracy.

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