STM8L151F3 datasheet(92/122 Pages) STMICROELECTRONICS

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Electrical parameters

STM8L151x2, STM8L151x3

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DocID018780 Rev 9

9.3.9

Embedded reference voltage

In the following table, data is based on characterization results, not tested in production,

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(1)(2)

ADC1 sampling time when

reading the internal reference

voltage

µs

IBUF(2)

Internal reference voltage buffer

consumption (used for ADC1)

13.5

µA

VREFINT out

Reference voltage output

1.202(3)

1.224

1.242(3)

ILPBUF(2)

Internal reference voltage low

power buffer consumption (used

for comparators or output)

730

1200

IREFOUT(2)

Buffer output current(4)

µA

CREFOUT

Reference voltage output load

tVREFINT

Internal reference voltage startup

time

tBUFEN(2)

Internal reference voltage buffer

startup time once enabled (1)

µs

ACCVREFINT

Accuracy of VREFINT stored in the

VREFINT_Factory_CONV byte(5)

± 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

1. Defined when ADC1 output reaches its final value ±1/2LSB

2. Guaranteed by design.

3. Tested in production at VDD = 3 V ±10 mV.

4. To guaranty less than 1%

VREFOUT deviation.

5. Measured at VDD = 3 V ±10 mV. This value takes into account VDD accuracy and ADC1 conversion accuracy.

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