STM8L151X6 datasheet(103/142 Pages) STMICROELECTRONICS

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DocID15962 Rev 15

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STM8L151x4/6, STM8L152x4/6

Electrical parameters

115

9.3.10

Embedded reference voltage

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

unless otherwise specified.

Table 46. Reference voltage characteristics

Symbol

Parameter

Conditions

Min

Typ

Max.

Unit

IREFINT

Internal reference voltage

consumption

1.4

µA

TS_VREFINT(1)(2)

ADC sampling time when reading

the internal reference voltage

µs

IBUF(2)

Internal reference voltage buffer

consumption (used for ADC)

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 ADC output reaches its final value ±1/2LSB

2. Data 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 ADC conversion accuracy.

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