STM8L151M8 datasheet(108/134 Pages) STMICROELECTRONICS

108 / 134 page

Electrical parameters

STM8L15xx8, STM8L15xR6

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DocID17943 Rev 6

9.3.10

Embedded reference voltage

In the following table, data are 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

510

µs

IBUF(1)

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(1)

Internal reference voltage low power

buffer consumption (used for

comparators or output)

730

1200

IREFOUT(1)(4)

Buffer output current

µA

CREFOUT

Reference voltage output load

tVREFINT(1)

Internal reference voltage startup

time

tBUFEN(1)(2)

Internal reference voltage buffer

startup time once enabled

µs

ACCVREFINT(5)

Accuracy of VREFINT stored in the

VREFINT_Factory_CONV byte

± 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

1000

ppm

1. Guaranteed by design, not tested in production

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

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

4. To guarantee 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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