STM8AL3188TCX datasheet(104/131 Pages) STMICROELECTRONICS

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Electrical parameters

STM8AL318x STM8AL3L8x

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DocID027179 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 49. 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(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

TBD

ppm

1. Guaranteed by design.

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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