STM8L151F3P6 datasheet(85/112 Pages) STMICROELECTRONICS

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STM8L151x2, STM8L151x3

Electrical parameters

Doc ID 018780 Rev 4

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7.3.9

Embedded reference voltage

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

unless otherwise specified.

Table 41.

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

510

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)

1µA

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

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

Data guaranteed by Design. Not tested in production.

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

To guaranty less than 1%

VREFOUT deviation.

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

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