STM8L052R8 datasheet(95/109 Pages) STMICROELECTRONICS

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STM8L052R8

Electrical parameters

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8.3.10

Embedded reference voltage

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

unless otherwise specified.

Table 43.

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

STABVREFINT

Stability of VREFINT over temperature -40 °C ≤ TA ≤ 85 °C

ppm/°C

Stability of VREFINT over temperature

0 °C

≤ TA ≤ 50 °C

ppm/°C

STABVREFINT

Stability of VREFINT after 1000 hours

TBD

ppm

Guaranteed by design, not tested in production

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

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

To guarantee less than 1%

VREFOUT deviation

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