Datasheet

Electrical parameters STM8L15xx8, STM8L15xR6
108/134 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
I
REFINT
Internal reference voltage
consumption
1.4 µA
T
S_VREFINT
(1)(2)
ADC sampling time when reading the
internal reference voltage
510 µs
I
BUF
(1)
Internal reference voltage buffer
consumption (used for ADC)
13.5 25 µA
V
REFINT out
Reference voltage output
1.202
(3)
1.224
1.242
(3)
V
I
LPBUF
(1)
Internal reference voltage low power
buffer consumption (used for
comparators or output)
730 1200 nA
I
REFOUT
(1)(4)
Buffer output current 1 µA
C
REFOUT
Reference voltage output load 50 pF
t
VREFINT
(1)
Internal reference voltage startup
time
23 ms
t
BUFEN
(1)(2)
Internal reference voltage buffer
startup time once enabled
10 µs
ACC
VREFINT
(5)
Accuracy of V
REFINT
stored in the
VREFINT_Factory_CONV byte
± 5 mV
STAB
VREFINT
Stability of V
REFINT
over temperature -40 °C ≤ T
A
≤ 125 °C 20 50 ppm/°C
Stability of V
REFINT
over temperature 0 °C ≤ T
A
≤ 50 °C 20 ppm/°C
STAB
VREFINT
Stability of V
REFINT
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 V
DD
= 3 V ±10 mV.
4. To guarantee less than 1%
V
REFOUT
deviation
5. Measured at V
DD
= 3 V ±10 mV. This value takes into account V
DD
accuracy and ADC conversion accuracy.