Datasheet
Electrical characteristics STM32L052x6 STM32L052x8
92/143 DocID025936 Rev 8
R
ADC
(3)(4)
Sampling switch resistance - - - 1 kΩ
C
ADC
(3)
Internal sample and hold
capacitor
---8pF
t
CAL
(3)(5)
Calibration time
f
ADC
= 16 MHz 5.2 µs
-831/f
ADC
W
LATENCY
(6)
ADC_DR register write
latency
ADC clock = HSI16
1.5 ADC
cycles + 2
f
PCLK
cycles
-
1.5 ADC
cycles + 3
f
PCLK
cycles
-
ADC clock = PCLK/2 - 4.5 -
f
PCLK
cycle
ADC clock = PCLK/4 - 8.5 -
f
PCLK
cycle
t
latr
(3)
Trigger conversion latency
f
ADC
= f
PCLK
/2 = 16 MHz 0.266 µs
f
ADC
= f
PCLK
/2 8.5 1/f
PCLK
f
ADC
= f
PCLK
/4 = 8 MHz 0.516 µs
f
ADC
= f
PCLK
/4 16.5 1/f
PCLK
f
ADC
= f
HSI16
= 16 MHz 0.252 - 0.260 µs
Jitter
ADC
ADC jitter on trigger
conversion
f
ADC
= f
HSI16
-1-1/f
HSI16
t
S
(3)
Sampling time
f
ADC
= 16 MHz 0.093 - 10.03 µs
-1.5-160.51/f
ADC
t
UP_LDO
(3)(5)
Internal LDO power-up time - - - 10 µs
t
STAB
(3)(5)
ADC stabilization time - 14 1/f
ADC
t
ConV
(3)
Total conversion time
(including sampling time)
f
ADC
= 16 MHz,
12-bit resolution
0.875 - 10.81 µs
12-bit resolution
14 to 173 (t
S
for sampling +12.5
for successive approximation)
1/f
ADC
1. V
DDA
minimum value can be decreased in specific temperature conditions. Refer to Table 64: RAIN max for fADC = 16 MHz.
2. A current consumption proportional to the APB clock frequency has to be added (see Table 39: Peripheral current
consumption in Run or Sleep mode).
3. Guaranteed by design.
4. Standard channels have an extra protection resistance which depends on supply voltage. Refer to Table 64: RAIN max for
fADC = 16 MHz.
5. This parameter only includes the ADC timing. It does not take into account register access latency.
6. This parameter specifies the latency to transfer the conversion result into the ADC_DR register. EOC bit is set to indicate the
conversion is complete and has the same latency.
Table 63. ADC characteristics (continued)
Symbol Parameter Conditions Min Typ
Max Unit
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