12-Bit Adc Characteristics; Table 49. Adc Characteristics - STMicroelectronics STM32F050G6 Manual

STM32F050xx
6.3.15

12-bit ADC characteristics

Unless otherwise specified, the parameters given in
from tests performed under ambient temperature, f
conditions summarized in
Note: It is recommended to perform a calibration after each power-up.
Table 49. ADC characteristics
Symbol Parameter
Analog supply voltage for
V
DDA
ADC ON
f ADC clock frequency
ADC
(1)
Sampling rate
f
S
(1)
f External trigger frequency
TRIG
V
Conversion voltage range
AIN
(1)
R External input impedance
AIN
(1)
Sampling switch resistance
R
ADC
Internal sample and hold
(1)
C
ADC
capacitor
(1)
Calibration time
t
CAL
(1)
Trigger conversion latency
t
latr
ADC jitter on trigger
Jitter
ADC
conversion
(1)
t Sampling time
S
(1)
t Power-up time
STAB
Total conversion time
(1)
t
CONV
(including sampling time)
1. Guaranteed by design, not tested in production.
Table 15.
Conditions
f = 14 MHz
ADC
See Equation 1 and
Table 50 for details
f = 14 MHz
ADC
f = f /2 = 14 MHz
ADC PCLK
f = f /2
ADC PCLK
f = f /4 = 12 MHz
ADC PCLK
f = f /4
ADC PCLK
f = f = 14 MHz
ADC HSI14
f = f
ADC HSI14
f = 14 MHz
ADC
f = 14 MHz
ADC
Doc ID 023079 Rev 3
Electrical characteristics
Table 49 are preliminary values derived
frequency and V
PCLK2
Min Typ
2.4 -
0.6 -
0.05 -
- -
- -
0 -
- -
- -
- -
5.9
83
0.196
5.5
0.219
10.5
0.188 -
- 1
0.107 -
1.5 -
0 0
1
14 to 252 (t for sampling +12.5 for
S
successive approximation)
supply voltage
DDA
Max Unit
3.6 V
14 MHz
1 MHz
823 kHz
17 1/f
ADC
V V
DDA
50 k
1 k
8 pF
µs
1/f
ADC
µs
1/f
PCLK
µs
1/f
PCLK
0.259 µs
- 1/f
HSI14
17.1 µs
239.5 1/f
ADC
1 µs
18 µs
1/f
ADC
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