CD00237391 Datasheet, PDF (115/177 Pages) STMicroelectronics – ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM

STM32F20xxx
Electrical characteristics
5.3.20
12-bit ADC characteristics
Unless otherwise specified, the parameters given in Table 64 are derived from tests
performed under the ambient temperature, f_PCLK2 frequency and V_DDA supply voltage
conditions summarized in Table 12.
Table 64. ADC characteristics
Symbol
Parameter
Conditions
Min
Typ Max
V_DDA Power supply
V_REF+ Positive reference voltage
f_ADC ADC clock frequency
f_TRIG(3) External trigger frequency
V_DDA = 1.8⁽¹⁾ to 2.4 V
V_DDA = 2.4 to 3.6 V
f_ADC = 30 MHz with
12-bit resolution
1.8⁽¹⁾
1.8⁽¹⁾⁽²⁾
0.6
0.6
-
-
-
3.6
-
V_DDA
-
15
-
30
-
1764
-
17
V_AIN Conversion voltage range⁽⁴⁾
0 (V_SSA or V_REF-
tied to ground)
-
V_REF+
R_AIN(3) External input impedance
See Equation 1 for
details
-
R_ADC(3)(5) Sampling switch resistance
1.5
C_ADC(3)
Internal sample and hold
capacitor
-
-
50
-
6
4
-
t_lat(3)
Injection trigger conversion
latency
f_ADC = 30 MHz
-
-
-
0.100
-
3⁽⁶⁾
t_latr(3) Regular trigger conversion latency
f_ADC = 30 MHz
-
-
-
0.067
-
2⁽⁶⁾
t_S(3) Sampling time
t_STAB(3) Power-up time
f_ADC = 30 MHz
f_ADC = 30 MHz
12-bit resolution
0.100
3
-
0.5
-
16
-
480
2
3
-
16.40
f_ADC = 30 MHz
0.43
10-bit resolution
-
16.34
t_CONV(3)
Total conversion time (including
sampling time)
f_ADC = 30 MHz
8-bit resolution
0.37
-
16.27
f_ADC = 30 MHz
0.3
-
16.20
6-bit resolution
9 to 492 (t_S for sampling +n-bit resolution for successive
approximation)
Unit
V
V
MHz
MHz
kHz
1/f_ADC
V
kΩ
kΩ
pF
µs
1/f_ADC
µs
1/f_ADC
µs
1/f_ADC
µs
µs
µs
µs
µs
1/f_ADC
Doc ID 15818 Rev 9
115/177