CD00161566 Datasheet, PDF (76/105 Pages) STMicroelectronics – nullMedium-density performance line ARM-based 32-bit MCU

Electrical characteristics
STM32F103x8, STM32F103xB
5.3.18
Note:
12-bit ADC characteristics
Unless otherwise specified, the parameters given in Table 46 are derived from tests
performed under the ambient temperature, f_PCLK2 frequency and V_DDA supply voltage
conditions summarized in Table 9.
It is recommended to perform a calibration after each power-up.
Table 46. ADC characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V_DDA
V_REF+
I_VREF
f_ADC
f_S(2)
f_TRIG(2)
V_AIN(3)
R_AIN(2)
Power supply
Positive reference voltage
Current on the V_REF input pin
ADC clock frequency
Sampling rate
External trigger frequency
f_ADC = 14 MHz
Conversion voltage range
External input impedance
See Equation 1 and
Table 47 for details
2.4
2.4
0.6
0.05
-
-
0 (V_SSA or V_REF-
tied to ground)
-
-
-
160⁽¹⁾
-
-
-
-
-
-
3.6
V_DDA
220⁽¹⁾
14
1
823
17
V_REF+
50
V
V
µA
MHz
MHz
kHz
1/f_ADC
V
k
R_ADC(2)
C_ADC(2)
Sampling switch resistance
Internal sample and hold
capacitor
t_CAL(2) Calibration time
t_lat(2)
Injection trigger conversion
latency
t_latr(2)
Regular trigger conversion
latency
t_S(2)
t_STAB(2)
Sampling time
Power-up time
t_CONV(2)
Total conversion time
(including sampling time)
f_ADC = 14 MHz
f_ADC = 14 MHz
f_ADC = 14 MHz
f_ADC = 14 MHz
f_ADC = 14 MHz
-
-
1
-
-
8
5.9
83
-
-
0.214
-
-
3⁽⁴⁾
-
-
0.143
-
-
2⁽⁴⁾
0.107
-
17.1
1.5
-
239.5
0
0
1
1
-
18
14 to 252 (t_S for sampling +12.5 for
successive approximation)
k
pF
µs
1/f_ADC
µs
1/f_ADC
µs
1/f_ADC
µs
1/f_ADC
µs
µs
1/f_ADC
1. Based on characterization, not tested in production.
2. Guaranteed by design, not tested in production.
3.
In devices
connected
connected
delivered in VFQFPN
to
to
VV_SSSSAA.),Dseeveic_Te_as_bt_leha₅t
aacnondmd Le_FQ_iignFuPt_rheep7aT.cFkBaGgeAs6,4Vp_{RaEcFk+aisgeinhtearvnealalyVcR}o_En_Fn₊epcitnedbutot
nVo^DDV^AREa_Fⁿ_-^dpVinR(^EV^FR- _E^is_F-^{inisteirnntaelrlnyally}
4. For external triggers, a delay of 1/f_PCLK2 must be added to the latency specified in Table 46.
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