STM32F103CB STMicroelectronics, STM32F103CB Datasheet - Page 74

• Manufacturer Part Number: STM32F103CB
• Description: Mainstream Performance line, ARM Cortex-M3 MCU with 128 Kbytes Flash, 72 MHz CPU, motor control, USB and CAN
• Manufacturer: STMicroelectronics

Specifications of STM32F103CB

• Conversion Range: 0 to 3.6 V
• Peripherals Supported: timers, ADC, SPIs, I2Cs and USARTs

Electrical characteristics
74/99
Equation 1: R
The formula above
error below 1/4 of LSB. Here N = 12 (from 12-bit resolution).
Table 47.
1. Based on characterization, not tested in production.
Table 48.
1. ADC DC accuracy values are measured after internal calibration.
2. ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-
3. Based on characterization, not tested in production.
1.5
7.5
13.5
28.5
41.5
55.5
71.5
239.5
Symbol
R
robust) analog input pins should be avoided as this significantly reduces the accuracy of the conversion
being performed on another analog input. It is recommended to add a Schottky diode (pin to ground) to
standard analog pins which may potentially inject negative current.
Any positive injection current within the limits specified for I
affect the ADC accuracy.
EO
EG
ED
ET
EL
AIN
<
------------------------------------------------------------- - R
f
T
ADC
Total unadjusted error
Offset error
Gain error
Differential linearity error
Integral linearity error
s
R
(cycles)
ADC accuracy - limited test conditions
×
AIN
AIN
C
(Equation
ADC
Parameter
max for f
max formula:
T
S
×
ln
(
1) is used to determine the maximum external impedance allowed for an
2
ADC
N
Doc ID 13587 Rev 13
+
0.11
0.54
0.96
2.04
2.96
3.96
5.11
17.1
2
)
= 14 MHz
–
f
f
V
T
Measurements made after
ADC calibration
ADC
PCLK2
ADC
A
DDA
= 25 °C
= 14 MHz, R
(1)
= 3 V to 3.6 V
t
S
= 56 MHz,
Test conditions
(µs)
INJ(PIN)
AIN
(1) (2)
and ΣI
< 10 kΩ,
STM32F103x8, STM32F103xB
INJ(PIN)
0.4
5.9
11.4
25.2
37.2
50
NA
NA
in
±1.3
±0.5
±0.7
±0.8
Typ
±1
Section 5.3.12
R
AIN
max (kΩ)
Max
±1.5
±1.5
±1.5
±1
±2
(3)
does not
Unit
LSB