STM32F103R4 STMicroelectronics, STM32F103R4 Datasheet - Page 70

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STM32F103R4

Manufacturer Part Number
STM32F103R4
Description
Mainstream Performance line, ARM Cortex-M3 MCU with 16 Kbytes Flash, 72 MHz CPU, motor control, USB and CAN
Manufacturer
STMicroelectronics
Datasheet

Specifications of STM32F103R4

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

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Electrical characteristics
70/87
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 15060 Rev 5
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 Σ I
< 10 kΩ,
STM32F103x4, STM32F103x6
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

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