Electrical characteristics
Figure 22. USB timings: definition of data signal rise and fall time
STM32F103xx
Crossover
points
Differen tial
Data L ines
V
CRS
VS S
tf
tr
ai14137
Table 38.
Symbol
USB: Full speed electrical characteristics
Parameter
Conditions
Min
Max
Unit
Driver characteristics
t
r
t
f
t
rfm
V
CRS
Rise time
(1)
Fall Time
(1)
Rise/ fall time matching
Output signal crossover voltage
C
L
= 50 pF
C
L
= 50 pF
t
r
/t
f
4
4
90
1.3
20
20
110
2.0
ns
ns
%
V
1. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
5.3.16
CAN (controller area network) interface
Refer to I/O port characteristics for more details on the input/output alternate function char-
acteristics (CANTX and CANRX).
5.3.17
12-bit ADC characteristics
Unless otherwise specified, the parameters given in
are derived from tests
performed under ambient temperature, f
PCLK2
frequency and V
DDA
supply voltage
conditions summarized in
Note:
It is recommended to perform a calibration after each power-up.
Table 39.
Symbol
V
DDA
V
REF+
f
ADC
f
S
f
TRIG
V
AIN
ADC characteristics
(1)
Parameter
ADC power supply
Positive reference voltage
ADC clock frequency
Sampling rate
External trigger frequency
Conversion voltage range
TBD
f
ADC
= 14 MHz
V
SSA
Conditions
Min
2.4V
2.0
0.6
0.05
Typ
Max
3.6V
V
DDA
14
1
823
17
V
DDA
Unit
V
V
MHz
MHz
kHz
1/f
ADC
V
54/67
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