Information

Electrical characteristics STM32F20xxx
100/178 DocID15818 Rev 11
Electromagnetic Interference (EMI)g
The electromagnetic field emitted by the device are monitored while a simple application,
executing EEMBC
®
code, is running. This emission test is compliant with SAE IEC61967-2
standard which specifies the test board and the pin loading.
6.3.14 Absolute maximum ratings (electrical sensitivity)
Based on three different tests (ESD, LU) using specific measurement methods, the device is
stressed in order to determine its performance in terms of electrical sensitivity.
Electrostatic discharge (ESD)
Electrostatic discharges (a positive then a negative pulse separated by 1 second) are
applied to the pins of each sample according to each pin combination. The sample size
depends on the number of supply pins in the device (3 parts × (n+1) supply pins). This test
conforms to the JESD22-A114/C101 standard.
Table 42. EMI characteristics
Symbol Parameter Conditions
Monitored
frequency band
Max vs.
[f
HSE
/f
CPU
]
Unit
25/120 MHz
S
EMI
Peak level
V
DD
= 3.3 V, T
A
= 25 °C, LQFP176
package, conforming to SAE J1752/3
EEMBC, code running with ART
enabled, peripheral clock disabled
0.1 to 30 MHz
25 dBµV30 to 130 MHz
130 MHz to 1GHz
SAE EMI Level 4 -
V
DD
= 3.3 V, T
A
= 25 °C, LQFP176
package, conforming to SAE J1752/3
EEMBC, code running with ART
enabled, PLL spread spectrum
enabled, peripheral clock disabled
0.1 to 30 MHz 28
dBµV30 to 130 MHz 26
130 MHz to 1GHz 22
SAE EMI level 4 -
Table 43. ESD absolute maximum ratings
Symbol Ratings Conditions Class
Maximum
value
(1)
Unit
V
ESD(HBM)
Electrostatic discharge
voltage (human body
model)
T
A
= +25 °C conforming to JESD22-A114 2 2000
(2)
V
V
ESD(CDM)
Electrostatic discharge
voltage (charge device
model)
T
A
= +25 °C conforming to JESD22-C101 II 500
1. Based on characterization results, not tested in production.
2. On V
BAT
pin, V
ESD(HBM)
is limited to 1000 V.