CD00001237 Datasheet, PDF (79/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter

ST6215C ST6225C
EMC CHARACTERISTICS (Cont’d)
11.7.2 Absolute Electrical Sensitivity
Based on three different tests (ESD, LU and DLU)
using specific measurement methods, the product
is stressed in order to determine its performance in
terms of electrical sensitivity. For more details, re-
fer to the AN1181 application note.
11.7.2.1 Electro-Static Discharge (ESD)
Electro-Static Discharges (3 positive then 3 nega-
tive pulses separated by 1 second) are applied to
the pins of each sample according to each pin
combination. The sample size depends of the
number of supply pins of the device (3 parts*(n+1)
supply pin). Two models are usually simulated:
Human Body Model and Machine Model. This test
conforms to the JESD22-A114A/A115A standard.
See Figure 57 and the following test sequences.
Human Body Model Test Sequence
– C_L is loaded through S1 by the HV pulse gener-
ator.
– S1 switches position from generator to R.
– A discharge from C_L through R (body resistance)
to the ST6 occurs.
– S2 must be closed 10 to 100ms after the pulse
delivery period to ensure the ST6 is not left in
charge state. S2 must be opened at least 10ms
prior to the delivery of the next pulse.
Machine Model Test Sequence
– C_L is loaded through S1 by the HV pulse gener-
ator.
– S1 switches position from generator to ST6.
– A discharge from C_L to the ST6 occurs.
– S2 must be closed 10 to 100ms after the pulse
delivery period to ensure the ST6 is not left in
charge state. S2 must be opened at least 10ms
prior to the delivery of the next pulse.
– R (machine resistance), in series with S2, en-
sures a slow discharge of the ST6.
Absolute Maximum Ratings
Symbol
V_ESD(HBM)
V_ESD(MM)
Ratings
Electro-static discharge voltage
(Human Body Model)
Electro-static discharge voltage
(Machine Model)
Conditions
T_A=+25°C
T_A=+25°C
Maximum value ¹⁾ Unit
2000
V
200
Notes:
1. Data based on characterization results, not tested in production.
Figure 57. Typical Equivalent ESD Circuits
S1
R=1500Ω
S1
HIGH VOLTAGE
PULSE
GENERATOR
C_L=100pF
ST6
HIGH VOLTAGE
S2
PULSE
GENERATOR
HUMAN BODY MODEL
ST6
C_L=200pF
S2
MACHINE MODEL
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