Specifications

ST72104Gx, ST72215Gx, ST72216Gx, ST72254Gx
114/141
EMC CHARACTERISTICS (Cont’d)
13.7.2 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 ST7 application note.
13.7.2.1 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 71 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 ST7 occurs.
– S2 must be closed 10 to 100ms after the pulse
delivery period to ensure the ST7 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 ST7.
– A discharge from C
L
to the ST7 occurs.
– S2 must be closed 10 to 100ms after the pulse
delivery period to ensure the ST7 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 ST7.
Absolute Maximum Ratings
Figure 71. Typical Equivalent ESD Circuits
Notes:
1. Data based on characterization results, not tested in production.
Symbol Ratings Conditions Maximum value
1)
Unit
V
ESD(HBM)
Electro-static discharge voltage
(Human Body Model)
T
A
=+25°C
2000
V
V
ESD(MM)
Electro-static discharge voltage
(Machine Model)
T
A
=+25°C
200
ST7
S2
R=1500ΩS1
HIGH VOLTAGE
C
L
=100pF
PULSE
GENERATOR
ST7
S2
HIGH VOLTAGE
C
L
=200pF
PULSE
GENERATOR
R=10k~10MΩ
S1
HUMAN BODY MODEL MACHINE MODEL