MAX14541E Datasheet, PDF (6/8 Pages) Maxim Integrated Products – 3-Channel, Low-Leakage ESD Protector

3-Channel, Low-Leakage ESD Protector
standard is generally lower than that measured using the
Human Body Model. Figure 2 shows the current wave-
I
form for the Q8kV IEC 61000-4-2 Level 4, ESD Contact
100%
90%
Discharge test. The Air-Gap Discharge test involves
approaching the device with a charged probe. The
Contact Discharge method connects the probe to the
device before the probe is energized.
10%
tR = 0.7ns to 1ns
30ns
t
60ns
Figure 2. IEC 61000-4-2 ESD Generator Current Waveform
ESD Protection
ESD protection can be tested in various ways. The
MAX14541E are characterized for protection to the fol-
lowing limits:
U Q15kV using the Human Body Model
U Q8kV using the Contact Discharge Method specified
in IEC 61000-4-2
U Q15kV using the IEC 61000-4-2 Air-Gap Discharge
Method
________________ESD Test Conditions
ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents test
setup, methodology, and results.
Human Body Model
Figure 3 shows the Human Body Model, and Figure
4 shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest
which is then discharged into the device through a 1.5kI
resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. The MAX14541E
helps users design equipment that meets Level 4 of
IEC 61000-4-2. The main difference between tests done
using the Human Body Model and IEC 61000-4-2 Model
is higher peak current in IEC 61000-4-2. Because series
resistance is lower in the IEC 61000-4-2 ESD test model
(Figure 5), the ESD-withstand voltage measured to this
R_C
1MI
R_D
1.5kI
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 3. Human Body ESD Test Model
I_P 100%
90%
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPERES
36.8%
10%
0
0 _tRL
TIME
t_DL
CURRENT WAVEFORM
Figure 4. Human Body Model Current Waveform
R_C
50I to 100I
CHARGE-CURRENT-
LIMIT RESISTOR
R_D
330I
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
150pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 5. IEC 61000-4-2 ESD Test Model
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