Esd test conditions – Rainbow Electronics MAX14541Е User Manual

Page 6

3-Channel, Low-Leakage ESD Protector

MAX14541E

6 ______________________________________________________________________________________

ESD Protection

ESD protection can be tested in various ways. The
MAX14541E are characterized for protection to the fol-
lowing limits:

Q15kV using the Human Body Model

Q8kV using the Contact Discharge Method specified

in IEC 61000-4-2

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

standard is generally lower than that measured using the
Human Body Model. Figure 2 shows the current wave-
form for the Q8kV IEC 61000-4-2 Level 4, ESD Contact
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.

Figure 2. IEC 61000-4-2 ESD Generator Current Waveform

Figure 3. Human Body ESD Test Model

Figure 4. Human Body Model Current Waveform

Figure 5. IEC 61000-4-2 ESD Test Model

= 0.7ns to 1ns

30ns

60ns

100%

90%

10%

PEAK

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE
CAPACITOR

100pF

1MI

1.5kI

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

100%

90%

36.8%

TIME

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)

10%

AMPERES