MAX4895E Maxim Integrated Products, MAX4895E Datasheet - Page 7

• Manufacturer Part Number: MAX4895E
• Description: VGA Port Protector
• Manufacturer: Maxim Integrated Products

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Figure 1a shows the Human Body Model, and Figure
1b 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
that is then discharged into the test device through a
1.5kΩ resistor.
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does
not specifically refer to integrated circuits. The
MAX4895E assists in designing equipment to meet IEC
61000-4-2 without the need for additional ESD-protec-
tion components.
Figure 1a. Human Body ESD Test Model
Figure 1b. Human Body Current Waveform
AMPS
VOLTAGE
SOURCE
HIGH-
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT-
0
LIMIT RESISTOR
0
t
1MΩ
RL
R
C
100pF
_______________________________________________________________________________________
C s
Human Body Model (HBM)
CURRENT WAVEFORM
RESISTANCE
STORAGE
CAPACITOR
DISCHARGE
TIME
1500Ω
R
D
t
DL
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
IEC 61000-4-2
DEVICE
UNDER
TEST
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC 61000-4-2 is generally
lower than that measured using the Human Body Model.
Figure 1c shows the IEC 61000-4-2 model, and Figure
1d shows the current waveform for IEC 61000-4-2 ESD
Contact Discharge test.
PROCESS: BiCMOS
Figure 1c. IEC 61000-4-2 ESD Test Model
Figure 1d. IEC 61000-4-2 ESD Generator Current Waveform
t
r
= 0.7ns TO 1ns
VOLTAGE
SOURCE
HIGH-
DC
VGA Port Protector
100%
CHARGE-CURRENT-
90%
10%
LIMIT RESISTOR
50MΩ TO 100MΩ
I
R
C
150pF
C s
30ns
RESISTANCE
STORAGE
CAPACITOR
DISCHARGE
330Ω
Chip Information
R
60ns
D
DEVICE
UNDER
TEST
t
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