MAX14895E Просмотр технического описания (PDF) - Maxim Integrated
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MAX14895E Datasheet PDF : 11 Pages
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MAX14895E
Enhanced VGA Port Protector
ESD protection can be tested in various ways. The RED,
GRN, BLU, EN, VS, SYNCH1, SYNCV1, SCL1, and SDA1
terminals of the device are characterized for protection to
the following limits:
• Q15kV using the HBM
• Q8kV using IEC 61000-4-2 Contact Discharge
Human Body Model
Figure 2 shows the HBM. Figure 3 shows the current
waveform it generates when discharged into a low-
impedance state. This model consists of a 100pF capaci-
tor charged to the ESD voltage of interest that is then
discharged into the device through a 1.5kI resistor.
IEC 61000-4-2
The IEC 6100-4-2 standard covers ESD testing and per-
formance of finished equipment. However, it does not
specifically refer to integrated circuits. The device assists
in designing equipment to meet IEC 61000-4-2 without
the need for additional ESD protection components.
The major difference between tests done using the HBM
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 withstand voltage measured
to IEC 61000-4-2 is generally lower than that measured
using the HBM. Figure 4 shows the IEC 61000-4-2 model,
and Figure 5 shows the current waveform for the IEC
61000-4-2 ESD Contact Discharge test.
RC
RD
1MΩ
1.5kΩ
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
CS
100pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
RC
50MΩ TO 100MΩ
RD
330Ω
CHARGE-CURRENT- DISCHARGE
LIMIT RESISTOR
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
CS
150pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 2. Human Body ESD Test Model
IPEAK (AMPS)
100%
90%
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
36.8%
10%
0
TIME
0 tRL
tDL
Figure 3. Human Body Current Waveform
Figure 4. IEC 61000-4-2 ESD Test Model
IPEAK (AMPS)
100%
90%
10%
t
tR = 0.7ns TO 1ns
30ns
60ns
Figure 5. IEC 61000-4-2 ESD Generator Current Waveform
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