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CM1233
Performance Information
Graphical Comparison and Test Setup
Figure 5 shows that the CM1233 (ESD protector) lowers the peak voltage and clamping voltage by 45% across a wide range
of loading conditions in comparison to a standard ESD protection device. Figure 6 also indicates that the DUP/ASIC protected
by the CM1233 dissipates less energy than a standard ESD protection device. This data was derived using the test setups shown
in Figure 7.
1.2
V PEAK
0.6
Energy (0 ? 50 ns)
STD ESD Device
1.0
0.8
0.5
0.4
STD ESD Device
0.6
0.4
0.2
CM1233
0.3
0.2
0.1
CM1233
0
5
10
20
0
5
10
20
RDUP ( W )
Figure 5. VPeak (8 KV IEC ? 61000 4 ? 2 ESD
RDUP ( W )
Figure 6. Energy Dissipated in DUP vs. RDUP*
Contact Strike) and VClamp vs. Loading (RDUP)*
*RDUP is the emulated Dynamic Resistance (load) of the Device Under Protection (DUP). See Figure 7.
IEC 61000 ? 4 ? 2
Test Standards
Voltage
Probe
IEC 61000 ? 4 ? 2
Test Standards
Voltage
Probe
CM1233
Standard
ESD Device
Device Under
Protection (DUP)
R VARIABLE
Device Under
Protection (DUP)
R VARIABLE
Standard ESD
Device Test Setup
Current
Probe
I RESIDUAL
CM1233 Test Setup
Current
Probe
I RESIDUAL
Figure 7. Test Setups: Standard Device (Left) and CM1233 (Right)
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