ESD waveform verification
EM TEST recommends the following test equipment:
Digital oscilloscope with at least 2GHz single shot bandwidth
Faraday cage
EM TEST CTR-2 Coaxial Target including 20dB attenuator and high quality coaxial cable
Capturing the waveform on the scope can only be achieved with the proper setup on the Digital Oscilloscope
(DSO). The setup must be chosen to measure waveforms at ± 2KV, ± 4KV, ± 6KV and ± 8KV. There are five
measurements required for each voltage.
Initial peak current
Risetime at 10% to 90% of initial peak current
Current level at 30ns
Current level at 60ns
The time domain for the initial peak and rise time measurement is 1ns/Div and 10ns/Div for the measurement of
the current at 30ns and 60ns.
Below shows typical waveforms at 4KV:
ID TEK/SCD5000,V81.1,DIG/2.0,DSY/3.00
V1 = 20dB x Vm Vm = displayed measuring voltage V
V1 = 2 x I1 V1 = measured voltage across the 2 target
Ip = 20dB x Vm / 2 Ip = discharge current
Ip = 5 x Vm
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