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MAX3207E Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX3207E Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 13 page ±15kV ESD Protection ESD protection can be tested in various ways. The MAX3205E/MAX3207E/MAX3208E are characterized for protection to the following limits: • ±15kV using the Human Body Model • ±8kV using the Contact Discharge Method specified in IEC 61000-4-2 • ±15kV 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 inter- est, which is then discharged into the device through a 1.5k Ω resistor. IEC 61000-4-2 The IEC 61000-4-2 standard covers ESD testing and performance of finished equipment. The MAX3205E/ MAX3207E/MAX3208E help users design equipment that meets Level 4 of IEC 61000-4-2. The main differ- ence 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 ESD test model (Figure 5), the ESD- withstand voltage measured to this standard is general- ly lower than that measured using the Human Body Model. Figure 2 shows the current waveform for the ±8kV, 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. Dual, Quad, and Hex High-Speed Differential ESD-Protection ICs 6 _______________________________________________________________________________________ CHARGE-CURRENT- LIMIT RESISTOR DISCHARGE RESISTANCE STORAGE CAPACITOR Cs 100pF RC 1M Ω RD 1.5k Ω HIGH- VOLTAGE DC SOURCE DEVICE UNDER TEST Figure 3. Human Body ESD Test Model IP 100% 90% 36.8% tRL TIME tDL CURRENT WAVEFORM PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Ir 10% 0 0 AMPERES Figure 4. Human Body Model Current Waveform CHARGE-CURRENT- LIMIT RESISTOR DISCHARGE RESISTANCE STORAGE CAPACITOR Cs 150pF RC 50 Ω to 100Ω RD 330 Ω HIGH- VOLTAGE DC SOURCE DEVICE UNDER TEST Figure 5. IEC 61000-4-2 ESD Test Model |
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