ANSI ESD SP5-3.2-2004 pdf download For the Protection of Electrostatic Discharge Susceptible Items Sensitivity Testing Socketed Device Model (SDM) Component Level
4. REQUIRED EQUIPMENT
4.1. Socketed Device Model (SDM) ESD Tester
4.2. Waveform Verification Equipment
4.2.1. Oscilloscope requirements:
4.2.1.1. Minimum single shot bandwidth of 1.0 GHz
4.2.1.2. Minimum sampling rate of 5GS/s
4.2.1.3. If oscilloscopes with different bandwidths are used, see Appendix A for guidance.
4.2.2. Short Module The short module is a 14-pin plastic DIP package with all pins internally shorted together (Thermo KeyTek, part #67-005-925-00, or equivalent). A 22-gauge wire extends through the top of the package to connect from the shorted pins to a pin in the socket. The wire should be as short as possible and should be positioned at either pin 1 or pin 14 of the module, depending on the module being used, to minimize the inductive effects on the discharge waveform (see Figure 1). Generally two modules are required, one with pin 1 removed and the second with pin 14 removed, to allow testing of all pins in the socket.
4.2.3. Current Transducer requirements:
4.2.3.1. Minimum bandwidth of 1 GHz.
4.2.3.2. Peak pulse capability of 12 A.
4.2.3.3. Rise time of less than 1 ns.
4.2.3.4. Capable of accepting a solid conductor of 1.5 mm in diameter,
4.2.3.5. Provide an output voltage per mA , usually between one and five mV per mA . Note 2: A Tektronix CT-1 or equivalent with a maximum cable length of 1 m meets these minimum requirements.
4.2.4. Attenuator
4.2.4.1. An attenuator may be used to decrease the signal voltage from the current transducer to the oscilloscope. If a 20-dB attenuator is used, the voltage levels observed will be reduced by a factor of 10 +/- 12% as defined by the manufacturer.
4.2.5. Test Fixture Boards
4.2.5.1. The 32-pin DIP Test Fixture Board is used to verify the waveforms for the 256-pin simulator and the 25×25 PGA Test Fixture Board is used to verify the waveforms for the 512-pin simulator.
5. EQUIPMENT CALIBRATION AND VERIFICATION REQUIREMENTS 5.1. Equipment Calibration
5.1.1. Calibrate all equipment used to evaluate the tester periodically in accordance with the manufacturer’s recommendation. This includes the oscilloscope and current transducer. Recommended time between calibrations is one year. Calibration shall be traceable to national standards, such as the National Institute of Standards and Technology (NIST) in the United States, or international standards.
5.2. Tester Verification
5.2.1. If the test system uses internal relay matrix switches, then the performance of these relays must be checked. Perform the relay self-test and high voltage test as part of the equipment acceptance testing procedure when the tester is first delivered. Complete the relay self-test and high voltage testing following any repairs or servicing that could affect the discharge waveform. The recommended time between high voltage tests is one year. Retain all waveform records according to the internal record keeping procedures of the organization or institution.