ESD-2000i ,, Charge Reservoir' Electrostatic Discharge Simulator A Potn erlul. (;ourduieut I;SU Simulator for the PrOlc'ssiuual I iigiueer As researchers work deeper into the actual para- ESD: THE ENEMY OF meters of ESD. they are discovering that test ELECTRONICS PRODUCTS methods which have been accepted for years Electrical charges relocate when two materials rub prove to be inadequate for assuring product im- together. This action is called the triboelectric munity. Consequently, new standards have been the materials are electrically isolated, effect. If drafted incorporating recent discoveries to define this relocated charge does not dissipate. Instead, accurate and repeatable methods for ESD simula- charges continue to accumulate until, at some tion. Recent standards require the use of contact level of high voltage, depending on the material discharge to improve repeatability of test results types and spacing, the insulation will break down as well as the application of simulated events in and the charge will rapidly migrate in an attempt both polarities. Designing and testing for compli- to reach equilibrium. The sudden migration thus ance will aid manufacturers in securing a foothold electrostatic discharge (ESD). produced is in the changing worldwide market. One example of electrostatic buildup through fric- tion is the rubbing of shoes on carpet while walk- SETTING THE STANDARD FOR ing. Human body capacitance is determined by ESD COMPLIANCE TESTING several factors including physical size. This capaci- IEC 801-2:1984 tance stores the accumulated charge at a level The first widely accepted model for ESD was which is limited by the capacitance (for the human contained in IEC 801-2:1984, which specifies a body, typically 100pF - 400pF) and the effects of 150pF/15052 human body model producing a leakage and corona discharge. Once the human waveshape with a rise time faster than 5nS. This body accumulates charge, contact with a neutral is the standard that manufacturers must meet to or oppositely charged item causes a rapid dis- Actual CDI comply with the European Community's EMC charge. The shape of the discharge waveform and ESD-20001 Directive (89/336/EEC) and the generic immu- Waveshape Plot the amplitude of the discharge current depend in nity requirements stated in EN 50082-1. V part on the distributed capacitance and series IEC 801-2:1991 resistance of the human Further scientific examination of the physics of body. A lumped element the ESD phenomenon has led to greater under- model of these distribu- standing and to a revision of the primary ESD ted characteristics is standard to incorporate these revelations. The commonly referred to as second edition (IEC 801-2:1991) has features a human body model. which greatly increase the repeatability of testing The values of the lumped and the correlation of test results with real world elements in the human situations. This revision includes: body model, as well as • Exact specification of the waveshape the maximum charge • Faster sub-nanosecond rise times voltage, vary widely. • Human body model of 150pF/33012 TESTING TO • Use of both positive and negative ESD events. DEFEAT ESD The test was also changed to utilize ESD event Upset of electronic equipment due to incident initialization using a mechanical relay. This test ESD remains a constant and serious problem. method is referred to as contact discharge and Products which experience frequent ESD failures leads to much improved repeatability in ESD in the field are at high risk for losing market share immunity testing. or never gaining market entry. ESD-20001- FINALLY, The right Tin: RIGHT Tool, FOR TilE Jog Compliance Designs ESD-2000i Charge Reservoir'" tool for Electrostatic Discharge Simulator is engineered to test for compliance with ESD standards. The the job... ESD-2000i is the solution to manufacturer's con- cerns about system level immunity. Utilization of the latest ESD technology, including Compliance Design's Charge Reservoir, has yielded sub- nanosecond risetimes for contact discharge events in strict accordance with IEC 801-2, Issue 2. In A addition, the ESD-2000i can easily produce either CDPs new ergonomically designed positive or negative discharges at voltages as high probe system as 25kV in a variety of human models. ate with any of our probes. A further advantage is the ease with which various ESD models may DESIGNED FOR SAFETY AND be utilized simply by selecting a different probe. EASE: OF USE In addition to the two IEC 801-2 probes which Recognizing from extensive experience over are provided with the unit, custom probes engi- many years in our own labs that ESD testing can neered to your specification are available from involve numerous approaches and considerable Compliance Design. Precision, accuracy, and repetition, we have made our probes lightweight repeatability describe the advantages of the to reduce the strain on the operator. This has been ESD-2000i, making it the ultimate tool for ESD achieved by placing the power supply and control regulatory compliance testing. circuitry in a separate base unit which will oper- Typical position for direct application Typical position for Horizontal coupling plane 1.6mx0.8m i ndirect discharge to VCP Typical position for indirect discharge to HCP i t i 7t^st setup shows typical points of application of the ESD event to a device. discharge event. Furthermore, we are able to ACCESSORIES The right offer a wide array of custom probes for use with Compliance Design has developed a number of the base unit upon request. Expand your ESD accessories for use with the ESD-2000i Charge options for testing capabilities with any or all of these options. Reservoir ESD Simulator. These include a vertical coupling plane for indirect application of discharge; A carrying case sold with the system facilitates the job... an IEC 801-2, Issue 2, current sensing transducer transport and storage of the ESD-2000i, its probes, for performance verification; and both magnetic and return strap. and electric field generating probe tip attachments Fbr more information and a demonstration, please for evaluating the vulnerability of products to call Compliance Design at (508) 264-4668. these particular components of the electrostatic TECHNICAL SPECIFICATIONS (IN CONFORMT WITH IEC 801-2) (air-discharge) 2 - 25 kV Discharge voltage V o Discharge voltage V (with contact discharge adapter) 2 - 9 kV o positive/negative Polarity 150 pF ± 10% Discharge capacitor C S Discharge resistor Rd 330 S2 ± 10% Operating modes single/repetitive discharges conforms to IEC 801-2, 1991 Test finger Max. discharge energy 50 mJ at 25 kV < 1 ns for voltages <_ 8 kV Rise time (air discharge) Rise time (with contact adapter) 0.7 - I ns First current peak (with contact discharge adapter) 2 kV 7.5 A ±10% 4 kV 15 A ± 10% at voltage set to: 6kV 22.5A±10% 8kV 30A±10% Current pulse shape conforms to IEC 801-2, 1991 Voltage indication accuracy (LED) ±5% Holding time >5s Charging resistor R h 100 MS2 c Compliance Design lnc. 593 Massachusetts Avenue Boxborough, MA 01719 (508) 264-4668, Fax (508) 263-7086 1994 Compliance Design Inc. KP 2M 894 Specifications herein quoted subject to change without notice.