☑ Esd Diode Parameters

This gives you some confidence about performing in circuit testing and what sort of voltage levels you may witness when doing esd testing. Recall that once the voltage exceeds a certain threshold the esd diode will break down and present a low impedance path to redirect current to ground.

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Esd or tvs protec tion diodes are usually connected in between both to protect electronics from destructive over voltage transients.

Esd diode parameters. The clamping voltage is the voltage that the esd diode clamps to during an esd strike. Reverse working voltage breakdown voltage and polarity configuration. Most msp microcontrollers specify the maximum esd diode current in the absolute maximum ratings section see figure 1.

In this final installment of the series ill cover a few more important esd parameters. The transient voltage suppressor diode also known as a tvs diode is a protection diode designed to protect electronic circuits against transients and overvoltage threats such as eft electrically fast transients and esd electro static discharge. To determine the right protection diode for an application a number of parameters should be known.

Unidirectional iv characteristic curve of an esd and tvs. Esd maximum ratings symbol parameter conditions min max unit per diode vesd electrostatic discharge voltage iec 61000 4 2 contact discharge 12 23kv mil std 883 human body model 10kv table 7. This application note will define the parameters that can be found on esdtvs protection diodes datasheets and explain the relevance of each parameter.

The diode current specified as 2 ma is a constant current that flows through the esd structure to the supply rails to protect the device. This is one of the most important parameters for esd protection device because it is what voltage the system side of the connector will see during an esd. Esd protection diode ultralow capacitance micropackaged diodes for esd protection the esd8472 is designed to protect voltage sensitive components that require ultra low capacitance from esd and transient voltage events.

What follows are the most common esd specification parameters. This is the main voltage rating that states the level where the devices begins to clamp and limit the voltage. Can bus esd protection diode 1 device stressed with ten non repetitive esd pulses.

A typical iv characteristic curve for a unidirectional esd diode is shown in figure 1. Dc parameters the key dc parameters of an esd diode are presented below. Excellent clamping capability low capacitance high breakdown voltage high linearity low leakage and fast response time.

2 measured from pin 1 to 3 or 2 to 3. Tvs diodes are silicon avalanche devices typically chosen. The more of these parameters that are known the easier it is to select the right product.

When considering an esd protection diode always look at the clamping voltage and r dyn of the device. Further down they are saying that it will clamp a 6kv discharge to typically 7v when used with the same esd gun.