ESD Association Advisory ESD ADV1.0-2017-DEFINITIONS-C3

contact-mode discharge

An ESD event initiated within a relay. The relay is connected to the component pin via a probe, and the component is not in a socket.

contact-mode, non-socketed discharge

See constant-mode discharge.

contact voltage measurement

A measurement technique using high input impedance circuitry used to monitor the voltage induced on a conductive plate where there is a direct connection from the circuitry to the conductive plate.

corona

The production of positive and negative ions by a very localized high electric field. The field is normally established by applying a high voltage to a conductor in the shape of a sharp point or wire.

correlation sample

A representative device used for correlating measured voltages with known applied voltages.

coupled non-supply pin pair

Two pins that have an intended direct current path (such as a pass gate or resistors), such as differential amplifier inputs, or low voltage differential signaling (LVDS) pins. They include analog and digital differential pairs and other special function pairs (e.g., D+/D-, XTALin/XTALout, RFin, RFout, TxP/TxN, RxP/RxN, CCP_DP/CCN_DN, etc.).

critical path components

Any portion of the AHE within a certain distance of the device path. That distance should be agreed upon between the manufacturer and end user.

cuff

The portion of a garment’s sleeve towards the end near the hand. This may be a conductive cuff or a device that takes the place of a wrist strap or a wristband type grounding mechanism that makes electrical contact with the body.

current limiting resistance

A resistance value incorporated in series with the wrist strap or foot grounder’s electrical path to ground. This resistance limits electrical current that could pass through the grounding mechanism in the event of inadvertent user contact with electrical potential.

current sense resistor

A resistor, RCS, of less than five ohms which produces a measurable voltage proportional to current through it with an intrinsic rise-time response three times faster than the fastest rise-time to be measured. Δv=Δi x RCS.

current sensor

A device used to measure the current in a circuit or system. This device could be non-invasive (by sensing the change in magnetic flux lines) or be very low impedance inserted in series (such as the ESD target).

current source method

A TLP methodology (sometimes referred to as constant current method) that utilizes a 500 ohm resistor in series with the DUT and measures the voltage and current at the DUT.

current/voltage ringing duration

The current/voltage ringing duration is defined as the length of time between the beginning of the current/voltage pulse and the time that the pulse settles and remains within 95% and 105% of the pulse plateau.