AN2321 Freescale Semiconductor / Motorola, AN2321 Datasheet - Page 30

• Manufacturer Part Number: AN2321
• Description: Designing for Board Level Electromagnetic Compatibility
• Manufacturer: Freescale Semiconductor / Motorola

AN2321/D
APPENDIX A: GLOSSARY OF TERMS
Electromagnetic
Compatibility
(EMC)
Electromagnetic
Interference
(EMI)
Radiated Emissions
Conducted
Emissions
Immunity
Electrostatic
Discharge
(ESD)
Radiated Immunity
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The capability of electrical and electronic systems, equipment, and devices to
operate in their intended electromagnetic environment within a defined margin
of safety, and at design levels or performance, without suffering or causing
unacceptable degradation as a result of electromagnetic interference
(ANSI C64.14-1992).
The lack of EMC, since the essence of interference is the lack of compatibility.
EMI is the process by which disruptive electromagnetic energy is transmitted
from one electronic device to another via radiated or conducted paths (or both).
In common usage, the term refers particularly to RF signals. EMI can occur in
the frequency range commonly identified as “anything greater than DC to
daylight”.
The component of RF energy that is transmitted through a medium as an
electromagnetic field. RF energy is usually transmitted through free space;
however, other modes of field transmissions may occur.
The component of RF energy that is transmitted through a medium as an
propagating wave, generally through a wire or interconnect cables.
A relative measure of a device or a system’s ability to withstand EMI exposure
while maintaining a predefined performance level.
A transfer of electric charge between bodies of different electrostatic potential
in proximity to each other or through direct contact. This definition is observed
as a high-voltage pulse that may cause damage or loss of functionality to
susceptible devices. Although lightning differs in magnitude as high-voltage
pulse, the term ESD is generally applied to events of lesser amperage and
more specifically to events triggered by human beings.
A product’s relative ability to withstand electromagnetic energy that arrives via
free-space propagation.
Designing for Board Level Electromagnetic Compatibility
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA