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ESD electrostatic protection for microphones

Source:Yint Time:2020-08-12 Views:2989
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Microphone, English: A microphone is an energy conversion device that converts sound signals into electrical signals. As a device that comes into contact with the human body, it poses an ESD electrical hazard.

The maximum standard signal value for microphone circuits is usually 5.5 Vp-p, with a maximum frequency below 10kHz. At this frequency, the capacitance of the suppressor does not need to be considered.

 

Protection plan:

 

Part number

Working Voltage DC

VC

IR

C

ESD040208P030

8V

45V

1µA

0.3pf

 

ESD diode application information:

 

Part

number

VRWM

V

IR

µA

VBR(Min)

V

IT

mA

IPP

A

PPk

W

C

pF

 

package

ESD8V0APB

8

1

8.5

1

20

300

150

SOT-23

This scheme complies with IEC61000-4-2 air 15KV contact 8KV

ESD protection can use discrete multilayer varistors or diode arrays.

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