BeStar BCM9745NC-W82PLUG User Manual

SPECIFICATION FOR
ELECTRET CONDENSER MICROPHONE

Customer

Customer P/N

BeStar Model Name

Product No.

BCM9745NC-W82Plug

Issue No. BS/TEM01.074A

Issue Date

06/06/06

Approval:

1.Characteristics

2.Appearance

3.Environment Test

4.History change record

Drawn by

Checked by

Approved by

Customer approved

For conform to the European Union Directive on the Restriction of Hazardous Substances(RoHS), this type of
productions forbid use all the hazardous substances as follow:
Lead
Cadmium
Mercury
Hexavalent chromium
Polybrominated biphenyls (PBB)
Polybrominated diphenyl ethers (PBDE)

BESTAR ELECTRONICS INDUSTRY CO.,LTD

No.199 HuangHe West Road.New district,changzhou,

jiangsu Province,P.R.China

Tel:[phone] Fax:[phone]
Http:www.be-star.com
E-mail: [e-mail], [e-mail]

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1. Characteristics

Test Condition (Vs=2.5V RL=2.2Kohm Ta=20 C R.H.=65%)

No. Item Specifications

G

1 Sensitivity -42±2dB(0dB=1V/Pa,1kHz)

2 Impedance Less than 2.2K

Ω

3 Directional Noise concelling

4 S/N Ratio more than40dB(0dB=1V/Pa,1kHz)

2 1

H

G

at1kHz

F

E

D

and shall not be used in whole or in part without its written content

This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.

C

5 Max. Input Sound Level 100dB S.P.L

Frequency Response 20Hz-10kHz

6

7

Rate Voltage 2.5V

Operating Voltage 1.5-10V

8

9

Decreaing Voltage characteristic -3dB(V

★

Frequency Resonse Curve

+30

5020

L=1 Cm

L=50 Cm

200100 2k1k500

+10

0

-10

-20

Relative Response (dB)

-30

s

=1.5V)

5k

10k

20k

F

E

D

C

B

A 06/06/06

A

Rev.

Date:

Drawn by:

Checked by:

Approved by:

Date

王丽娟

Drawn

Note

BESTAR ELECTRONICS INDUSTRY CO.,LTD

65

43

06/06/06

王丽娟

程久生

郭 敏

www.be-st ar.com [e-mail]

Frequency(Hz)

BCM9745NC-W82Plug

Microphone

DRG NO: BS/TEM01.074A

21

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2.Appearance

Tolerances: ±0.2mm

3

2 1

H

G

F

E

Red

D

+

9.7

-

Black
28AWG UL1061

4.5

82±5

G

F

E

D

mesh

and shall not be used in w hole or in part without its written content

This print and inform ation there in are proprietary to Bestar Electronics Industry Co., Ltd.

C

C

Buchse
02 KR-8M

B

Date:

Drawn by:

王丽娟

Drawn

Note

Rev.

06/06/06A

Date

A

BESTAR ELECTRONICS INDUSTRY CO.,LTD

Checked by:

Approved by:

www.be-star.com [e-mail]

564

06/06/06

王丽娟

程久生

郭 敏

3

BCM9745NC-W82Plug

DRG NO: BS/TEM01.074A

21

JST

Microphone

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A

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Measurement Circuit:

G

Terminal 1

PEF

ECM unit

Terminal 2

F

E

Cautions:

MIC.CASE

1.The soldering copper of a smaller type of less than 20W shall be applied.

2.The temperature of the working surface of the soldering copper shall be below 270 C

3.ECM shall be soldered fixed on the metal block (heat sink)which has the higher
radiation effects said heat sink shall contact with each of ECM.

4.The soldering time for each terminal shall be 1~2 seconds.

5.The pin hole after soldering shall be avoided.

D

6.ECM may easily destroyed by the static electricity.and the countermeasure for elimination
the static electricity (the ground or soldering copper,for worktable and for human body) shall
be executed.

and shall not be used in whole or in part without its written content

7.After soldering ECM keeps 2 hours ,SPL shall be tested .

8.Environment Test Condition: temperature :20 2 C humidity max 65%

This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.

C:1μF

RL:2.2K

Ω

Output

Power Supply Vs

Earth

-

G

F

E

D

C

B

Date:

Drawn by:

A

Rev.

06/06/06

Date

A

王丽娟

Drawn

Note

BESTAR ELECTRONICS INDUSTRY CO.,LTD

Checked by:

Approved by:

www.be-star.com [e-mail]

65 4

06/06/06

王丽娟

程久生

郭 敏

3

BCM9745NC-W82Plug

Microphone

DRG NO: BS/TEM01.074A

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3.Environment Test

3.1 High temp.life test
Temperature +70 C
Duration 200hrs

G

3.2 Low temp.life test
Temperature -25 C
Duration 200hrs

3.3 Temperature cycle test
Cycles 5

2

1

H

G

This print and i nformation there in are proprietary to Bestar Electronics Industry Co., Ltd.

F

-25°C

+20°C

10min30min

+70°C

30min

+20°C

10min

F

3.4 Humidity Test
Temperature +40 C
Relative Humidity 90~95%

E

Duration 200hrs

E

Tests above should be measured after leaving normal temperature for 2hrs.

3.5 Vibration Test
Vibration Frequency 10~55Hz
Amplitude 1.52mm/min
Direction 3(x.y&z)
Duration 2hrs each cycle(total 6 hrs)

D

3.6 Drop test

D

Height 100cm
(Dropped to concrete floor in state of packing.)

and shall not be used in whole or i n part without its written content

Direction 3

3.7 Soldering Heat Shock .
Temperature 260 C 5
Duration 3 1 sec

C

3.8 Terminal Mechanical Strength
Strength 1kg

C

Duration 1 min

Notice:
All specifications must be satisfied in this condition.
Sensitivity :Allowable deviation within 3dB from initial sensitivity.

B

Date:

Drawn by:

06/06/06

A

A

Rev.

Date

王丽娟

Drawn

Note

BESTAR ELECTRONICS INDUSTRY CO.,LTD

65 4

Checked by:

Approved by:

www.be-star.com [e-mail]

06/06/06

王丽娟

程久生

郭 敏

3

BCM9745NC-W82Plug

Microphone

DRG NO: BS/TEM01.074A

2

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4. History change record

345

12

H

version
No.

G

A

F

E

D

Change Items

Date

AfterBefore

06/06/06

王丽娟

ApprovedDrawn

G

郭敏

F

E

D

and shal l not be used in whole or in part without its written content

This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.

C

B

Date:

Drawn by:

06/06/06

A

A

REV.

Date

王丽娟

Drawn

Note

Checked by:

Approved by:

BESTAR ELECTRONICS INDUSTRY CO.,LTD

6

5

43

06/06/06

王丽娟

程久生

郭 敏

www.be-star.com [e-mail]

BCM9745NC-W82Plug

Microphone

DRG NO: BS/TEM01.074A

21

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C

B

A