low fg data sheet - issue 02 Pantone 286 Blue.qxd - dreamm
low fg data sheet - issue 02 Pantone 286 Blue.qxd - dreamm
low fg data sheet - issue 02 Pantone 286 Blue.qxd - dreamm
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®<br />
FG<br />
L O W<br />
FG SERIES<br />
Features<br />
N O I S E<br />
Actual Size<br />
• Electret condenser microphone<br />
• Lower noise than Standard FG<br />
• Same electroacoustic sensitivity<br />
as Standard FG<br />
• Various responses available<br />
• Integral RFI/GSM suppression<br />
• High mechanical shock resistance<br />
and exceptionally <strong>low</strong> vibration<br />
sensitivity<br />
• Cylindrical shape and compact<br />
size provide for superior fit rates<br />
• Ideal for multi-microphone pair<br />
applications for directional aids<br />
Standard Responses<br />
<br />
SENSITIVITY IN dB RELATIVE TO 1.0V/0.1 Pa (N/m 2 )<br />
-40<br />
-45<br />
-50<br />
-55<br />
-60<br />
-65<br />
-70<br />
-75<br />
FG-3629/3652<br />
FG-3653<br />
FG-3630<br />
-80<br />
2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9<br />
100 1000 10000<br />
FREQUENCY IN HERTZ<br />
Open circuit sensitivity with 1.3VDC supply<br />
®<br />
<strong>data</strong> <strong>sheet</strong>
Specification Data<br />
Low Noise FG Series<br />
Power Requirements<br />
Supply Voltage (V S<br />
)<br />
Quiescent Current Drain (@ V S<br />
= 1.3V DC )<br />
range: 0.9 to 1.6V DC<br />
typical: 24µA<br />
typical: 1.3V DC maximum: 50µA<br />
Performance<br />
Response/Sensitivity<br />
see curves, page 1<br />
Sensitivity Range<br />
±3dB at 1.0kHz<br />
Low Supply Voltage Sensitivity Loss<br />
(V s reduced from 1.3 to 0.9V DC )<br />
typical: 0.3dB<br />
maximum: 3.0dB<br />
Humidity Coefficient of Sensitivity<br />
typical: 0.06dB per %RH<br />
(in the absence of condensation)<br />
Output Impedance @ 1kHz<br />
range: 2.8 to 6.8kΩ<br />
nominal: 4.4kΩ<br />
Acoustic Polarity<br />
Increased pressure at sound inlet<br />
causes a positive going voltage to<br />
appear at the output terminal, relative<br />
to the negative terminal<br />
Load Voltage (V L )<br />
range: 0.2 to 0.9V DC<br />
typical: 0.5V DC<br />
Output Noise Level<br />
(A-weighted)<br />
maximum: -1<strong>02</strong>dBV<br />
Input-Referred Noise Level<br />
(A-weighted, 1kHz ref.)<br />
typical: 25dB SPL<br />
Input-Referred Vibration Sensitivity*<br />
(1g acceleration, 1kHz ref.)<br />
maximum: 55dB SPL<br />
Temperature Range<br />
operating: -17°C to 63°C<br />
storage: -40°C to 63°C<br />
ESD Tolerance<br />
MIL-STD-750 Class 1 rating<br />
EOS/ESD-S5.1-1993 Class 2 rating<br />
Power Supply Feedthrough Attenuation<br />
typical: 23dB, output-referred<br />
Mechanical<br />
Weight<br />
0.08 grams<br />
Dimensions<br />
See outline drawings, page 3<br />
Optional Soldering Fixture<br />
Case Material<br />
Type 305 stainless steel<br />
Solder Content<br />
Sn63Pb37<br />
Base: ET-3042<br />
Nest Plate: ET-814<br />
2
Model Variations<br />
Low Noise FG Series<br />
Model Port Response<br />
FG-3629 Standard Flat response<br />
FG-3652 Tube Flat response<br />
FG-3653 Standard Low-end roll-off response<br />
FG-3630 Standard 6dB/octave Ski Slope response<br />
Microphones are provided with integral RFI suppression filters.<br />
Other model variations available upon request. Contact<br />
Knowles Electronics for details.<br />
Signal Port Locations<br />
Standard<br />
Tube<br />
( .100 )<br />
2.59 .1<strong>02</strong><br />
2.59 .1<strong>02</strong><br />
2.54( .100 )<br />
2.54<br />
( .<strong>02</strong>9 )<br />
0.79 .031<br />
0.74<br />
( .100 )<br />
2.59 .1<strong>02</strong><br />
2.59 .1<strong>02</strong><br />
2.54( .100 )<br />
2.54<br />
1.45 .057 OUTER<br />
1.37( .054)<br />
DIAMETER<br />
POSITIVE<br />
TERMINAL<br />
POSITIVE<br />
TERMINAL<br />
NEGATIVE<br />
TERMINAL<br />
OUTPUT<br />
TERMINAL<br />
.63 (0.25) MAXIMUM<br />
SOLDER BUILDUP<br />
NEGATIVE<br />
TERMINAL<br />
OUTPUT<br />
TERMINAL<br />
( .061 )<br />
1.65 .065<br />
1.55<br />
.63 (0.25) MAXIMUM<br />
SOLDER BUILDUP<br />
Dimensions in millimeters (inches)<br />
3<br />
®
1/3 Octave Equivalent Noise & Output Noise<br />
30<br />
FG-3629<br />
25<br />
Equivalent Noise (dB SPL)<br />
20<br />
15<br />
10<br />
5<br />
0<br />
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000<br />
1/3 Octave Bands (Hz)<br />
40<br />
FG-3629<br />
Output Noise (dB re 1µV)<br />
20<br />
0<br />
-20<br />
100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000<br />
1/3 Octave Bands (Hz)<br />
Knowles Electronics, Inc. Knowles Europe Knowles Electronics Taiwan, Ltd.<br />
1151 Maplewood Drive York Road, Burgess Hill 53 Pao Hsing Road<br />
Itasca, Illinois 60143 West Sussex, RH15 9TT, England Hsin Tien City, Taipei, Taiwan<br />
Phone: (630) 250-5100 Phone: (44) 1444 235432 Republic of China<br />
Fax: (630) 250-0575 Fax: (44) 1444 248724 Phone: (886) 2 2911 4931<br />
www.knowles.com Fax: (886) 2 2918 6868<br />
Knowles Electronics Japan KK<br />
Micromax Pty. Ltd.<br />
Kyodo Bloom Building P.O. Box 1238<br />
19-1 Miyasaka 2-Chome Wollongong N.S.W.<br />
Setagaya-Ku, Tokyo 156-0051, Japan 2500, Australia<br />
Phone: (81) 3 3439 1151 Phone: (61) 2 4226 6777<br />
Fax: (81) 3 3439 8822 Fax: (61) 2 4226 66<strong>02</strong><br />
NOTE: Specifications are subject to change without notice. The information on this Data Sheet reflects typical applications. Specific test specifications defining<br />
each model are available by requesting Outline Drawing Sheets 1.1 and Performance Specifications Sheets 2.1 of that model number. Knowles’ responsibility is<br />
limited to compliance with the Outline Drawing and the Performance Specification application to the subject model at time of manufacture.<br />
Knowles Electronics, Inc.<br />
4 Issue <strong>02</strong> - 0801
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