DFG-30445-000 Knowles Acoustics, DFG-30445-000 Datasheet - Page 10

• Manufacturer Part Number: DFG-30445-000
• Description: MIC SUPER CARTOID UNI DIRECT FG
• Manufacturer: Knowles Acoustics
• Series: DFGr
• Type: Electret Condenserr

Specifications of DFG-30445-000

• Sensitivity: -69dB ±4dB
• Voltage - Rated: 1.3V
• Current: 50µA
• Size / Dimension: Circular - 2.56mm Dia x 2.69mm H
• S/n Ratio: -
• Filter Type: 13pF
• Impedance: 1.7K Ohm
• Frequency: 100Hz ~ 5kHz
• Termination: Solder Pads
• Direction: Unidirectional
• Port Location: Bottom and Top
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 423-1150

10
SPECIALTY TRANSDUCERS – Microphones
BJ SERIES
Omni-Directional, Noise Canceling 7.87 x 5.59 x 4.01 (mm)
Knowles’ Magnetic Microphones (BJ Series) are based on balanced armature
technology and are self-shielded against external magnetic fields. The
microphones offer high efficiency, stability, and reliability and are small in size.
The diaphragm of the BJ Series responds to pressure differential, giving high
rejection of background noise. Both face and edge ports are offered. In addition,
there is a short distance between front and back ports resulting in improved
noise rejection up to higher frequencies.
BL SERIES
Knowles’ Piezo Ceramic Microphones (BL Series) are rugged, stable and versatile.
BL microphones are available in three different package sizes: standard, thin or
0.5" cylindrical shell and cable assembly. Both communication and broadband
frequency response versions are offered. In addition, BL microphones have high
vibration sensitivity and may be used as accelerometers.
Note: All performance curves are typical
Model
BL-21671-000
BL-21671-140
BL-21785-000
BL-21994-000
BL-23497-000
BL-27046-000
Model
BJ-21590-000
BJ-28411-000
– Omni-Directional Microphone
– Microphone
7.87 x 5.54 x 4.06
7.87 x 5.84 x 4.06
7.87 x 5.54 x 2.24
7.87 x 5.54 x 2.24
Dimensions
Omni-Directional
Noise Canceling
Directivity
(mm)
25.5
25.5
•
•
•
•
•
•
•
•
•
•
•
•
Balanced armature technology
High efficiency, stability and reliability
Self-shielded against external magnetic fields
Face and edge ports
Diaphragm responds to pressure differential giving high
rejection of background noise
Short distance between front and back ports resulting in
improved noise rejection up to higher frequencies
High sensitivity
Wide frequency range
Integral FET amplifier
High resistance to mechanical shock
Various responses
Two case sizes available
Sensitivity @ 1kHz
(dB re1V/0.1Pa)
Port Location
-54.0±3
-54.0±4
-69.0±3
-69.0±3
-69.0±3
-69.0±3
Dual
OJn
Nominal Impedance
DC Supply
at 1kHz (Ohms)
(Vdc)
www.knowles.com
1.3
1.3
1.3
3
3
3
3900
300
Current Drain (uA) “A” Weighted Noise Impedance (Ohms)
Max. Amplifier
160
160
160
160
50
50
Nominal DC Resistance
at 20° C (Ohms)
75.5
900
-35dB
-55dB
-40
-45
-50
-55
-60
-65
-70
-75
-60
-65
-70
-75
-80
-85
-90
-95
32.0 dB
32.0 dB
34.0 dB
34.0 dB
34.0 dB
34.0 dB
100
100
2
2
3
3
Nominal Output
4
4
13000
13000
4000
4000
4000
4000
5
5
6 7 8 9
6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
1k
1k
Faster Overpressure Recovery
965mm Shielded Cable
Broadband Response
Broadband Response
Broadband Response
Broadband Response
Standard Response
Standard Response
2
2
34.3mm Leads
Comments
3
3
4
4
5
5
6
6
7 8 9
7 8 9
10k
10k